TCP Server Developer at Toss Payments | Seoul

Join Our Dynamic Team!The Server Developer (Product) role is part of Toss's innovative Silo team, comprising 6-8 diverse professionals, including product owners, designers, developers, and data analysts, collaborating like a startup with autonomy.As our user base grows, we have dedicated server developers ensuring stable operations. Unlike silo teams focusing on rapid experimentation, this role supports a variety of services across Toss.Your Responsibilities Include:Designing and developing the Product server used daily by countless Toss customers.Offering over 50 services since the inception of our convenient remittance service in 2015, including financial status checks, pedometers, and fortune quizzes.Utilizing trendy technologies to ensure services run smoothly while listening to user feedback to quickly and flexibly resolve issues.We Are Looking For Individuals Who:Have experience designing and operating high-availability, scalable systems.Possess a background in developing systems that handle large-scale real-time traffic.Have faced challenges and resolved issues during system failures.Are passionate about their services and approach their work with a sense of ownership.Enjoy sharing insights and ideas gained from service development and are eager for ongoing technical challenges.Services You Will Contribute To:Loans: Create services that allow users to easily compare and apply for various loans, expanding offerings such as personal loans, mortgage loans, and card loans to ensure Toss is top of mind.Marketplace: Develop essential services for users, like card benefit comparisons, investments, and auto insurance.Payments: Work on Toss's convenient payment system, TossPay, handling everything from online and offline payments to new payment method development and promotional activities.Commerce: Enhance Toss's commerce services to create value for both users and sellers, including group purchases and admin services for sellers.Benefits: Develop innovative services in the app tech space, including pedometers, live shopping, luck lotteries, and collaborative point-earning activities.Ads: Expand Toss's advertising business by reliably serving high-traffic products and developing integrations for ad networks.Home: Create services for the homepage that first engages Toss users, analyzing assets, income, and spending patterns while connecting them to relevant Toss services.

Join Our Team! At Toss Securities, our Server Chapter is filled with enthusiastic colleagues who are eager to collaborate and create meaningful advancements. We thrive on constructive discussions and innovative problem-solving, where every idea is valued, and constructive criticism is encouraged. We enjoy engaging in technical discussions and hold various study sessions. Whether you're new to the field or an experienced professional, you'll find opportunities to expand your knowledge and apply what you've learned in practical ways. Our active code review process ensures that you gain hands-on technical expertise. As a Server Developer at Toss Securities, you'll work across various teams, including Product Owners, Designers, Frontend Developers, and Data Analysts, in a dynamic environment similar to a startup. You'll also engage with specialized teams managing core financial data and ensuring the stability of our services. We are dedicated to developing back-office products that alleviate the inconvenience of visiting physical locations, creating a seamless experience for our users. Worried about communication with fellow developers across different teams? Don't be! Our community supports strong collaboration through code reviews, Engineering Days, and weekly Server Chapter meetings. Your Responsibilities We primarily utilize Java/Kotlin and the Spring Framework for server development. You will engage in selecting and standardizing efficient development practices and libraries. You will also focus on improving our architecture for easy deployment and maintenance, ensuring stability and performance. Working with technologies like Redis, Kafka, Kubernetes, and ELK, you'll tackle challenges related to high traffic and concurrent processing. You will be responsible for creating various aspects of the Toss Securities service, from real-time data processing to managing user account information and stock transactions. You will have ownership of your product areas and will make key technical decisions. Who We Are Looking For We seek individuals who are persistent problem solvers. You should be comfortable tackling complex challenges and delivering valuable solutions for our customers. A broad mindset is essential, as we sometimes need to take bold steps to simplify issues. We value individuals who are open to collaboration and are willing to take initiative, even when responsibilities may not be clearly defined.

