Full Stack Engineer

Design, implement, test, and operate backend Web APIs and large-scale data processing pipelines using Go, Python, and cloud services. Build and maintain web frontends with TypeScript, React, and Next.js, implement test automation and CI/CD, improve performance, refactor code, develop shared libraries and UI components, and respond to on-call incidents.

Responsibilities

• Develop and operate backend systems including Web APIs and data processing pipelines
• Design and implement frontend web applications with TypeScript, React, and Next.js
• Write and maintain automated tests and test code
• Improve performance and refactor legacy code to reduce technical debt
• Develop and maintain shared internal libraries and UI components
• Manage deployments and CI/CD pipelines
• Respond to on-call incidents and perform operational troubleshooting

Requirements

• 2+ years of backend development experience in Python or JavaScript
• 2+ years of frontend development experience with TypeScript, React, or Next.js
• Experience designing, developing, and operating Web APIs and data processing pipelines on cloud services
• Experience with database design, development, and operation using RDBMS, NoSQL, or NewSQL
• Experience using Git for version control
• Business-level Japanese proficiency equivalent to JLPT N1

Benefits

• Complete social insurance through the Kanto IT Software Health Insurance Association
• Commuting allowance
• Communication allowance
• On-call allowance
• Company-provided MacBook Pro or Windows PC
• Paid holidays and leave including weekends, national holidays, year-end and New Year holidays, annual paid leave, summer leave, sick leave, and bereavement leave