Android Developer at Tossbank | Seoul

Join Our Dynamic Team!As an Android Developer at Tossbank, you will be an integral part of both a squad/team and the Android chapter.We operate in squad-based units, where diverse professionals collaborate in a small startup-like environment, fostering autonomy and innovation.Every Thursday, we break out of our silos to engage in Engineering Day, where chapter members share knowledge, discuss technology, and conduct code reviews together.Your ResponsibilitiesCollaborate with Product Owners, Product Designers, Server Developers, and other roles to create and enhance the Tossbank Android app service.Tackle technical challenges related to web-app communication to ensure seamless service delivery.Utilize our unique Toss Design System (TDS) to swiftly complete UI designs, allowing you to focus on core logic.Take ownership of all Android development decisions and prioritize tasks effectively.Experience rapid iterations by releasing new features to over ten million users weekly.Who We're Looking ForA proactive individual with a strong sense of responsibility for product quality and stability, who has successfully led continuous improvements.A candidate who has immersed themselves in technology and domain knowledge to add value to customers' lives.An individual who aspires to design optimized interfaces based on a comprehensive understanding of Android and mobile platforms.Technologies We UseKotlinKotlin Coroutines, RxJavaView System, Jetpack ComposeTDS (Toss Design System)Model-View-WhateverApplication ProcessApplication Submission > Pre-assignment Test > Cultural Fit Interview > Reference Check > Final Acceptance

About the Team The Data Engineer (CPC) position will be part of the CPC Platform team within the Data Division of Tossbank. The CPC Platform team is dedicated to building a reliable data framework to meet various regulatory requirements (CPC, disclosures, regular reports, etc.) from financial authorities, enhancing both Tossbank's external credibility and internal operational efficiency through automation and advancement. This team thrives in an environment that demands frequent and complex queries, high standards of data integrity, and reproducible data management, allowing members to solve diverse problems while deepening their understanding of the banking domain and data engineering skills. Key Responsibilities Implement and respond to external data requests from financial authorities (CPC, disclosures, periodic reports) through system integration. Design, develop, and operate necessary data marts and dashboards for the required data. Ensure the reliability of reporting systems through data quality management (DQ). Collaborate with various departments such as lending, deposits, cards, and delinquency to provide data support for data-driven decision-making. Systematically manage reporting tasks based on banking laws and regulations. Ideal Candidate Profile Proficient in SQL, capable of extracting necessary data accurately and efficiently. Interested in exploratory data analysis and deriving meaningful insights. Enthusiastic about building and managing information systems or data warehouses and dashboards. Possess a strong sense of responsibility for data quality, capable of leading smooth collaboration with related departments. Curious about technologies and tools for automation and system optimization beyond simple data tasks. Understanding or interest in open-source and Hadoop-based data environments is a plus. Welcomes junior candidates with a willingness to learn and adaptability to new technologies over financial domain expertise. Resume Submission Tips Detail impactful projects you've worked on, highlighting your proactive roles and the outcomes of your contributions. If applicable, describe your experiences responding to requests from financial authorities or external agencies, including your analysis of requirements and resolution strategies. Share experiences where you deeply engaged with your work, demonstrating your analysis of root causes and structural improvements. Discuss any instances where you proposed or considered improvements beyond existing practices, focusing on the process and results. Application Journey at Tossbank Application Submission > Job Interview > Cultural Fit Interview > Reference Check > Salary Negotiation > Final Acceptance and Onboarding Important Notes Any discrepancies in submitted resumes or disciplinary actions during employment history may lead to cancellation of the hiring process. Candidates who meet disqualification criteria as per Article 8 of Tossbank's employment regulations may have their applications canceled. Individuals with disabilities or veterans will receive preferential treatment as per relevant laws during the application process. A Word for Future Colleagues "You can grow your career in various paths such as Data or Finance sectors at Tossbank."