Join Toss Income, a newly established subsidiary of the Toss community, focusing on innovative financial services related to income.Toss Income aims to enhance financial experiences by addressing challenges in the tax domain, which, while not a daily financial service, is a crucial aspect of financial life.We are dedicated to alleviating the difficulties individuals face in managing their taxes through services like 'Finding Hidden Refunds.'As part of the newest branch of Toss community, you will have the opportunity to be an initial member and shape our team.The team you will join comprises self-sufficient units known as silos, which include product owners, designers, developers, and data analysts, functioning like small startups.As our user base expands, we require server developers who can ensure stable operations while supporting various services at Toss.Your responsibilities will include:Designing and developing the servers for services utilized by Toss Income customers.Ensuring the stability of Toss Income services while swiftly addressing issues based on customer feedback.We are looking for individuals who:Have experience designing and operating high-availability, scalable systems.Possess a background in developing systems capable of handling large-scale real-time traffic.Have encountered and resolved system failures.Take pride in their work and approach it with a sense of ownership.Are eager to share insights and ideas gained from service development and continuously seek technical challenges.We recommend structuring your resume to highlight:Your experience in developing systems capable of handling high traffic quickly and reliably.Specific improvements you've made based on problems you've identified, detailing the technology stack used.Participation in the initial stages of service development.Experience in developing B2C services based on the Spring Framework.Technologies used at Toss Income include:Kotlin, Java, GradleNetty, Spring MVC, Spring Webflux, Spring Boot, Spring Cloud Gateway, Spring Cloud ConfigJPA/Hibernate, MySQL, MongoDB, Hadoop, Redis, Memcached, etc.

Join Our Dynamic Team! At Toss Bank, we focus on evaluating potential through the quality of your experiences and the expected growth in your career, rather than just years of service. About the Team You Will Join Our squads consist of 1-3 Frontend Developers collaborating closely to foster both service development and personal growth. As a service-oriented squad, we operate with autonomy, with teams ranging from 4 to 15 members, akin to small startups. The Frontend chapter at Toss Bank collaborates like a cohesive unit, sharing new technologies and development expertise through weekly meetings. Want to learn more about our Frontend chapter?→ *We are building a bank on the web*(https://toss.im/career/article/tossbank-frontend-interview) Curious about the growth opportunities after joining?→ *A week in the life of a Toss Bank Frontend Developer*(https://toss.im/career/article/tossbank-frontend-oneweek) Your Responsibilities You will develop a wide range of services, from internal operating systems to customer-facing financial services like account creation, card applications, savings, and loans. Enhance productivity by building libraries and automation tools, continuously improving the frontend development environment for optimal user experience. You will also work on common services like the Toss Bank homepage and corporate user services. Who We Are Looking For Individuals with experience in server-side rendering (SSR) and developing web applications within mobile apps. Passionate developers who enjoy understanding user flows deeply and enhancing user experiences for greater convenience and efficiency. Proactive problem solvers who can articulate and share their ideas logically. Those interested in automating and improving Frontend Operation systems (CI, CD, etc.). The Services You Will Manage You will create financial services such as savings, loans, credit cards, funds, and asset management that users directly engage with, including innovative products like 'Group Savings' and 'Grow Savings'. Take responsibility for the entire process from credit evaluation to card issuance and user experience, while driving growth through data-driven experiments that enhance MAU, profitability, and customer satisfaction.

Join Our TeamThe Server Developer (Product) is an integral part of Toss's Maker Organization, Silo. Within each Silo, a diverse team of 6-8 professionals, including product owners, designers, developers, and data analysts, collaborates with autonomy, akin to a small startup.As our user base expands, our dedicated team of server developers ensures stable operations, supporting various services across Toss, distinct from the rapid experiments conducted within the Silo.What You'll Be DoingDesigning and developing the Product server, utilized daily by countless Toss customers.Offering over 50 diverse services since the launch of our easy remittance service in 2015, including financial status inquiries, pedometers, and luck quizzes.Implementing cutting-edge technologies to ensure service stability while promptly addressing user feedback and issues.Who We're Looking ForIndividuals with experience in designing and operating high-availability, scalable systems.Professionals with a background in developing systems that manage large-scale real-time traffic.People who have faced and resolved system outages effectively.Passionate individuals who treat the service as their own, embodying a sense of ownership.Collaborators eager to share insights and ideas gained from service development, constantly seeking technical challenges.Services You Will HandleLoan: Create services that allow users to easily compare various loans and manage them efficiently. We aim to be the go-to choice for credit loans, mortgage loans, refinancing loans, and card loans.Marketplace: Develop essential services, such as credit card benefit comparisons, investments, and auto insurance, for financial users.Payment: Work on Toss's simple payment service, TossPay, handling everything from online and offline payments to new payment method development and user acquisition promotions.Commerce: Enhance Toss's payment capabilities through commerce initiatives, launching group-buying and seller admin services to create value for both users and sellers.Benefits: Lead the creation of innovative services in the benefits tab, including pedometers, live shopping, lucky lotteries, and point rewards for friends.Ads: Expand Toss's advertising business, developing stable-serving products that handle large traffic volumes while integrating ad network developments.Home: Create services related to the home screen, the first touchpoint for all Toss users, analyzing assets and expenditures while connecting users to other relevant Toss services.

