[5minlab] Client Programmer Internship

5minlab is seeking a Client Programmer Intern to join the team in Seoul. This internship offers practical experience working alongside seasoned professionals on active projects. Role overview As a Client Programmer Intern, you will contribute to ongoing development efforts and support the team in building client-side features. The role provides a chance to apply programming knowledge in a real-world setting. Learning and collaboration Interns will collaborate with experienced colleagues and observe how technical solutions are developed and implemented. This position offers exposure to industry practices and workflows. Location This internship is based in 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.

Emma Sleep is looking for an Operations Intern to join the team in Seoul. This internship centers on supporting daily operational tasks and contributing to projects that help streamline business processes. Role overview This position involves assisting with a variety of operational duties. The intern will work closely with team members to help improve workflows and support ongoing initiatives. What you will do Assist with daily operational tasks as assigned Contribute to projects aimed at optimizing processes Support the team in maintaining efficient operations Location This role is based in Seoul.

Expeditors International of Washington, Inc. is hiring an Air Import Agent in Seoul. This position centers on coordinating air freight imports and supporting smooth shipment processing from arrival to delivery. Role overview The Air Import Agent manages logistics for inbound air shipments. Timely handling and efficient processing are essential, as is maintaining service quality for clients. Attention to detail and strong organizational skills help keep shipments on track and compliant with regulations. Key responsibilities Coordinate air freight import shipments, monitoring progress and timelines Communicate with clients and partners to provide updates and resolve issues Ensure all activities comply with relevant regulations and company procedures Requirements Experience or interest in logistics or freight forwarding Clear communication and customer service skills Ability to manage multiple shipments and maintain compliance standards

Audemars Piguet is seeking a Logistics Specialist in Seoul to help strengthen supply chain operations. This position centers on managing logistics processes and supporting the timely delivery of products. Role overview This role focuses on coordinating logistics activities from shipment planning to delivery. The Logistics Specialist works closely with other departments to keep operations running smoothly and efficiently. What you will do Oversee logistics processes to support product flow Monitor and coordinate the timely delivery of goods Work with cross-functional teams to improve operational efficiency Location This position is based in Seoul.

The Central FP&A team at Toss, part of Viva Republica, connects financial analysis with strategic decision-making for the entire Toss community and its subsidiaries. This group works closely with finance teams across all subsidiaries, including FP&A, Accounting, and Tax, as well as product, business, IR, Corporate Development, and Legal teams. AI tools and automation play a key role in their daily work. What you will do Analyze monthly, quarterly, and annual performance to uncover insights that support business decisions. Investigate changes in key financial metrics, revenue, expenses, operating profit, and net income, down to the business driver level. Identify which business, product, or cost levers to prioritize to meet targets, proposing next steps and key questions for leadership. Model financial outcomes for new business initiatives, product launches, pricing changes, and investment decisions. Develop scenarios that consider impacts on profit and loss, cash flow, capital requirements, and tax, both for individual subsidiaries and the consolidated group. Present financial models that clarify assumptions and limitations, even when data is incomplete or uncertain. Lead the creation and management of annual and mid-to-long-term financial plans for the Toss community, integrating KPIs, budgets, and capital plans from each subsidiary. Translate annual plans for each subsidiary into actionable steps aligned with Toss’s long-term goals. Improve tools and processes to make analysis and reporting more efficient, using AI, dashboards, and automation to reduce repetitive work. Continuously refine financial models so they remain clear, robust, and easy to update as business complexity grows. Requirements At least 5 years of experience in FP&A, management accounting, strategy, corporate planning, or investment analysis. Strong financial modeling skills, with a solid grasp of how profit and loss, balance sheet, and cash flow connect for scenario analysis. Ability to spot discrepancies in financial data, understand root causes, and outline future options from a business driver perspective. Skill in turning complex or incomplete data into formats ready for decision-making. Proactive communication skills, with the ability to engage a wide range of stakeholders and build consensus. Creative approach to improving processes, not just following established methods but designing better ones. Preferred experience Background in tackling complex financial and strategic issues at professional firms such as Investment Banking, Strategy Consulting, or PE/VC, or within rapidly growing companies. Experience working with multiple entities or subsidiaries.

Toss Careers is hiring a Direct Sales Assistant for a short-term contract in Seoul. This position supports the sales team by helping with daily sales activities and client interactions. Role overview This role focuses on assisting with sales initiatives and providing support to reach team targets. The Direct Sales Assistant will work closely with both team members and clients, helping to keep sales processes running smoothly. What you will do Assist with various sales projects and campaigns Engage directly with clients as part of the sales process Support the sales team in meeting goals and deadlines Contract details This is a short-term contract role based in Seoul, ideal for those interested in building practical sales experience.