# Join Our Team- As a Product Manager (LLM) at Tossbank, you will lead the rapid experimentation of AI/ML-based features and products, connecting them to real user experiences to drive product success.- After joining, you will be part of the ML Service Team, responsible for discovering, planning, implementing, and operating AI-driven products.# Your Responsibilities- Conceptualize and lead end-to-end improvement cycles for AI and ML-based products.- Define and execute how various AI and ML technologies should function in Tossbank's customer-facing or internal products.- Collaborate closely with Data Scientists and ML Engineers to bridge technology and product.- Understand complex technical, business, and regulatory requirements, working with developers to strategically solve problems.- Define business impact, design metrics, and enhance products through A/B testing and iterative experimentation.- Design AI-driven user experiences and business structures with a long-term perspective.# Ideal Candidate- We are looking for someone with experience or a strong interest in services utilizing AI Agents, LLM, and ML.- You should have a track record of leading challenging projects with high technical complexity or uncertainty.- If you want to engage not just in simple project management, but also in influencing company-wide development processes and culture while building a stronger team with various stakeholders (planning/design/development/operations/partners), you will be a great fit.- You must possess the ability to create incremental results by considering both business impact and technical feasibility.- We seek someone who thinks comprehensively, redefines problems when necessary, and guides towards better solutions rather than merely executing given tasks.- Practical experience in designing and operating machine learning-based products or systems is a plus.# Resume Tips- Please detail your direct contributions to products/services/projects.- Clearly outline the flow from problem definition to solution development to collaboration with stakeholders to final results for each product, service, or project.- Instead of merely listing duties, include achievements and insights gained during the process.- Share any experiences where you directly contributed to measurable outcomes or improved business metrics.- If you have experience collaborating with multiple developers to solve complex technical issues, please share.# Joining the Tossbank Journey- Application submission > Job interview > Cultural fit interview > Reference check > Compensation negotiation > Final acceptance and onboarding.# Important Notes- If any false information is found in your resume or disciplinary issues are identified during your employment history, recruitment may be canceled.- Candidates who fall under disqualifications as per Tossbank’s employment regulations may also have their recruitment canceled.- We prioritize applicants with disabilities and those eligible for national veteran benefits in accordance with relevant laws.# A Word from a Colleague“It’s not enough for technology to be impressive; it gains meaning only when it connects to customer experiences.” At Tossbank, AI PMs don't just engage in experiments and ideas. They take full responsibility for understanding how technology solves problems and what experiences it delivers to users.- You will work closely with Data Scientists and ML Engineers, using real user feedback, not just numbers, to guide your decisions. If technology doesn’t function well or doesn’t fit the context, shifting directions and redefining the problem is also part of the PM's role.- This is a team where such considerations are natural and where quick experimentation is encouraged!

Join our innovative UX Research Team at Tossbank, where collaboration and shared insights drive our research initiatives.About the TeamOur UX Research Team thrives on exchanging diverse research perspectives and insights, fostering a collaborative environment.The UX Researcher collaborates with all teams requiring user feedback, primarily working closely with the product team. We don't just respond to research requests; we proactively suggest improvements when we identify issues in the service.Your RoleAs a UX Researcher at Tossbank, you will investigate various financial product experiences that change throughout a customer's lifecycle and explore the interconnections between these products.You will provide insights that enable effective customer communication from a holistic banking perspective rather than focusing solely on specific financial products or services handled by individual product teams.Based on identified pain points and needs experienced by users of traditional banks, you will uncover edge points that can deliver new value.Your work will fundamentally involve proposing direction for how products should evolve based on customer feedback and identifying areas for improvement.You will utilize appropriate research methodologies such as Usability Testing (UT), In-depth Interviews, Focus Group Interviews (FGI), and Online Surveys to examine user experiences.Close collaboration with the product and strategy teams is essential; your role will involve discovering product issues and collaboratively leading strategic propositions rather than simply executing requests for research.

Join Our Team! As a Machine Learning Engineer specializing in LLM, you will be a vital part of the TossBank ML Platform Team. Our ML Platform Team is dedicated to developing and operating the machine learning platform for TossBank. Your Responsibilities: Utilize LLM serving frameworks to directly operate and optimize models in a GPU environment. Build and manage the LLMOps platform, including LLM gateway servers, workflows, and vector databases. Develop LLM applications using various LLM technologies. Who We Are Looking For: Experience in serving models using frameworks like vLLM, SGLang, and TensorRT LLM in high-traffic environments is a plus. Previous experience in building and managing LLMOps platforms is preferred. Hands-on experience in developing LLM applications using LLM technologies is desirable. Familiarity with LLM fine-tuning and optimization is advantageous. A passion for the latest LLM technologies and a willingness to embrace new challenges are essential. Resume Tips: Detail impactful projects from your past experiences. Expand on your experience with LLMOps platform construction and troubleshooting. If you've implemented improvements in real services, share quantifiable results (omit sensitive information as necessary). Path to Joining TossBank: Application submission > Live coding test > Job interview > Cultural fit interview > Reference check > Compensation negotiation > Final acceptance and onboarding. Important Notes: Any false information in resumes or disciplinary records from previous employment may result in cancellation of recruitment. Applicants who fall under disqualifying criteria as per TossBank's hiring regulations may also face cancellation of recruitment. Priority is given to applicants with disabilities and those eligible for national veterans' benefits in accordance with applicable laws. A Word from a Colleague: "This company is the best for ML Engineers who seek explosive growth." It provides a fantastic environment to work freely and immerse in tasks. It's a great choice for those looking to grow alongside exceptional colleagues.

