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Security Operations Specialist (System Security)

Toss Bank

Contract|On-site|Seoul

Join Our TeamToss Bank's Security Division consists of specialized teams including Security Policy, Privacy Protection, System Security, Network Security, Red Team, Blue Team, IT Service, and Security Audit.The Security Operations Specialist (System Security) plays a crucial role in safeguarding Toss Bank’s systems against external threats, operating within …

Mar 9, 2026

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System Security Team Leader

Toss Bank

Full-time|On-site|Seoul

About the Team You'll Join The Security Division at Toss Bank comprises several teams including the Security Policy Team, Privacy Protection Team, System Security Team, Network Security Team, Security Red Team, Security Blue Team, IT Service Team, and Security Audit Team. The System Security Team Leader is responsible for safeguarding devices and systems within Toss Bank against various external threats while leading the System Security Team. The Security Division collaborates with various teams to create a safe and reliable service for Toss Bank customers. The System Security Team, in particular, focuses on ensuring secure services from both system/device security and operational perspectives, working closely with product organizations, legal and compliance, platform engineering, and internal audit teams. Responsibilities You'll Have Develop and execute operational plans for device and system information security solutions to protect Toss Bank's customers, leading the team's technical growth and implementation. Design and enhance integrated security operations for device security, system security solutions, AI, and supply chain security. Establish strategies to ensure visibility from a systems security perspective and create an environment that supports optimal operations. Who We're Looking For Individuals with over 10 years of diverse experience in operating security solutions are essential. Experience in directly leading a security team of three or more members to achieve team objectives is highly desirable. Knowledge of operational strategies for device and system security solutions aimed at ensuring safe electronic financial transactions is necessary. Deep understanding of the principles of security solutions, with the ability to set standards for operational policies and guide team discussions for optimal decision-making is required. Experience in automating repetitive tasks to enhance productivity and a proven track record of deep diving into problem-solving are sought after. Familiarity with various open-source tools and the ability to utilize AI in work processes are preferred. Experience in script development using Bash, Python, and API utilization for system integration is necessary. Resume Submission Guidelines We recommend submitting a resume in a free format along with a portfolio. Your application should highlight experiences and knowledge relevant to the role. Present specific contexts and outcomes rather than simply listing responsibilities, focusing on how you solved problems. Detail your leadership experiences, including team size, operational methods, personal contributions, and team achievements. Include any experience in establishing security strategies or improving systems that influenced the entire organization. It would be beneficial to attach examples that demonstrate your technical depth, such as architectures you have designed, problem-solving processes, or automation outcomes. Your Journey to Joining Toss Bank Application submission and...

Apr 2, 2026

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Sales Operations Specialist at Toss Securities | Seoul

Toss Securities

Contract|On-site|Seoul

Join our dynamic Finance team at Toss Securities, where you will play a crucial role in supporting our accounting and financial operations.About Our TeamThe Finance Admin (Accounting) position is a vital part of our Finance team, working alongside Accounting, Treasury, FP&A, and Tax professionals.We closely collaborate with various departments including Product Owners, Compliance, Securities Settlement, and Ledger Systems.Our Finance team comprises members with 5 to 20 years of experience, bringing diverse backgrounds from finance, securities, general trading, and commerce.We aim to build the industry's leading Finance team to enhance Toss Securities' innovative journey.Your ResponsibilitiesAssist in the regular closing processes of Toss Securities.Prepare and submit periodic and ad-hoc reports to external organizations in compliance with regulatory standards.Identify inefficiencies in financial operations and work towards their optimization and automation.Analyze account details in financial statements and verify their accuracy.Identify inefficiencies and risks in assigned tasks, and improve processes accordingly.Who We Are Looking ForApproximately 1 year of experience in financial accounting is desirable but not mandatory.Basic accounting knowledge is essential.We seek proactive individuals who can take initiative in expanding their responsibilities.The Journey to Join Toss SecuritiesApplication Submission > Job Interview > Cultural Fit Interview > Compensation Negotiation > Final Offer and OnboardingImportant NotesThis is a contract position for 1 year, with the possibility of extension or transition to a permanent role based on performance evaluation.Additional InformationEmployment may be rescinded if inaccuracies are found in the resume or if disciplinary actions are noted in the work history.Hiring may be canceled for individuals who fall under the company’s prohibited candidates or disqualification criteria.A Message for Future Colleagues“Are you ready to help us set the industry standard?”One of the most surprising aspects of working at Toss Securities is the absence of unnecessary reporting and approvals, allowing me to focus on what I deem important. This leads to numerous opportunities to collaborate with other departments to build new services, fostering growth and enjoyment in creating something impactful alongside the company. Recently, my team and I have been studying accounting policies and tax laws to establish industry best practices, which has been incredibly fulfilling.As a rapidly growing company, the chance to forge new paths rather than follow established ones is abundant. This thrilling experience is something I believe cannot be easily found elsewhere. Let’s create groundbreaking services together with the best colleagues!