About the Team You'll JoinThe Server Developer (SRE) is an integral part of the server platform team.Toss typically operates with small, feature-based silo teams comprising planners, designers, and developers. The server platform team is responsible for creating common functionalities and frameworks needed across these silo teams.This year, the server platform team aims to enable quicker and smoother launches of securities services while ensuring their stable operation, with plans to expand many more services in the future.Unlike silo teams, there are no separate planners in the server platform team. Engineers within the team take on the roles of both planners and developers, actively contemplating necessary features, gathering feedback, and determining the direction for development. Responsibilities You Will Have Establishing preventive measures and responding to incidents for stable services.Design and operate response processes to minimize service impact during incidents, ensuring rapid response.Analyze root causes (RCA) of incidents, enhance pre- and post-detection capabilities, and build systems to shorten recovery time and prevent recurrence. Ensuring service visibility and availability.Achieve visibility across infrastructure, networks, and Kubernetes environments, linking it to actual service metrics.Establish SLOs to clearly define problem situations, continuously enhancing the alert system with necessary metrics.Proactively identify potential bottlenecks in components in anticipation of traffic increases and improve structures. Conducting in-depth analysis of issues and identifying root causes.When service disruptions occur, analyze beyond logs, utilizing eBPF, memory, network, and kernel areas for comprehensive root cause analysis.Precisely analyze internal application behavior to provide optimal resource configuration guidelines to developers. Automating operations and developing internal tools.Automate repetitive analytical tasks and identify areas that hinder operational efficiency, developing tools for improvement.Automate testing environments to enhance service reliability and provide easy access for colleagues.

Join Our TeamAs a Product Server Developer at Toss, you will be one of the pioneering members of our team, gaining diverse experiences as we venture into the offline payment industry.We are excited to shape the history of payment systems, innovating the payment ecosystem with enthusiasm.You will collaborate with various colleagues, including Business Development Managers, Purchasing Managers, and Hardware Engineers, to successfully launch top-tier payment devices.Your ResponsibilitiesDesign and develop product servers that create digital innovations in the offline payment market, providing beautiful payment experiences.Handle all aspects of system service design and operations to ensure we deliver utmost value.Utilize cutting-edge technologies to maintain stable service operations, swiftly addressing user feedback and challenges.Ideal CandidateYou have experience designing and operating high-availability, scalable systems.You possess a background in developing systems that handle large-scale, real-time traffic.You have faced and resolved system failures, demonstrating your problem-solving skills.You approach your work with a strong sense of ownership and dedication, treating the service as 'your own'.You enjoy sharing insights and ideas gained from service development and are eager to embrace continuous technical challenges.Resume TipsDetail your experience in developing solutions that efficiently and reliably handle high traffic volumes.If you have proactively identified and improved issues, please specify the technologies used and the extent of improvements.Include any experience you have in participating in the early stages of service development.Experience in developing B2C services based on the Spring Framework is a plus.Technologies We UseKotlin, Java, GradleNetty, Spring MVC, Spring Webflux, Spring Boot, Spring Cloud Gateway, Spring Cloud ConfigJPA/Hibernate, MySQL, MongoDB, Hadoop, Redis, Memcached, ZookeeperKubernetes + Istio, Haproxy, NginxGoCD, ArgoCD, Consul, Vault, Git, Docker, Spinnaker, Jenkins, Ceph, HarborKafka, ELK, Prometheus + Thanos, InfluxData, Grafana

