English summary for screening — check the original posting before applying.
Seeking a Senior Frontend Software Engineer to join a new development base in Sapporo, opening in Summer 2026. You will be responsible for frontend development and technical problem-solving for key systems like Baitoル and Hatarako.net, contributing to a modern tech stack renewal with TypeScript and React.
Must-haves
- 5+ years of experience with TypeScript or JavaScript (including 2+ years of TypeScript)
- 3+ years of experience in the last 5 years developing and operating web applications with React
- Ability to design and implement efficient UI/UX
- Strong interest in technology and design, with a proactive approach to learning
Nice-to-haves
- Experience in agile development projects using Scrum
- Experience building and operating web applications using AWS or Google Cloud
- Knowledge of security, infrastructure, middleware, communication, browsers for Web API development
- DevOps knowledge and experience
- Knowledge and experience in communication control, load balancing for large-scale traffic
Tech stack
TypeScriptReactNext.jsReact RouterCSS ModulesTailwind CSSVitestStorybookOxlintOxfmtOrvalNxFigmaGitHubNew RelicClaude CodeCursorCodexKiroJiraSlackGoogle Meet
Work style
Hybrid (approx. 2 days per week telework), Onsite in Sapporo (Nihon Seimei Sapporo Building 17F). Flextime system available (core hours: 11:00 AM - 3:00 PM).
Other notes
Monthly salary: ¥367,854 - ¥662,137. Annual salary: ¥5,000,000 - ¥9,000,000. Average overtime: approx. 20 hours/month. Final interview is in-person at the Yotsuya Office.