Mar 26, 2026

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Physical Security Specialist - Korea

Control Risks

Full-time|On-site|Seoul, Seoul, South Korea

Role Overview Control Risks is seeking a Physical Security Specialist based in Seoul, South Korea. This position focuses on evaluating, planning, and putting in place physical security solutions that safeguard client assets and people. The role involves working closely with stakeholders to uphold strong security standards across projects and operations.

Apr 15, 2026

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Overseas Operations Specialist at Toss Securities | Seoul

Toss Securities

Contract|On-site|Seoul

#LI-DNI Join Our Team! As an Overseas Operations Specialist at Toss, you will be part of the Retail Operations Team alongside the Overseas Service Specialist, Overseas Operations Manager, and Retail Operations Manager. The Retail Operations Team aims to provide rapid solutions to issues and deliver exceptional customer satisfaction through overseas stock operations, establishing Toss Securities as the leading securities firm for international stocks. Your Responsibilities: Manage communication with brokers and relevant departments to resolve overseas stock issues quickly, overseeing overseas stock items, rights, and operations. Handle customer inquiries related to overseas stocks during nighttime hours, as well as domestic stock inquiries and basic operational tasks. Ideal Candidate: Experience in trading international stocks is essential. No restrictions on international travel or financial transactions. Proficiency in business English is a plus! A customer-first mindset is crucial, given the direct interaction with clients. We are looking for individuals with positive energy and confidence. Please Note: This position is a contract role with a duration of one year. Shifts will be on a three-shift rotation during the night (Day: 10 AM - 7 PM / Middle: 5 PM - 2 AM / Night: 11 PM - 8 AM). Night shift allowances will be provided. Days off may vary according to the overseas stock operation schedule. False information in the resume or documented history could lead to cancellation of employment. Individuals on the restricted employment list or with disqualifying factors according to Toss Securities’ policies may have their applications canceled. Individuals with disabilities and veterans will receive preferential treatment in accordance with relevant laws. Your Journey with Toss Securities: Application Submission > Job Interview > Cultural Fit Interview > Final Acceptance and Onboarding A Note from a Current Team Member: "I am thrilled to contribute to creating differentiated overseas stock services and witness their impact on the growth of Toss Securities. The speed at which we develop new services here is incomparable to my previous experiences at major firms."

Mar 10, 2026

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Security Engineer - Security Analysis Platform Operations

Tosscareers

Full-time|On-site|Seoul

#LI-DNI Join Our Dynamic Security Team! As a Security Engineer at Tosscareers, you will be part of the Information & Security Tribe, handling technical operations within the Security Purple Team and Security Green Team. The Security Purple Team is a hybrid of Red and Blue teams, focusing on event analysis, incident response, vulnerability assessments, penetration testing, and scenario-based threat modeling. We prioritize customer safety and collaborate closely with all teams to enhance Toss's security measures. Your Responsibilities Will Include: Designing, building, and operating SIEM (Splunk, Opensearch, Elasticsearch). Creating robust architectures for secure log collection across various environments (On-Prem, AWS, K8S). Ensuring stable operation and enhancement of log pipelines (NIFI, KAFKA, Hadoop). Establishing and managing logging/monitoring systems for performance optimization and incident response of the Security Data Platform (SIEM). Designing and normalizing standard models for various logs to improve log analysis efficiency. We Are Looking For Candidates Who: Have experience in designing and building scalable and optimized SIEM systems. Can identify and resolve issues in log collection, data loading, search, and query building processes. Have worked with heterogeneous security log pipelines in On-Prem and AWS environments (ETL, ELT). Have standardized various forms of security logs (OCSF, CIM, etc.) for easier analysis. Have automated tasks using Python scripting. Resume Tips: Detail specific examples of your work, particularly your roles in projects, the technologies used, and improvements made before and after. Explain any challenges faced during problem-solving and how you addressed them. If you have diverse problem-solving experiences (technical, managerial), provide concrete examples. Include specific cases where you applied learned technical skills to your work.

Mar 9, 2026

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Security Audit Manager - Information Security Specialist