About the Team You'll JoinThe Machine Learning Engineer (Product) is an integral part of the team responsible for AI services at Tossbank, collaborating with a diverse group of professionals including ML Engineers, Data Scientists, Server Developers, and Product Owners to oversee AI product development from inception to deployment.You will collaborate with various squads utilizing AI services to create innovative products and solutions.Your primary objective will be to automate and enhance processes such as identity verification, document processing (OCR), and customer service automation using cutting-edge AI technology.Your ResponsibilitiesDesign and develop serving systems to ensure the stability and scalability of various machine learning models, including advanced AI technologies like Vision and LLM.Architect optimal serving structures tailored to specific ML model needs, implementing rapid and efficient solutions using specialized tech stacks.Create individual services capable of handling high traffic volumes based on a robust server architecture.Design serving pipelines for both batch and real-time ML processes, ensuring reliable operations with large datasets.Develop servers that can reliably serve heavy computation AI models while maintaining optimal response times and throughput.Preferred QualificationsProven experience in deploying ML models in real-world environments, focusing on performance tuning and optimization.Experience in developing and operating large-scale ML services that meet high SLA requirements within production settings.Familiarity with model compilation and optimization tools like TensorRT and ONNX Runtime to maximize inference performance on GPU environments.In-depth understanding and experience with ML serving and server development technologies, including Triton Inference Server, Kubernetes, and FastAPI.Strong knowledge of large-scale distributed systems and data pipeline technologies such as Airflow, Hadoop, Kafka, Spark, and Flink.Ability to design service architectures that balance stability and scalability while producing maintainable, high-quality code.Experience in leveraging AI technologies to solve complex problems through innovative products or services that drive business impact.Resume RecommendationsHighlight practical development experience with specific, case-driven examples.Include technical insights into problem-solving processes along with actual implementations.Discuss experiences prioritizing cost-effectiveness among trade-offs related to architectural complexity and development resources.

Join a pioneering team at Tossplace, the only division within Toss dedicated to creating offline services, where we are shaping the future of the offline payment industry centered around physical devices.The Android Developer at Tossplace operates within a matrix structure, being part of both silo teams and the Android chapter.As a compact and agile organization, you will experience hands-on collaboration to influence technology direction and witness the real-world impact of our products.Our automated deployment process enables us to release updates weekly, allowing teams to focus on developing desired functionalities.Every Thursday, the Android chapter meets outside of their silos for Engineering Day, fostering active communication, sharing technical insights, and conducting code reviews.As an Android Developer, you will have a direct impact on services functioning across various device environments.In this role, you will:Develop and operate the entire offline payment process, from card reading to VAN approval, across silo teams.Create various Android products, including apps for payment terminals and business owner applications distributed via the Play Store.Implement Android features considering the unique characteristics of different devices, gaining experience in real-world development.Review PRs from team members to elevate code quality and share insights.Quickly assemble UI with Toss Design System (TDS) to easily implement great interactions, allowing you to focus on core logic.We are looking for candidates who:Have experience designing complex structures for Android commercial services, with a focus on scalability and maintainability.Possess experience improving code quality and productivity within a Kotlin-based Android codebase.Have designed UI structures and interactions to provide a consistent user experience across various device environments.Have a strong understanding of Android UI/UX guidelines.When applying, please highlight your experiences that demonstrate:A strong sense of responsibility for product quality and stability, along with a proactive approach to continuous improvement.Your deep engagement in enhancing customer value through a strong grasp of technology and domain knowledge.Your rich understanding of Android and mobile environments, focusing on optimized interface design.Technologies we use include Kotlin, Kotlin Coroutines, Jetpack Compose, and TDS.

#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

Join our dynamic team at Tosscareers as a Node.js Developer! We are looking for innovative and passionate developers who thrive in a fast-paced environment and are eager to contribute to exciting projects. As a Node.js Developer, you will work with cutting-edge technologies and collaborate with cross-functional teams to deliver high-quality solutions.