Join us in creating the ultimate user experience!Are you passionate about designing exceptional financial services that provide intuitive and delightful experiences for everyone? At Toss, you’ll be a key player in shaping the user experience of our beloved Toss app, which is cherished by 17 million monthly users.From money transfers to seamless payments and shopping, we are setting new standards in user experience across diverse services.Ready to make history in finance? Apply now at Toss!############# About Toss- We are responsible for the user interface and experience of the leading financial platform with the highest active user count, integrating services across all our subsidiaries.- Experience the impact of your designs as they reach 17 million customers.- We create experiences that resonate with users’ daily lives, from financial products like loans and transfers to shopping and lifestyle applications.- Our designs ensure a harmonious integration of various services and features throughout the Toss ecosystem.# How Toss Product Designers Work- As the sole designer for products, you will proactively design and make decisions for all user interfaces.- No need for separate approvals. As a Product Designer, you hold the utmost responsibility and authority over user experience.- Each silo consists of 6 to 8 team members, allowing you to make independent decisions much like joining a small startup!- Your primary focus will be solving user problems, collaborating with top experts in research, writing, and graphics.- Collect qualitative and quantitative feedback on customer pain points and continuously improve to deliver the best experiences while also considering business growth.# We Are Looking For Someone Who- Has experience in improving user-centric solutions based on quantitative and qualitative data.- Can design and launch solutions in the market based on this understanding.- Possesses the ability to create clear and visually appealing App and Web UI.- Can logically persuade team members and collaborate effectively for an unparalleled customer experience.- Is capable of evaluating and refining their designs through data analysis.- Actively shares learning and contributes to a growth-oriented environment for designers.- Financial industry experience is not required. We welcome individuals eager to grow together!# Important Application Information- Product Designer candidates can apply in **two ways** by clicking the 'Apply' button.>- **Quick Application without a Portfolio**: Just one well-articulated example of your capabilities is enough. Prepare responses to five questions provided by Toss and apply without a portfolio file.>- **Apply with an Existing Portfolio**: If you have a portfolio ready, feel free to submit it with your application.>- Regardless of the method chosen, the evaluation criteria remain the same.>- In both rounds, during the job interview, you will discuss two selected examples in depth, so be prepared for additional presentation materials regardless of portfolio submission.>- After acceptance, the silo you will join will be determined, working on various products from new ventures to existing businesses.# Recommendations for Portfolio and Responses- Document your thought process in solving user problems from their perspective.- For product improvement projects, include images showing the before (as-is) and after (to-be) states for clarity.- Highlight any creative and innovative problem-solving approaches, rather than sticking to standardized solutions.# Joining the Toss Journey- Application Submission > Job Interview > Cultural Fit Interview > Reference Check > Compensation Discussion > Final Acceptance

#LI-DNIAbout the Team You'll JoinThe Android Developers at Toss are embedded within a matrix structure, collaborating across silos and within the Android chapter.At Toss, services and products are developed within silo units consisting of 6-8 diverse roles, fostering an autonomous startup-like environment.In addition to silos, there are teams focused on developing shared modules within the Android codebase, engaging in deep technical discussions.Every Thursday, the Android chapter members gather for Engineering Day outside of silos, encouraging active knowledge exchange, technical discussions, and collaborative code reviews.As an Android Developer at Toss, you will have the opportunity to propose and implement new technologies alongside talented peers.Your ResponsibilitiesDevelop all Android app services for Toss, including remittance, account inquiries, credit checks, and Toss Card.Create innovative financial services such as Toss Bank and Toss Securities.Experience rapid iterations, releasing new features weekly to over ten million users.Utilize Toss's unique design system, TDS (Toss Design System), to complete UI in just one minute, allowing you to focus solely on core logic.We’re Looking For Someone WhoHas experience in developing commercial services.Is proficient in Kotlin development.Possesses a strong understanding of Android UI/UX guidelines.Resume RecommendationsShare experiences where you took initiative and responsibility for product quality and stability, continuously improving them.Highlight experiences where you immersed yourself in understanding technology and domain to add value to customers’ lives.If you aim for optimized interface design based on a deep understanding of Android and mobile in general, you are a great fit.Technologies We UseKotlinRxJava, Kotlin CoroutinesView System, Jetpack ComposeTDS (Toss Design System)Model-View-WhateverYour Journey to Joining TossApplication Submission > Pre-Task Assessment > Job Interview