Toss Securities

Full-time|On-site|seoul

Join Our Team The Security Audit Manager at Toss Securities will be part of the Security Division, working within the dedicated Security Audit Team. This team is responsible for conducting independent internal audits across the entire information security management system, IT infrastructure, and data management frameworks. Collaboration with various teams is essential to create reliable financial services, covering areas including security, infrastructure, platforms, and products. The Security Audit Team consists of specialists focusing on Information Security Management Systems and Data Management, supporting the decisions of the CISO and CPO. Key Responsibilities Develop annual audit plans based on information security policies and relevant regulations, auditing the security management status of IT infrastructure and information security systems comprehensively. Evaluate the adequacy and compliance of critical information security areas, including access control, security policy implementation, and encryption management. Inspect compliance with security requirements in modern IT environments, such as cloud computing and open-source software, including vulnerability management practices. Assess the appropriateness of IT disaster recovery and security incident response processes, identifying areas for improvement. Objectively analyze audit results, drafting reports and proposing actionable improvement strategies for identified issues. Ideal Candidate Profile Proven experience in information security audits or consulting, with demonstrated leadership skills in evaluating and enhancing information security management systems. Expertise in IT infrastructure and security systems (firewalls, IPS/IDS, WAF, etc.), along with experience in vulnerability analysis and assessment. Deep understanding of information security management system certification standards (ISMS-P, ISO 27001, etc.) and relevant regulations for conducting audits. Proficiency in security auditing within modern technology environments, including MSA, Kubernetes, and Cloud. Excellent communication skills to facilitate effective collaboration across diverse teams. Resume Tips Highlight your experience in information security management system audits or internal controls, including specific examples relevant to the role. Include experiences of improving IT environments or information security activities through audit responses and self-assessments. Detail instances where you identified vulnerabilities and made recommendations that enhanced the organization's security posture. If you have security audit experience in cloud environments or emerging technologies, please emphasize that as well as any complex problem-solving experiences with various teams. Application Process with Toss Securities Submit Application > Job Interview > Cultural Fit Interview > Reference Check > Salary Negotiation > Final Offer and Onboarding Important Notes Any discrepancies found in the resume or reports of disciplinary actions during employment may lead to cancellation of the hiring process. Individuals disqualified from hiring according to Toss Securities regulations will not be considered. Persons with disabilities and national veterans are given preference in accordance with relevant laws.

Mar 10, 2026

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Security Engineer - Endpoint Security

Toss Securities

Full-time|On-site|Seoul

About the Team You'll Join The Security Division at Toss Securities is composed of the Security Policy Team, Security Engineering Team, Security Audit Team, and IT Innovation Team, with the Security Engineering Team focusing on technical security tasks. The security team receives comprehensive support across the organization to ensure the safety of Toss Securities services and collaborates closely with all departments. Each team member actively engages with peers in similar roles across subsidiaries, sharing knowledge and experiences to achieve common goals. The team comprises members with diverse experience levels ranging from 1 to 20 years, many of whom have backgrounds in information security firms and corporate information security roles. This year, the Security Engineering Team aims to enhance its information security management system to achieve international recognition and strengthen its capabilities in SOAR, ZTNA, and Cloud/Container security. Your Responsibilities You will identify potential security threats, data leakage risks, and compliance violations across endpoint environments and work to mitigate these issues. Analyze conflicts between security requirements and actual workflows, implementing solutions that balance security and user experience. Address endpoint security issues by analyzing root causes and implementing improvements to prevent recurrence. Manage to maintain consistent endpoint security standards throughout the device lifecycle. Design and automate policy-based control logic to evaluate endpoint status, user context, device posture, and the policy settings of security solutions to determine access permissions. Integrate endpoint security controls with IAM and access control to enhance the overall security framework. Who We're Looking For Experience in designing and customizing detection rules, blocking policies, and monitoring logic based on potential security threats in endpoint environments. Experience in designing and implementing technical solutions such as policy exceptions, temporary authorizations, and selective monitoring to ensure security controls do not hinder actual workflows. Experience in investigating endpoint security issues through log analysis, process tracing, and filesystem investigation at the Windows and macOS levels to identify root causes and establish preventive measures. Experience in designing and managing systems to maintain consistency in security standards throughout the entire lifecycle of devices, from provisioning to disposal. Ability to implement a Policy Decision Point that determines access permissions based on endpoint status information collected via security solution APIs, with experience in Python/Go, OPA, or AI/MCP-based tools being a plus. Experience in integrating security context collected from endpoints (such as device compliance and threat detection results) with IAM, network, and application layer access controls via SCIM, Webhook, and API would be advantageous. Your Pathway to Joining Toss Securities Application Submission > Job Interview > Cultural Fit Interview > Reference Check > Negotiation of Terms > Final Acceptance and Onboarding Additional Information Employment may be rescinded if false information is found in the resume or if any disciplinary actions are confirmed during employment history. Individuals who are prohibited from employment under Toss Securities regulations or have disqualifying factors may have their applications canceled. Individuals with disabilities and veterans will receive preferential treatment in accordance with relevant laws. A Note for Potential Colleagues We value innovation, collaboration, and a passion for security in our team. Join us to make a significant impact in the world of cybersecurity!

Mar 10, 2026

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Security Engineer - Endpoint Security