The Director of Product Management for Growth Marketing at Coupang guides the strategic direction of the company’s machine learning product suite. This position leads a team focused on using data-driven insights to improve customer acquisition and retention. Role overview This leadership role centers on defining the product vision and setting priorities for the roadmap. Collaboration with cross-functional teams is key to ensuring smooth and successful product launches. The work involves developing solutions that support Coupang’s growth goals, relying on a blend of product management and marketing expertise. What you will do Lead and develop a team working on machine learning products for growth marketing Define the vision for new and existing products Prioritize initiatives and manage the product roadmap Work closely with teams across the company to launch products effectively Identify new market opportunities and analyze competitors Apply best practices in product development Requirements Experience in product management and marketing Strong background in using data to drive decisions Ability to lead teams and collaborate across functions

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

The Toss Server Team builds and maintains the core systems that keep Toss services running smoothly. As a Server Developer focused on the Messaging Platform, the work centers on supporting reliable communication across a range of customer touchpoints and affiliated companies. This role sits within the Platform Chapter, which develops shared libraries, gateways, and messaging systems. The team also maintains frameworks for logging, metrics, and other common features, enabling fast and stable service development. There is flexibility to move between chapters (Product, Platform, Productivity) after joining, matching evolving skills and interests. What you will do Build and manage messaging systems for customer communications, including push notifications, alerts, and emails. Support experimental systems for A/B testing within Toss services. Implement unified messaging solutions across affiliated companies, such as banks and securities firms. What we look for Experience designing, developing, and operating messaging systems. Background in building highly available and scalable systems. Ability to identify and resolve operational challenges in complex environments. Technologies in use Kotlin, Java, Spring MVC, Spring Boot JPA/Hibernate, MySQL, MongoDB, Redis, Kafka ELK, Prometheus with Thanos, Grafana Application tips Describe your experience with Toss's technology stack and the scale of traffic you have handled. Share examples of optimizing performance for high-traffic applications. If you have worked in mission-critical environments and taken responsibility for reliable services, highlight those experiences. Hiring process Application submission First round technical interview (30 minutes) Second round technical interview Cultural fit interview Reference check Salary negotiation Final acceptance and onboarding

Zscaler, Inc. is seeking an Enterprise Account Executive based remotely in South Korea. This role centers on building relationships with enterprise customers and guiding them through the adoption of Zscaler’s cloud security solutions. Role overview The Enterprise Account Executive develops and executes sales strategies for large organizations. The position involves engaging directly with C-level executives, listening to their priorities, and recommending security solutions that fit their specific needs. Key responsibilities Drive sales efforts for enterprise accounts across South Korea Meet and exceed sales targets by identifying new opportunities and expanding existing relationships Collaborate with internal teams to deliver tailored solutions for each customer Communicate Zscaler’s value proposition to decision-makers and key stakeholders Collaboration and impact This is a remote position with opportunities to work closely with cross-functional teams. The role plays a key part in supporting customers’ cloud transformation journeys and contributes to Zscaler’s growth in the security industry.

This is a full-time position. Start dates: Immediate or 2026 Role overview The Bilingual Client Service Associate, SEL/LON Transfer Program (Korean/English) offers a structured path to launch a commercial career at AlphaSights. This program combines hands-on training in Seoul with a long-term placement in London, providing exposure to global business practices and client engagement. Program structure Phase 1: Seoul (3–6 months) , Begin in the Seoul office, where in-depth training covers project management and high-impact sales. Hands-on coaching helps build a strong foundation in AlphaSights’ business. Phase 2: London (18 months) , Transition to the London office to further develop skills and advance your career within the company. What you will do Engage with clients and colleagues across multiple regions using Korean and English. Work on project management tasks and support high-impact sales initiatives. Collaborate with a diverse, driven team to deliver results under tight deadlines. Build business acumen by working with clients from investment funds, consultancies, and Fortune 500 companies. Who thrives here Individuals who perform well in results-driven, deadline-oriented settings. Those who are resilient and motivated to take initiative. People eager to use multilingual skills and work with an international team. Candidates who want to develop a broad understanding of various industries. Requirements Fluency in Korean and English. Work authorization in Korea is required.

Sika AG is seeking a Sales Representative focused on Automotive Original Equipment Suppliers (OES) in Seoul. This position centers on building strong relationships within the automotive sector and supporting customers throughout the sales process. Role overview The Sales Representative will work directly with industry stakeholders, helping to identify client needs and present solutions that fit their requirements. The goal is to drive sales growth while maintaining high levels of customer satisfaction. What you will do Engage with automotive OES clients and industry partners Understand client requirements and recommend appropriate solutions Support the sales cycle from initial contact through to closing Requirements Experience or interest in the automotive sector Strong communication and relationship-building skills Ability to understand and address customer needs

Sika AG is seeking a Finance & IT Controller in Seoul. This position combines oversight of financial operations with a focus on improving processes through technology. Role overview The Finance & IT Controller manages day-to-day financial activities and works to strengthen reporting systems. Collaboration with multiple departments is central to the role, ensuring financial data and IT systems work together smoothly. What you will do Manage and monitor financial operations Use technology to improve reporting and operational workflows Work with teams across the company to integrate financial data with IT systems Support efforts to increase efficiency and accuracy in financial reporting