Welcome to Toss PaymentsToss Payments is committed to understanding the challenges and inefficiencies businesses face, aiming to provide comprehensive solutions across technology and operations. Our goal is to deliver a seamless and convenient service experience for consumers while creating an environment where merchants can focus solely on their business.We work under the principle of 'innovating the electronic payment market', fostering a culture of mutual trust and collaboration. We are looking for colleagues who are eager to help shape the future of the payment industry!About the Team You Will JoinThe Frontend Developer position at Toss Payments is part of both the product team and the frontend chapter. Within the product team, you will collaborate with Product Managers, Product Designers, Server Developers, and fellow Frontend Developers to tackle complex projects in the payment domain, creating sustainable and high-quality services over time. You will have the opportunity to refine and specify the products that leverage your strengths during the interview process.The frontend chapter operates like a cohesive team! We hold regular chapter meetings and share new technology topics or development insights during 'Lightning Talks.' Participate in mob programming, interface design reviews, and various challenges that encourage continuous growth!This year, the frontend chapter aims to scale significantly to support the smooth operation of Toss's growing business.What We Have Accomplished So FarWe developed the payment widget to enable anyone to easily create their desired payment experience after thorough consideration.We designed and applied an intuitive and scalable payment SDK architecture that meets numerous requirements.We are enhancing dashboards and admin products to effectively address the complex policies and management elements from merchant contracts to payments and settlements.Beyond product development, we take the lead in reducing various inefficiencies within the company through the establishment of testing automation platforms, design standardization, and sharing development capabilities.Future Challenges We Want to Tackle TogetherWe look forward to crafting products that flexibly accommodate complex requirements. We are already applying technical challenges to effectively manage complexity in the payment domain while maintaining scalability. However, to drive these goals forward, we need more teammates to support us.We aim to completely eliminate accumulated legacy.The long-standing electronic payment market has not been without its technical debt. We are seeking individuals who can analyze areas that are hard to control or manage, rapidly reconfigure them with new technologies, and help create an environment where the business can grow swiftly.Who We Want to Work WithIndividuals who place high value on developer experience.Those who understand and practice the importance of automated testing.Enthusiasts of new technologies and various platforms.Individuals keenly interested in programming languages.Those who find joy in simplifying complex business challenges.Experience We ValueExperience with static type analysis using TypeScript or Flow is a plus.Experience in server-side rendering (SSR) and web app development within mobile applications is a plus.Experience in UI development considering responsive design, web accessibility, and web standards is a plus.Experience in test and deployment automation is a plus.Experience in configuring the operational infrastructure of web services or creating product monitoring systems is a plus.

Join Our Team!As a Node.js Developer at Toss Securities, you will be part of the Automation Platform Team.The Automation Platform Team is dedicated to creating and managing customer-facing services that provide a unique experience for users of Toss Securities, along with internal services that support these offerings.Your role will involve designing and implementing a range of automation platforms that help employees and customers shift their focus from repetitive tasks to more valuable work. What You Will Do:Develop Node.js-based applications that operate in diverse environments, including server and client-side applications.Write libraries and test code to create stable and observable services. We Are Looking For:A candidate with a deep understanding of Node.js, TypeScript, and Nest.js, or someone with ample practical experience in other server-side environments (like Spring) who is ready to transition to the Node.js ecosystem.Experience in designing and operating distributed applications, with the ability to define and resolve issues related to concurrency, atomicity, and parallel processing.Familiarity with log collection and monitoring for stable service operations.Ability to write flexible, readable, and maintainable code.Skills in identifying repetitive or inefficient processes and proposing better alternatives. Resume Tips:Describe challenges encountered during projects and how you solved them.Summarize your thoughts on good coding or design philosophy. Technologies Used at Toss Securities:Typescript, NestJS, pnpm, VitestELK Stack, ZooKeeper, Redis, Kafka

About the Role Toss is looking for a Frontend Developer in Seoul to help build and improve web applications. This role works closely with designers and backend engineers to deliver smooth, effective user experiences. The team values modern frontend development and keeps up with current technologies. What You Will Do Develop and maintain web applications for Toss products Work with designers to translate UI/UX designs into functional interfaces Collaborate with backend developers to integrate APIs and data Use current frontend tools and frameworks as part of daily work Location This position is based in Seoul.