Toss Bank

Full-time|On-site|Seoul

About the Team You Will Join The Security Division at Toss Bank comprises multiple teams including Security Policy, Privacy Protection, System Security, Network Security, Security Red Team, Security Blue Team, IT Service, and Security Audit. The Security Engineer (Endpoint Security) will work within the Security Division to manage various tasks aimed at protecting endpoints from external threats, particularly as part of the System Security Team. The Security Division collaborates with various teams to create secure and reliable services, and the System Security Team works closely with product organizations, Legal & Compliance, Platform Engineering, and Internal Audit to ensure security and regulatory compliance. We are dedicated to providing a secure environment for electronic financial transactions and to seamlessly integrating security into the daily operations of our users. Key Responsibilities Operate security solutions to protect Toss Bank's customers. Build, manage, and operate endpoint security solutions including Antivirus (AV), Data Loss Prevention (DLP), Network Access Control (NAC), and Endpoint Privilege Management (EPM). Ensure stable operation of endpoint security solutions and quickly resolve operational issues. Establish endpoint security policies for Windows and Mac OS and engage in proactive information security activities. Analyze events through endpoint security solutions and conduct threat response activities. Desired Qualifications A minimum of 5 years of experience in operating endpoint security solutions. Deep understanding of PC and server operating systems. Familiarity with basic networking and architecture concepts. Strong understanding of the operational principles and policies of endpoint security solutions. Experience with open-source endpoint security solutions and automation of security solutions is a plus. Application Instructions Please include detailed descriptions of your responsibilities and specific examples in your resume, as simple project lists may not be sufficient. We recommend submitting a portfolio along with your resume. Highlight your experiences and knowledge relevant to the job area in your application. In your portfolio, please document your studies or practical experiences in security technology and your level of understanding. Join Us at Toss Bank Application Submission > Job Interview > Cultural Fit Interview > Reference Check > Compensation Discussion > Final Acceptance and Onboarding Please Note Any discovery of false information in your resume or disciplinary actions during your employment history may result in cancellation of your application.

Mar 9, 2026

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Security Engineer - AI Security

Daangn

Full-time|On-site|SEOUL

Welcome to the Daangn Team!At Daangn, we strive to create an environment where individuals can grow alongside the company's success.We are here to assist you in reaching that moment of joy while working with wonderful colleagues. Introducing the Security TeamThe Security Team aims to ensure that Daangn provides services securely. We defend against external attacks and prevent the leakage of valuable internal information. All our activities comply with various information protection laws and regulations. By understanding Daangn's business model, we provide clear standards that are implemented technically. Through these efforts, we create a reliable service that users can trust.Key ResponsibilitiesAssess and improve security risks in AI/ML-based service environments.Audit and manage access controls and security configurations for AI service components, including training data, model files, APIs, and infrastructure.Monitor and respond to security issues in LLM and generative AI environments, such as prompt injection and data leaks.Analyze AI service logs to detect anomalies, investigate security events, and resolve issues.Conduct security vulnerability assessments and actions during model deployment and operation.Establish and continuously improve security guidelines and policies.We Seek Candidates Who:Have experience in vulnerability assessments, penetration testing, or incident response.Are familiar with LLMs and understand the operational mechanisms of prompt-based services.Have a foundational understanding of cloud architecture (IAM, networking, storage) in platforms like AWS, GCP, or Azure.Possess basic knowledge of AI/ML or LLM service structures.Have experience in log analysis and root cause identification.Are proactive in addressing security issues, focusing on improvements rather than just reporting.Preferred Qualifications:Understanding of ML pipelines (data collection → training → deployment → monitoring).Experience with container environments such as Docker and Kubernetes.Have at least one year of experience in security, cloud, backend, or ML engineering.Have experience in improving repetitive tasks through security automation or scripting.Regularly learn about and share new AI security issues or trends.Additional InformationThere is a 3-month probation period for full-time hires.As per the Employment Promotion and Vocational Rehabilitation of Persons with Disabilities Act and the Act on the Honorable Treatment and Support of Veterans, individuals with disabilities and veterans will receive preferential hiring.

Mar 16, 2026

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Staff Web Security Engineer - Blue Operations

Coupang, Inc.

Full-time|On-site|Seoul, South Korea

Company OverviewCoupang is committed to delivering exceptional customer experiences. When our customers ask, "How did I live without Coupang?" we know we have fulfilled our mission. With a relentless dedication to making shopping, dining, and everyday life easier for our customers, Coupang is at the forefront of transforming the multibillion-dollar e-commerce industry. As one of the fastest-growing e-commerce companies, we have established a unique position in the domestic market and built trust with our customers.We pride ourselves on being a global public company with a startup culture. This agility is our driving force as we continuously launch new services and expand our business. Every employee at Coupang is given the opportunity to embody an entrepreneurial spirit and drive innovation and initiatives. The courage to dive into work without hesitation and achieve results is at the core of how we operate. At Coupang, you will witness growth in yourself, your colleagues, your team, and the entire company every day.All Coupang employees are genuinely invested in our mission to shape the future of commerce. We tackle customer challenges, defy traditional beliefs, and push the boundaries of what’s possible. If you seek a remarkable work experience in a hyper-connected world with high availability and cutting-edge technology, join us at Coupang.Job OverviewThe Coupang Blue Team plays a pivotal role in monitoring all cyber incidents through log analysis, detecting threats, and responding swiftly to minimize damage. To achieve this goal, the Blue Team comprises various specialized units, including the Security Operations Center (SOC), the Detection and Response Team (DART), the Detection Engineering team focusing on enhancing incident detection capabilities, and the Blue Operations team responsible for the effective and stable operation of diverse security solutions and services.