Sika AG is hiring a Human Resources Manager in Seoul. This position plays a central part in shaping the company’s workplace and supporting its people. Role overview The Human Resources Manager oversees a broad range of HR functions. This includes managing talent acquisition, supporting employee engagement efforts, and ensuring the company complies with local labor laws. The role requires both strategic thinking and attention to detail in daily HR operations. Key responsibilities Lead recruitment and hiring processes Promote employee engagement and a positive workplace culture Monitor and maintain compliance with labor regulations What we look for Experience in human resources management Strong understanding of labor laws and HR best practices Ability to build relationships and support organizational culture

42dot is seeking a Senior Business Performance Manager based in Pangyo (Software Dream Center), South Korea. This position centers on improving business strategies and refining performance metrics across the organization. Role overview As Senior Business Performance Manager, you will work closely with teams from various departments. The focus is on using data to inform decisions, making processes more efficient, and encouraging ongoing improvement throughout the company. What you will do Collaborate with cross-functional groups to support data-driven decision making Streamline business processes to improve efficiency Promote a culture of continuous improvement Identify opportunities for growth and operational optimization Requirements Strong analytical skills Leadership experience in business performance or a related field

Coupang is seeking a Senior Account Management Specialist to join the Advertising team in Seoul. This position centers on supporting clients and helping them reach their advertising goals. Role overview This role focuses on understanding client needs, developing tailored advertising strategies, and working to maximize campaign effectiveness. Building strong relationships with clients is a key part of the job. What you will do Collaborate with clients to identify their advertising objectives and challenges Develop and recommend advertising solutions that align with client goals Monitor campaign performance and optimize for better results Requirements Experience in digital advertising or account management Strong communication and relationship-building skills Ability to analyze client needs and propose effective solutions

Toss Securities is seeking an IDC Infrastructure Engineer (Network & System) to help build and maintain the backbone of our data center operations in Seoul. This position focuses on ensuring the stability, efficiency, and continuous improvement of our large-scale infrastructure, covering everything from network design to physical equipment and operational processes. The role is primarily based at our modern data center (IDC), working closely with a team of network and system engineers. What you will do Design hardware architectures for network and server infrastructure, including equipment selection and implementation standards. Develop data center network architectures (such as Spine-Leaf and redundancy) and server/storage configurations. Define technical standards for bandwidth, NIC specifications (10G/25G/100G/400G), cabling (OM, LR/SR, MPO), and switch port setups. Plan physical infrastructure, taking into account rack space, power, and environmental needs. Set and manage organization-wide standards for equipment models, firmware, and configuration templates. Install, configure, and operate servers, storage, and network equipment on site, driving ongoing improvements. Oversee equipment transport, installation, and relocation, ensuring quality and safety throughout the process. Coordinate with contractors for cabling and equipment setup, maintaining technical standards and quality control. Monitor the IDC environment (power, temperature, network, equipment status) and respond proactively to anomalies. Lead first-level incident response and root cause analysis, working to prevent recurrence and resolve complex issues across network, system, and physical layers. Manage the lifecycle of IDC assets, ensuring data integrity and optimizing long-term operational plans for capacity, power, and space. Collaborate with colocation service providers and partners to manage schedules, quality, and costs. Automate repetitive operational tasks, such as firmware upgrades and configuration deployments, and build monitoring/CMDB integrations using SNMP and REST API. Establish and refine operational standards, procedures, and policies for ongoing efficiency. Requirements At least 5 years of experience in data center (IDC) or infrastructure design and operations. Experience designing data center network architectures (Spine-Leaf, redundancy, etc.). Understanding of server/storage hardware and operating systems (Linux, Windows, Hypervisor). Ability to design at the hardware level, with knowledge of NICs, cabling, and switch ASICs. Experience with IDC space planning, rack layout, power, and space design and operations. Background in large-scale equipment installation, relocation, and asset management within IDC operations. Problem-solving skills that address both physical and logical aspects of incidents. Strong communication skills for effective collaboration with contractors and internal teams. Experience with equipment implementation proof-of-concept (PoC), vendor evaluation, and performance validation. Proven ability to create infrastructure standard documents, such as design guides and operational procedures.

aumovio is looking for a Material Planner (자재/구매관리) to help manage and improve the material supply chain at our Sejong location. This position centers on forecasting material needs, maintaining inventory, and working closely with suppliers to ensure timely deliveries. What you will do Forecast material requirements based on production plans and business needs Monitor and maintain optimal inventory levels Communicate with suppliers to coordinate orders and resolve issues Collaborate with other teams to address supply chain challenges What we look for Strong organizational skills and attention to detail Ability to solve problems proactively Comfort working with cross-functional teams

aumovio is seeking a Sub Project Manager for Optical Development with a focus on Head-Up Display systems. This position is based in Sejong and centers on guiding optical projects from start to finish. Role overview The Sub Project Manager will oversee the progress of optical development initiatives, particularly those related to Head-Up Display technology. The role involves close coordination with cross-functional teams and maintaining alignment across different project areas. Key responsibilities Manage project timelines to ensure milestones are met Coordinate activities among engineering, design, and other involved teams Facilitate clear communication between stakeholders throughout the project lifecycle Monitor project quality and address issues as they arise Collaboration This role requires regular interaction with various departments and stakeholders to keep projects on track and deliver high-quality results in optical development for Head-Up Displays.