Join Our Innovative TeamAs a Product Owner at Toss Securities, you will become part of a dedicated product organization known as a 'silo'. This agile team comprises 6-8 professionals, including fellow POs, developers, product designers, and data analysts, all working together with the autonomy of a small startup, making independent decisions regarding product development.In your role, you will connect user needs with Toss Securities' business strategy, creating accessible investment services that enhance customer experiences.Your responsibilities will span the entire product lifecycle, from defining key metrics and designing business models to driving action items and achieving tangible results.You will establish valid hypotheses, validate them through experimentation, and leverage data insights to refine the product, ensuring a strong Product-Market Fit.As a leader, you will set goals and strategies for business direction, revenue, and profits, engaging in thorough discussions with your silo team to determine the best course of action.This role is akin to being a CEO of a small startup—addressing challenges head-on, defining problems, and experiencing the highs and lows of entrepreneurial ventures.Your responsibilities extend beyond the launch of new financial products; you will also work on cross-activation services, create community platforms, and develop asset management services.Ideal Candidate ProfileWe prefer candidates with a profound understanding of mobile products over securities domain knowledge, as Toss Securities operates with a tech-first mentality.Experience depth may not correlate directly with years; we do not impose strict experience limits.Relevant experience in an agile environment, delivering meaningful business and product outcomes through both success and learning from failures is essential.An analytical mindset is crucial for solving diverse and complex challenges using data.Experience in defining problems from a user perspective and implementing solutions is highly valued.Founders with A to Z experience in startups, from business/product planning to organizational operations, will find this role particularly appealing.Resume TipsClearly outline the problems defined, hypotheses established, actions taken, and results achieved for each product/service/project you have handled.Highlight impactful experiences and learning points instead of simply listing tasks to showcase your strengths.Ensure your resume reflects your ability to drive product success and learning effectively.

Join us as a Technical Product Owner specializing in AI!The Technical Product Owner at Toss is a vital part of our team, driving the success of technology-driven products across various services.This role focuses on rapidly experimenting with AI/ML-based features and connecting them with real user experiences.Your responsibilities will include:Leading the end-to-end planning and improvement cycles of ML-based products.Defining and executing how technology should function in areas like recommendations, rankings, search, and personalization.Collaborating closely with Data Scientists and ML Engineers to bridge technology and product.Defining business impact, designing metrics, and enhancing products through A/B testing and iterative processes.Designing AI-driven user experiences, business structures, and technical architectures with a long-term perspective.We are looking for someone who:Has practical experience designing and operating machine learning-based products or systems.Possesses strong interest or experience in various ML applications such as recommendations, rankings, predictions, search, personalization, demand forecasting, and ad optimization.Has experience leading complex and uncertain tasks to completion.Can create incremental outcomes while considering both business impact and technical feasibility.Resume Tips:Clearly outline the flow from problem definition to solution generation, stakeholder collaboration, and final results for each product, service, or project.Instead of merely listing duties, highlight your achievements and insights gained throughout the process.Journey to join Toss:Application submission > Job interview > Cultural fit interview > Reference check > Compensation negotiation > Final acceptance and onboarding.“We are a team genuinely committed to delivering the best results to our users right now.”Recommendations, searches, and rankings are not merely technical problems.We need to design and solve complex issues involving customer context, our business strategy, and real-time data flows.There are no absolute answers, and we must always validate through A/B testing. Hence, this team speaks through experiments rather than opinions and metrics rather than assertions.If you love technology and want to lead the transformation of that technology into real user experiences and metrics, you will find exciting opportunities here.