Dec 23, 2025

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Director of Secure Manufacturing and Stealth Operations

OpenAI

Full-time|On-site|Seoul, South Korea

About Our TeamAt OpenAI, we believe that security is fundamental to our mission of ensuring that artificial general intelligence serves all of humanity. Our dedicated Security team is responsible for safeguarding OpenAI’s technologies, personnel, and products. We blend technical expertise in our innovations with an operational mindset in execution, committed to bolstering all products and research initiatives at OpenAI.Our Secure Manufacturing & Stealth division collaborates closely with supply chain and operational teams to protect our most sensitive projects. We create and enforce safeguards that maintain the confidentiality of our innovations until their launch, while empowering our engineers and partners to act swiftly and efficiently. Our guiding principles emphasize impact, preparedness for transformative technologies, trust-building with cross-functional partners, and nurturing a strong culture of security and confidentiality.About the RoleWe are looking for a Director of Secure Manufacturing and Stealth (SMS) - APAC to spearhead OpenAI’s initiatives in safeguarding sensitive product development and production operations within the APAC supply chain. You will architect and implement programs that protect our most advanced projects and systems, operating at the confluence of physical security, supply chain assurance, and insider risk.This position is focused on securing OpenAI’s global supply chain and manufacturing network, overseeing complex, multi-month security initiatives across vendors, manufacturing partners, and internal operations teams. You will work closely with the Head of Secure Manufacturing & Stealth to identify risks within production environments and ensure that appropriate safeguards are implemented throughout the hardware lifecycle. In this role, you will act as the primary security liaison to supply chain and operations teams, coordinating efforts with engineering, legal, and external vendors to protect sensitive projects while facilitating efficient manufacturing and product development.This position is based in the Asia-Pacific region and requires travel of up to ~25% to international vendor and partner locations.Your Responsibilities Include:Develop and implement strategies for supply chain programs that protect OpenAI’s most advanced projects and systems.Lead cross-functional initiatives with Engineering, Operations, Legal, and Security to establish controls that prevent leaks, data loss, and supply chain vulnerabilities.Conduct proactive risk assessments and security audits across production environments.

Mar 13, 2026

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Internal System Engineer at Toss Securities | Seoul

Toss Securities

Full-time|On-site|Seoul

About the Team You Will Join The Internal System Engineer position at Toss Securities is responsible for managing in-house infrastructure and IT support, collaborating closely with IT Managers and Internal Network/System Engineers. You will design both wired and wireless networks for the headquarters and remote locations, while integrating user-centric security technologies to create a seamless work environment. Your role will focus on enhancing internal infrastructure and operational efficiency, allowing Toss Securities colleagues to concentrate on their work. Your Responsibilities Upon Joining Establish and operate in-house VDI/HCI/virtualization infrastructure. Oversee the deployment and management of the Horizon VDI environment. Build and manage the necessary servers and HCI infrastructure. Streamline repetitive tasks through automation and scripting solutions. We Are Looking for Someone Who Has experience in building and managing servers based on Windows and Linux. Is capable of establishing and operating hypervisor environments such as VMware and Docker. Can manage VMware Horizon-based VDI environments. Possesses experience in setting up and operating various infrastructure services such as DNS, DHCP, AD, and SMB. Has basic knowledge of NAC, VPN, and DLP technologies. Has experience in establishing and managing monitoring tools like Prometheus, Grafana, and Zabbix. Is proficient in automation development using Python, PowerShell, and Ansible. Journey to Joining Toss Securities Application > Job Interview > Cultural Fit Interview > Reference Check > Salary Negotiation > Final Acceptance and Onboarding Please Note If any false information is found in the resume or if disciplinary actions are confirmed during employment, the recruitment may be canceled. Applicants who fall under the hiring restrictions or disqualifying reasons according to Toss Securities regulations may have their applications canceled. Individuals with disabilities or who are veterans will be given preferential treatment according to relevant laws. A Word for Future Colleagues> "You can experience everything as a System Engineer." - I joined Toss Securities after working as a System Engineer in a mobile service company with large traffic. In my previous role, I managed numerous platforms, but at Toss Securities, I realized I had a superficial understanding of infrastructure operations. Here, I closely collaborate with various departments and gain a comprehensive understanding of the overall architecture. I recommend Toss Securities for System Engineers who are eager to learn, passionate about their work, and seeking the best environment for a career quantum leap!

Mar 10, 2026

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Security Researcher at Toss Securities | Seoul