About the Team You Will Join The iOS Developers at Toss operate within a matrix structure that encompasses various silos, teams, and the iOS chapter. At Toss, services and products are developed within siloed teams of 6-8 diverse professionals, fostering an environment of autonomy akin to that of a small startup. Apart from the silos, there is a dedicated team focused on creating shared modules within the iOS code, emphasizing deep technical considerations, accessibility for individuals with disabilities, and security aspects, ensuring the creation of services truly for the customer. The iOS chapter hosts an Engineering Day every Thursday, allowing members to step outside their silos to engage in active discussions about technology, share development expertise, and conduct code reviews together. Your Responsibilities Upon Joining Contribute to the development of Toss’s super app, which offers hundreds of services including money transfers, asset management, credit management, loans, insurance, authentication, and payments. Work on innovative financial services being developed by Toss, such as Toss Bank and Toss Securities. Continuously challenge yourself and conduct various experiments to develop a safe and fast iOS application to enhance user financial experiences. Utilize a design and automation system that generates screens from defined models and a fully Swift project split into over 150 modules, allowing you to concentrate on core logic during development. Who We Want to Work With Ideal candidates will have over 3 years of experience in iOS development or possess equivalent skills. Proficiency in Swift development and experience with RxSwift are highly desirable. An understanding of iOS and Apple's design philosophy (HIG) is preferred. Strong comprehension of network and encryption algorithms is required. Familiarity with performance and stability improvement tools such as Instruments is advantageous. Resume Tips Please share any experiences where you demonstrated ownership and led your own projects or overcame challenging technical problems. We appreciate familiarity with testable code practices and experience in automation for testing and deployment. Let us know if you have experience in developing large-scale services. It's worth noting that some of our team members began their journey with RxSwift at Toss; we value solid fundamentals, logical thinking, and the ability to implement code more than specific technical stacks or frameworks. Technologies Used at Toss Multi-module App, Micro Feature Architecture, Example (Micro) App Swift Concurrency, RxSwift, Combine AutoLayout, FlexLayout, and more.

Coupang exists to deliver exceptional experiences to our customers. When customers say, "How did I live without Coupang?" we know we have fulfilled our mission. With a singular dedication to making shopping, dining, and everyday life easier for our customers, Coupang is leading innovation across the multi-billion dollar e-commerce sector. 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 take pride in being a globally listed company rooted in startup culture. This agility from our inception drives our continuous release of new services and expansion of our business. Each Coupang employee is given the opportunity to embody an entrepreneurial spirit and drive innovation and initiatives. The essence of working at Coupang is the courage to dive into work and achieve results. Here, you will witness growth for yourself, your colleagues, your team, and the entire company every day. All Coupang employees are genuinely committed to our mission of shaping the future of commerce. We tackle customer problems, challenge traditional notions, and push the limits of what is possible. If you seek an amazing work experience in a hyper-connected world, with cutting-edge technology and always-on availability, join Coupang today. Job OverviewCoupang Pay, a subsidiary of Coupang, provides a tailored electronic payment service (PG) to meet the growing needs of Coupang customers. We focus on delivering innovative payment and financial service solutions to everyone using Coupang's platform, from customers purchasing goods on Coupang and Coupang Eats to sellers utilizing Coupang's open market and affiliated merchants. With a wealth of experience in fintech and a deep understanding of Coupang’s business, our team is dedicated to revolutionizing all payment-related customer experiences. Curious about Coupang Pay? Come join our journey! Based in Seoul, the Coupang Pay product engineering team develops, launches, and manages products that excite customers daily. We are looking for skilled software designers with extensive experience in creating and scaling innovative customer experience software.

Join Our Dynamic TeamAs a Node.js Developer at Tossplace, you will be part of the SDK Platform team.The SDK Platform team is dedicated to developing and enhancing a plugin SDK that integrates the Tossplace service with various franchises in a flexible and scalable manner.Your role will involve creating essential work platforms that empower Tossplace team members, providing positive impacts and insights for everyone.We leverage the latest technology stack to build fast and scalable products, playing a vital role in our growing service.Your ResponsibilitiesDesign and develop an extension platform (plugin SDK) that runs on Toss POS to innovate offline payment and store experiences.Enhance operational efficiency for store owners by developing delivery integration features in Toss POS, enabling comprehensive store management.Build an automation platform to improve productivity across the Tossplace team.Who We Are Looking ForIndividuals who have experience simplifying mobile user interactions.Applicants with a background in data collection and monitoring to ensure uninterrupted service during external disruptions.Developers who can write flexible, readable, and maintainable code.Candidates with experience in transforming repetitive processes into innovative methods.Passionate about improving developer experience.Resume RecommendationsDetail your contributions to projects, including your role, technologies used, and improvements made.Share your experience managing web/app services with technologies like Node.js, ELK, ORM, etc.Include any experiences you have in automating inconvenient interfaces.Application Process at TossplaceApplication submission > Preliminary task > Job interview > Cultural fit interview > Reference check > Compensation discussion > Final acceptance and onboarding.Depending on the job interview results, a deep-dive interview may be requested.During the interview process, we may propose suitable subsidiaries based on the applicant's strengths and job fit.

