English summary for screening — check the original posting before applying.
Join a new venture within UPSIDER to build a global financial platform supporting innovators. This role involves developing and launching a new financial service from the ground up, contributing to its growth and evolution.
Must-haves
- 3+ years of professional experience in web application development
- Backend development experience with a statically-typed language
- Frontend development experience with React or Next.js
- Ability to translate requirements into features and designs in collaboration with Product Managers and business stakeholders
- Practical experience with Agentic Coding using tools like Claude Code, Codex, or Devin
Nice-to-haves
- Design and implementation skills considering extensibility, robustness, scalability, and testability
- Experience operating web services or applications
- Experience leading or managing teams, projects, or technical decisions
- Development experience in financial or accounting systems
- Experience with complex and challenging system requirements such as payments
Tech stack
TypeScriptReactHonoPrismaGoogle CloudGithub ActionPostgreSQL
Work style
Full remote, full flex, with a Tokyo office location.