Toss Securities

Full-time|On-site|Seoul

Join Our Security Team! The security team at Toss Securities is composed of dedicated professionals, including a CISO, Security Engineers, Security Researchers, Information Security Managers, and Privacy Managers. We are committed to creating secure services, receiving robust support from the entire organization, and collaborating effectively across all departments. Our team members, with diverse experience ranging from 1 to 20 years, primarily come from backgrounds in information security firms and corporate security roles. We actively share knowledge and collaborate to achieve common goals. To ensure the safe operation of our securities services, we conduct vulnerability assessments across various fields such as applications, cloud, infrastructure, and network. We are also developing automated testing systems using DAST, SAST, and IAST tools to enhance our testing framework. Your Responsibilities: Collaborate with relevant departments from the service planning stage to perform security reviews and provide guidelines for safe service implementation. Conduct vulnerability assessments on Toss Securities' internal and external services (WTS, MTS, operational systems, etc.), analyze results, and suggest improvements. Perform infrastructure vulnerability assessments as required by electronic financial regulations and domestic/international security certifications (Public/Private Cloud, Server, DBMS, Network, etc.). Execute scenario-based internal/external penetration tests and conduct preliminary checks to prevent internal information leaks. Who We're Looking For: Individuals with over 7 years of experience in vulnerability assessments. Experience in operating or conducting assessments with infrastructure vulnerability assessment tools. Experience in developing tools or automation programs for vulnerability assessments. Ability to perform REST API vulnerability assessments based on an understanding of MSA environments. Experience in security audits identifying vulnerabilities such as IDOR in Java or Kotlin source code. Experience in assessing application vulnerabilities in Android or iOS environments. Understanding of electronic financial services and securities systems is a plus. Experience or understanding of Attack Surface Management is a bonus. Application Tips: Include any services or programs you've developed or participated in, specifying the language, role, deployment status, and operational environment. Detail specific vulnerabilities identified through SAST, DAST, Image Scanning, Secret Scanning, and your corrective actions (company/service names can be anonymized). Explain how you assessed and responded to actual security incidents or potential risks, such as secret exposure or high-risk image vulnerabilities. Share challenges and solutions encountered during security assessment automation or policy application processes. Hiring Process at Toss Securities: Application submission > Job interview > Cultural fit interview > Reference check > Salary negotiation > Final acceptance and onboarding. Additional Information: Providing false information in your resume or discovering disciplinary actions in your employment history may lead to termination of the recruitment process.

Mar 27, 2026

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Security Analyst

Toss Bank

Full-time|On-site|Seoul

About the Team You’ll Join The Security Division at Toss Bank is composed of several specialized teams including Security Policy, Privacy Protection, System Security, Network Security, Security Red Team, Security Blue Team, IT Service, and Security Audit. As a Security Analyst at Toss Bank, you will be an integral part of the Security Blue Team, focusing on event analysis and incident response, as well as scenario-based threat modeling. The Security Division collaborates extensively with various teams to ensure the delivery of safe and reliable services. Notably, the Security Blue Team works closely with product organizations, Legal & Compliance, Platform Engineering, and Internal Audit to enhance service safety and compliance. Our commitment lies in securing electronic financial transactions for our customers and ensuring that security is seamlessly integrated into daily operations, providing a safe working environment. Your Responsibilities Analyze and respond to security threats and incidents affecting customer services and employee work environments. Identify security threats and design operational scenarios through various logs collected in the SIEM system. Respond to events detected by security monitoring and review blocking policies for security solutions like DDoS, IPS, IDS, WAF, and AV to prevent recurrence. Enhance operational efficiency through the automation of repetitive security tasks, allowing security personnel to focus on more strategic responsibilities. Ideal Candidate Profile Profound analytical skills for security events and logs, with a solid understanding of various attack techniques (TTPs) and Indicators of Compromise (IOC). Experience in deriving threats and responding through intrusion detection analysis tools and security solutions. Familiarity with creating advanced detection rules based on SIEM. Experience in developing automation scripts for security tasks using Python, PowerShell, or similar tools to improve operational efficiency. Please Include in Your Resume If you have actual incident response experience, please detail the type of incidents, analysis processes, responses, and follow-up actions step by step. Experience in threat modeling through various security logs and direct response efforts is highly valued. If you have automated security tasks using Python or PowerShell, please specify the purpose, implementation, and improvements in operational efficiency. Avoid simply listing results; instead, describe your understanding and learning throughout the project. Application Process at Toss Bank Application submission > Job interview > Cultural fit interview > Reference check > Compensation discussion > Final acceptance and onboarding. Important Notes Employment may be revoked if any false information is found in the resume or if there are disciplinary actions in work history. Applicants with disqualifications as per Toss Bank’s employment regulations may have their applications canceled. Individuals with disabilities or those eligible for national veterans' benefits will be prioritized in accordance with relevant laws.

Mar 9, 2026

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Information Security Manager