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 innovative team at tosscareers as a Server Developer (Foundation). In this role, you will be instrumental in building robust server-side applications that drive our technology platform. You will collaborate with cross-functional teams to develop scalable solutions that enhance user experience.

Join Our Team! As a Frontend Developer at Tossplace, you'll be an initial member, gaining diverse experiences. We're shaping the future of the offline payment industry, planning exciting changes in the payment ecosystem. You'll collaborate with Product Owners, Designers, and Hardware Engineers to successfully launch top-notch payment devices. Our frontend chapter collaborates closely like a single team, sharing new tech topics and development expertise during weekly 'Tech Talks' and conducting code reviews. This year, our goal is to scale our frontend chapter to meet the increasing resource demands of Toss's business. Explore Everything About Toss Frontend Chapter Your Responsibilities At Tossplace, we solve various challenges to drive digital innovation in the offline payment market. As one of the initial members, you will develop solutions to challenging problems encountered in the B2B offline payment market from the ground up. You will create the essential POS (Point Of Sales) systems that support all platforms via a single source code using web technologies. In addition to POS, you'll develop web views for kiosks and payment devices used by customers in stores. Moreover, you will work on desktop webpages such as owner dashboards and mobile webpages for table orders and pickups. You’ll encounter unique and challenging frontend development experiences as you adapt to various offline store environments. Who We're Looking For Proficiency with SPA frameworks like React is highly desirable. Experience with Electron and web apps within mobile apps is a plus. Familiarity with static type analysis in JavaScript using TypeScript or Flow is preferred. We need someone who can proactively identify problems and analyze solutions rather than just implementing given tasks. Services You'll Handle POS: This system manages orders and payments, acting as a control tower for various products within Tossplace. It helps manage customer reservations in service sectors, providing CRM functionalities like points, stamps, and coupons. It also ensures seamless communication with payment terminals and receipt printers for smooth store operations. Kiosk: You'll also work on kiosks that improve customer interactions in F&B settings.

Join our innovative team as a Frontend Developer where you will play a crucial role in developing and enhancing our platform. You will work closely with designers and backend developers to create seamless user experiences. Your expertise in frontend technologies will help us deliver high-quality software solutions that meet our users' needs.

Join an industry leader in language services and technology! Are you passionate about enabling global brands to communicate seamlessly and effectively? Do you thrive in a dynamic, integrity-driven, and fast-paced environment? If so, we want to connect with you!TransPerfect, established to assist businesses in navigating the global marketplace, has grown into a premier provider of comprehensive language and business support services. Our offerings include translation, dubbing, subtitling, multicultural marketing, website globalization, legal support, and innovative technology solutions.We are seeking dedicated individuals who are ready to take initiative and contribute to our mission. We provide a robust platform for career growth and personal development, complete with thorough training in our services, technology solutions, and workflows. Ideal candidates will possess strong communication skills, an ability to build lasting relationships, and a focus on client success.In this role, the Director of Business Development will spearhead our MediaNEXT engagement model, specializing in video localization, including subtitling, voiceover, and graphic work, along with our proprietary technology tools.Key Responsibilities:Identify and secure new clients through referrals, cold calling, networking, and participation in industry events.Develop and manage a robust sales pipeline, overseeing all stages of the sales process.Build and maintain long-term client relationships through exceptional service and industry expertise.Create and execute sales plans aligned with company goals.

Coupang Pay builds electronic payment services tailored for Coupang’s diverse user base, including shoppers, Coupang Eats customers, sellers, and merchants. As a spin-off from Coupang, the team focuses on improving every payment experience across the platform through specialized fintech solutions. Role overview The product engineering team in Seoul develops and manages products that impact millions of users. This Staff Android Engineer role centers on designing and scaling Android applications for new fintech products, aiming to set a high bar for customer experience. What you will do Design, develop, and maintain Android apps for Coupang Pay’s new fintech offerings Work closely with engineers, product managers, and designers to deliver seamless payment features Support all stages of the product lifecycle, from initial concept through launch and ongoing improvement Follow software engineering best practices to achieve quality, scalability, and reliability Internal transfer application Current Coupang employees interested in this position should complete and submit the Internal Transfer Request Form using their Coupang email account.

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