About the Domain You'll Join Toss is composed of several domains that operate as independent businesses, including Growth, Foundation, Commerce, Pay, Financial Marketplace, and Ads & Benefit. The Growth domain is designed to drive an increase in Toss app users and generate higher revenue per user. To propel Toss's growth, it is essential to not only attract new users but also encourage existing users to utilize more services within the app. You will be responsible for analyzing and improving existing services while also creating new services that contribute to user growth. Your Responsibilities Design and develop the product server utilized by numerous Toss customers. Establish valid hypotheses and validate them through experiments, utilizing data insights to progressively enhance product-market fit. Leverage trendy technologies to ensure stable service operation, while listening to user feedback to quickly and flexibly resolve issues. What You Should Note This position is aimed at individuals interested in creating new services that drive growth. While it shares similarities with the existing Server Developer (Product) role, it will specifically place you in the Growth domain. If you wish to have flexibility in your placement based on your strengths, consider applying for the [Server Developer (Product)](https://toss.im/career/job-detail?job_id=4071141003) position. Please note that Toss is not hiring individuals eligible for military service exceptions (industrial personnel, research personnel) at this time. Who We Are Looking For Individuals with experience in designing and operating high-availability scalable systems. Developers who have experience in creating systems that handle large-scale real-time traffic. Those who have encountered and resolved issues during system outages. Individuals who are passionate about their services and approach their work with a sense of ownership. Collaborative team players who are eager to share insights and ideas gained from service development, constantly seeking technical challenges. Technologies We Use at Toss Kotlin, Spring MySQL, MongoDB, Hadoop, Redis, Kafka, Elasticsearch The Journey to Join Toss Application submission > Functional interview > Cultural fit interview > Reference check > Offer negotiation > Final acceptance and onboarding A Note for Future Colleagues "Let's achieve explosive growth together in the Growth Domain!" The Growth domain is the ideal environment for those who love products and believe in the importance of analysis. You'll have plenty of opportunities to advance your career alongside outstanding makers. Creating value through deep analysis leads to daily dynamism and excitement in the Growth domain, with metrics like MAU and ARPU providing immediate feedback on your impact.

About the Team You'll Join* As a Cloud Engineer (Cloud Platform Development) at Toss, you will be part of the Cloud Engineering Team, responsible for addressing and resolving issues within the Toss service infrastructure through a Cloud Native approach.* Joining this position means becoming a vital member of the Cloud Engineering Team.* Our goal is to optimize the infrastructure for Toss team members, ensuring a resilient system capable of handling large-scale traffic and preparing for potential failures.Your Responsibilities* Beyond utilizing cloud services, you will design, operate, and enhance them directly.* Analyze the infrastructure from a Cloud Engineer's perspective, providing solutions based on Kubernetes and OpenStack.* Implement features for performance optimization and operational automation of virtual infrastructure.* Develop monitoring, metering, and alerting systems to support the stability and efficiency of services at the virtual infrastructure level.* Adapt and improve open-source software for an in-house environment.* Build technical trust in cloud adoption and provide training and guidance to development and operations teams for seamless cloud utilization.We Want to Work With Someone Who* Is proficient in at least one programming language: Python, Golang, or C.* Understands REST APIs and database transactions.* Has knowledge and experience with OS, network, and storage technologies.* Is passionate about learning new technologies and actively applying them in operational environments.* Has a deep understanding of key OpenStack components such as Nova, Neutron, Cinder, Keystone, and experience in performance optimization.* Has experience in service operation and deployment using Kubernetes.A Note for Potential Colleagues"You will have the opportunity to experience cloud platform serving based on the latest trends of CI/CD and TDD."* Our team does not just 'write code.' We lead from problem recognition to infrastructure architecting, allowing you to experience the entire process of feature development, operation, and deployment automation. We constantly experiment with and apply new technologies, aiming for the highest level of operational automation and testing environments.* If you want to experience everything about cloud-native, discover a new career as an infrastructure developer, or are eager to learn more about infrastructure technology, we welcome you!

