Senior Frontend Engineer

About PayPay Card PayPay Card Corporation was established in 2021 to provide users a FinTech service that is more accessible and convenient compared to previous credit cards and credit services, by integrating with the PayPay payment platform, which has surpassed 70 million users since its launch (as of July 2025). We are looking for people who are passionate about refining our products at an overwhelming speed that other companies cannot match, as well as professionals who are interested in promoting the spread of cashless payments in Japan and the use of these payments as a financial life platform. Let us work together to create new value for users.

※ Please note that you cannot apply or be selected in parallel with PayPay Corporation, PayPay Card Corporation and PayPay Securities Corporation. Job Description We are looking for web frontend engineers to work on the PayPay Card mini-application, and other web frontend, with a laser focus on scalability and maintainability. PayPay Card aims at revolutionizing the credit card industry, making payment easier than ever, from two different angles: Bring the credit card experience to the next level: we have many functionalities in the pipe to improve our product, not to mention the integration into the PayPay ecosystem as PayPay Card is part of the PayPay Group.

(Re-)architect our systems landscape: we want to reassess our frontend systems relevancy and update the architecture according to our product technical roadmap. It is bundled with difficult design challenges to solve: we simply want to get it right. As a fast-paced company leading the payments industry, we need our engineers to be versatile and enthusiastic to take on new challenges in order to stay at the forefront.

Indeed, we strive for continuous improvement within our systems as well as outside our systems. Additionally, we value communication, to smoothly cooperate with other teams, and inclusivity, to efficiently navigate in a multicultural environment.

Responsibilities

Work with Product Managers, Designers, and various tech teams to implement features. Improve the frontend architecture based on product and technical roadmap. Work to bring product and organization vision to life.

Contribute to the team by sharing knowledge, participating in code reviews, and providing feedback to uphold and ensure best practices. Improve the product’s long term technical quality. Triage, debug, and resolve product issues.

js 3, TypeScript) REST API with OpenAPI codegen TanStack Query and Zod are used for API handling and data validation Storybook is used for component visualization and UI testing Sentry and Google Analytics are used for error and product reporting CI/CD pipeline, including testing and deployment tasks, relies on GitHub Actions Deployment is static (AWS S3, CloudFront and Route53) Coding environment: GitHub, GitHub Copilot, Visual Studio Code Documentation Project management: Confluence, Miro, JIRA Communication: Slack, Zoom, Office 365 Please note that PayPay Card is challenging its current architecture, potentially introducing new technologies and/or deprecating existing ones.

Required Qualifications

At least 7 years of industry experience developing secure web frontend applications in JavaScript and/or TypeScript. At least 2 years of industry experience with VueJS (preferred) or React. Experience with designing frontend architecture.

Experience with leading frontend project development. Software engineering best practices and computer science knowledge. Experience with building frontend hosting infrastructure and deployment pipelines.

Preferred Qualifications

Experience with launching a frontend product. Experience with frontend performance monitoring and optimization. Experience with designing and implementing server side RESTful APIs.