Toss Securities

Full-time|On-site|Seoul

About the Team You'll Join The Security Division at Toss Securities comprises the Security Policy Team and the Security Engineering Team, with the Security Policy Team including roles such as Information Security Manager and Privacy Manager. This division enjoys comprehensive support across the organization to create secure Toss Securities services and collaborates closely with all departments. Team members actively exchange experiences and knowledge with peers in similar roles across affiliates to achieve shared goals. The team consists of members with diverse experience ranging from 1 to 20 years, most of whom have backgrounds in information security firms and corporate information security roles. This year, we are focusing on enhancing our information security management system through global security standard certifications and prioritizing risk management based on data flow and business processes. We will also conduct research activities to advance regulatory frameworks. Responsibilities You'll Have Lead the establishment and operation of information security policies, as well as the acquisition and maintenance of domestic and international security certifications (ISMS-P, ISO/IEC 27001, 27701, 27017, 27018, PCI-DSS, etc.). Formulate and amend security policies in response to changes in legislation and regulations, and develop operational processes. Oversee internal audits, inspections, and external institution assessments, driving improvement initiatives. Establish and lead the security risk assessment and management processes. Plan and implement security awareness programs (training, campaigns) to foster a security-centric culture within the organization. Mentor junior colleagues and contribute to the growth of team capabilities. Ideal Candidate Profile Over 5 years of experience in information security policy and management system operations within the finance and electronic finance sectors. Proven experience leading the acquisition and maintenance of domestic and international security certifications. Strong background in responding to external organizations and validated risk management skills. Experience in designing and executing organizational policies and processes. Ability to identify and lead new security challenges in rapidly changing IT/service environments. Journey to Joining Toss Securities Application submission > Role interview > Cultural fit interview > Reference check > Compensation negotiation > Final acceptance and onboarding. Please Note Any discrepancies found in the resume or supporting documents, or any disciplinary issues in the work history may lead to cancellation of employment. Candidates identified as prohibited or disqualified under Toss Securities internal regulations may also have their applications canceled. Individuals with disabilities and those eligible for national veteran benefits are given preferential treatment in accordance with relevant laws. A Message for Future Colleagues You can create an information security management system with comprehensive organizational support. At Toss Securities, all colleagues share an understanding of the importance of information security, and the Security Division builds the management system based on this shared awareness. To establish a high-level information security management system, we not only comply with mandatory requirements but also embrace various challenges to present new cultures and trends. This means you will gain diverse experiences not confined to routine tasks. We are looking for passionate colleagues who want to contribute to the security of Toss Securities while experiencing explosive growth in their careers.

Mar 9, 2026

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Security Engineer | Infrastructure (Security, Penetration Testing)

daangn

Full-time|On-site|SEOUL

Security Engineers at daangn focus on protecting infrastructure and keeping user data safe. This position centers on finding vulnerabilities through penetration testing and setting up strong security protocols across our systems. Role overview This role involves hands-on work with infrastructure security in Seoul. The main responsibility is to identify and assess security risks, then act to address those issues. Attention to detail and a methodical approach are important, as your work directly impacts the safety of our platform. What you will do Conduct penetration tests to uncover vulnerabilities in our infrastructure Implement and maintain security protocols to meet high standards Support ongoing efforts to protect user data and system integrity Requirements Experience with infrastructure security and penetration testing Ability to identify, analyze, and address security vulnerabilities Commitment to maintaining strong security practices

Apr 29, 2026

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Security Engineer at Toss | Seoul

Toss

Full-time|On-site|Seoul

Team and Collaboration The Security team at Toss brings together a range of professionals: CISO, Security Engineers, Security Researchers, Information Security Managers, Privacy Managers, and IT Managers. This group works closely with the Infra team, product development silos, Legal, and Compliance to build secure services for Toss. Members also connect with security peers across subsidiaries, sharing knowledge and collaborating on specialized areas. Working here means helping to build and improve security systems that support Toss in delivering reliable services. What You Will Do Design and operate AWS cloud security architecture, managing cloud security infrastructure such as CSPM and CWPP. Set up detection and response systems using logs, and automate security policies with IaC tools like Terraform. Manage IDS/IPS, WAF, and DDoS protection systems, addressing network vulnerabilities proactively. Design and refine detection policies through traffic and packet analysis, including regular expressions. Collect and respond to security events using SIEM/SOAR, and operate endpoint solutions like EDR and DLP to strengthen organizational security. Lead security design at the service architecture level and support technical compliance requirements. Requirements At least 5 years of experience as an in-house Security Engineer. Hands-on experience building and operating security systems in AWS cloud environments. Background in constructing and managing network security solutions (IDS/IPS, WAF) and capability in traffic and packet analysis, including optimizing detection policies. Experience with SIEM for event correlation analysis and developing threat hunting and response playbooks is preferred. Familiarity with endpoint security solutions such as EDR, AV, and DLP, as well as handling malware responses and configurations, is a plus. Technical experience with security certifications and financial regulations (ISO27001, PCI-DSS, ISMS-P) is advantageous. Resume Tips Describe previous roles with clear examples, emphasizing project contributions, technology stacks, and measurable improvements. Share how you approached and solved challenges, including your thought process. Include experiences where you identified and responded to security threats or resolved technical and managerial issues. Highlight specific cases where you learned and applied new security technologies or addressed emerging threats. Hiring Process Application Job Interview Cultural Fit Interview Reference Check Compensation Negotiation Final Offer and Onboarding Voices from the Team "I enjoy working with exceptional colleagues." One team member who joined after serving as the sole security officer at a previous company shared how building Toss's security infrastructure alongside the team has brought stability and a stronger security posture. This collaborative environment has become a source of pride as the team secures valuable assets together. Toss encourages setting personal goals every half-year, empowering team members to take ownership and collaborate with accomplished peers.