About Toss Insurance Toss Insurance was founded to reshape the insurance sector within the financial ecosystem. The team is building a platform that helps insurance consultants use their expertise and engage more deeply, so they can address customer needs more effectively. This work aims to transform how people experience insurance consultation, contracts, and management, changing the structure of the insurance business itself. Role Overview: Platform Product Owner Design and improve the core systems and platforms that support Toss Insurance’s services. Define and refine foundational tools used by insurance consultants and internal teams, covering consultation, contracts, customer data, and operations. Focus on building a strong platform foundation rather than individual features, supporting productivity and scalability across the organization. Work as a key member of the product team, shaping products that reflect the structure and flow of the insurance business. Main Responsibilities Platform Product Strategy Analyze the full process from consultation to contract maintenance, identifying platform challenges. Set platform roadmaps and priorities aligned with business goals. Balance immediate improvements with long-term strategy. Problem Definition and Structuring Use user experience data from consultants, operations, and customers to define issues. Break down complex workflows into actionable product tasks. Product Discovery and Delivery Lead the process from forming hypotheses through validation, launch, and ongoing improvement. Work closely with designers, front-end and back-end engineers, and infrastructure/security specialists. Oversee timelines and quality to ensure results are delivered. Platform Improvement and Adoption Continuously enhance shared systems to support daily operations. Promote adoption and drive gains in efficiency, productivity, and stability. Stability and Compliance Address privacy, security, and compliance needs through product solutions. Lead efforts to build stable, scalable system architecture. What We Look For Experience defining and leading problem-solving with both customer and internal perspectives. Ability to break down complex challenges using data and turn them into clear plans. History of collaborating with a range of stakeholders to complete projects. Experience setting priorities and managing resources across multiple projects. Interest in building structures that help products, teams, and businesses grow together. Preferred Qualifications Background in planning or operating platforms, back-office, or B2B systems. Familiarity with insurance, finance, or compliance topics. Understanding of technology-based systems, including infrastructure, data, and security. Experience improving products in organizations experiencing rapid growth. What to Expect Direct involvement in designing the core flow of the insurance business, building both domain knowledge and product expertise.

Join Our Team The Industrial Designer at Toss collaborates with external developers and the Device Team, forming a vital part of our Industrial Design team. Our Industrial Design team is dedicated to innovating products in the emerging offline payment industry. You will work closely with Product Designers, QC Managers, Operations Managers, and other colleagues to successfully launch top-tier payment devices. What You'll Be Doing Designing payment devices and various physical products for Toss Place. Establishing and enhancing a user-friendly and consistent product design identity. Conceptualizing suitable forms and usability for products, bringing them to life. Who We’re Looking For A comprehensive experience in product design through to mass production is essential. Understanding of manufacturing processes, including basic principles of mold design and mechanical engineering, is required. Proficiency in 3D tools and rendering software is a must. Experience with solid modeling software like NX, CATIA, or CREO is a plus. Ability to present logical reasoning behind design choices to persuade colleagues is essential. You should be proactive in setting goals and delivering results. Portfolio Submission Tips Please include a portfolio that effectively showcases your design solutions and considerations for manufacturability. Important Note We require a portfolio for the Industrial Designer position. Your Journey to Joining Toss Place Application Submission > Job Interview > Cultural Fit Interview > Reference Check > Compensation Discussion > Final Offer & Onboarding

Join Toss Payments as a Frontend Developer and be part of a dynamic team that builds user-friendly payment solutions. While we primarily seek candidates with over 4 years of experience, we also welcome passionate developers with at least 3 years of experience to apply for other positions listed in our job postings!About the Team:The Frontend Developer role at Toss functions within a matrix structure, collaborating closely with Product Owners, Designers, Server Developers, and Data Analysts to deliver innovative services and products.The Frontend Chapter operates as a cohesive team, sharing knowledge through regular 'Tech Talk' sessions and engaging in collaborative library development and code reviews.This year, our goal is to scale the Frontend Chapter to meet the growing demands of Toss's business, ensuring smooth operations across our platforms.Your Responsibilities:Develop safe and user-friendly payment interfaces.Create various B2B SaaS products to support merchant businesses.Enhance the frontend development environment with a focus on delivering exceptional user experiences and contribute to the creation of shared libraries like TDS.What We Are Looking For:Proficiency in SPA frameworks such as React, Vue, or Angular.Strong understanding of HTML, CSS, and JavaScript.A keen appreciation for UI/UX principles.Experience with distributed version control systems like Git.Please Highlight These Experiences on Your Resume:Experience with static type analysis in JavaScript using TypeScript or Flow.Familiarity with server-side rendering (SSR) and development of web apps within mobile applications.Experience in UI development considering responsive design, web accessibility, and web standards.Experience with testing and deployment automation.Proficiency in using module bundlers like Webpack.Technologies We Use:Core: React, TypeScript, Next.jsState Management: React-QueryStyling: EmotionPackage Manager: Yarn Berry