Apr 29, 2026

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HR Operations Manager at Toss Securities | Seoul

Toss Securities

Full-time|On-site|Seoul

Join Toss Securities as an HR Operations Manager! The HR Operations Manager will oversee the entire employee lifecycle from recruitment to departure, actively engaging in data organization, systematization, and enhancements at each stage. More than just an administrative role, you will design and maintain the HR operational structure. By analyzing compensation data and developing HR service platforms, you'll lead responses to regulatory bodies such as the Financial Supervisory Service and the Korea Financial Investment Association. As our organization scales rapidly from 500 to 2,000 employees, you will proactively identify challenges and build operational infrastructure to support business growth. About the Team You'll Join: The HR Operations Manager is part of the People Solution Partner Team within the People & Culture Division. You will collaborate closely with HR Business Partners, Regional Business Partners, and HR Consultants, while also communicating effectively with legal, finance, and compliance departments. Your responsibilities will include managing Workday-based HRIS operations, internal controls, and executive governance. Your Future Responsibilities: Understand the complete flow of HR operations from hiring to resignation, meticulously organizing and systematizing data, and continuously improving operational structures. Manage HR budgets, vendor contracts, and follow-up operations post-restructuring to ensure HR operations reliably support business growth. Maintain data integrity across HR systems like Workday, while identifying points for automation to enhance HR service platform efficiency. Accurately analyze compensation adjustments, manage HR dashboard data, and monitor working hours to provide insightful HR data analytics. Lead compliance with regulatory submissions to bodies like the Financial Supervisory Service and the Financial Services Commission. Oversee executive governance operations, including appointments, removals, board reporting, and electronic disclosures. We’re Looking for Candidates Who: Have over 3 years of practical experience in HR operations and are detail-oriented with a passion for organization and structure. Capable of running established processes reliably while also identifying areas for improvement, valuing both timelines and accuracy. Possess a mindset for efficiency and have experience in enhancing existing processes. Have strong data literacy skills to analyze HR data and are adaptable with automation tools, having explored new tools to improve work processes. Preferred Experiences: Experience in HR operations within financial regulatory industries such as securities firms, banks, or fintech is a plus. Experience managing SaaS-based HR systems like Workday is highly desirable. Application Process at Toss Securities: Application Submission > Job Interview > Cultural Fit Interview > Reference Check > Offer Negotiation > Final Acceptance and Onboarding Important Notes: Any discrepancies found in resumes or submitted documents, or verified disciplinary actions during employment history may result in cancellation of the application. Candidates who fall under hiring prohibitions or disqualifications as per Toss Securities regulations may have their applications revoked. Persons with disabilities and national veterans are given preference as per relevant laws during the application process. A Note to Future Colleagues: We are excited about the potential of working together and contributing to a thriving workplace culture.

Mar 10, 2026

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Security Audit Manager

Toss Bank

Full-time|On-site|Seoul

About the Team You Will Join The Security Division at Toss Bank consists of several teams: Security Policy Team, Privacy Protection Team, System Security Team, Network Security Team, Security Red Team, Security Blue Team, IT Service Team, and Security Audit Team. The Security Audit Manager will be responsible for conducting regular and ad-hoc audits as well as overseeing compliance checks across the organization within the Security Audit Team. This division collaborates with various teams to create safe and reliable services at Toss Bank. The Security Audit Team works closely with product teams and legal, compliance, platform engineering, and internal audit teams to ensure compliance and internal control. The Security Division is committed to providing secure electronic financial transaction services and strives to embed security into the daily operations of its users. Responsibilities You Will Undertake Conduct regular and ad-hoc internal audits of Toss Bank’s information security activities. Respond to periodic and ad-hoc audits conducted by the internal audit team and manage IT and security aspects of internal control accounting audits. Perform internal checks on information security responsibilities and self-audits. Improve internal controls related to information security. Assess compliance activities across the organization and enhance procedures as necessary. Conduct checks related to safeguarding personal credit information. Perform internal audits on significant information security incidents and penalties occurring within financial institutions. Ideal Candidate Profile Understanding of IT and information security fundamentals is essential. Experience in IT or information security audits and assessments is required. In-depth knowledge of information security regulations, such as electronic financial supervision regulations, credit information industry regulations, and standards for ensuring the safety of personal data, is desired. Ability to understand and enhance internal control measures related to information security. Familiarity with emerging technologies such as MSA, Kubernetes, and Cloud is a plus. Excellent communication skills to collaborate effectively with various teams are necessary. Possession of information security audit certifications (CISA, CISSP, etc.) is advantageous. Application Recommendations Share specific examples of experiences related to internal/external audits or internal controls relevant to the job responsibilities. Include experiences that demonstrate improvements in IT environments or information security practices through audit responses and self-assessments. If you have experience solving complex problems in collaboration with various organizations, be sure to highlight that. Journey to Join Toss Bank Application submission > Job interview > Cultural fit interview > Reference check > Offer negotiation > Final acceptance Please Note If any false information is found in your resume or supporting documents, or if any disciplinary action during your employment history is confirmed, your application may be canceled. Applicants who fall under the disqualifying criteria as per Toss Bank’s employment regulations may have their applications revoked. Individuals with disabilities or who are veterans will receive preferential treatment in accordance with relevant laws.

Mar 9, 2026

Security Engineer at Toss | Seoul

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