Backend Engineer, Lead Member (Core Systems)

WealthNavi

Backend

Java

Spring

About this role

This backend lead extends the live core system of an automated investment service, turning requirements from securities specialists into maintainable software built for higher transaction and data volumes. Hands-on work centers on Java/Spring Boot backend design and development, with TypeScript/Next.js frontend tasks as needed. It includes production-data performance tuning, refactoring, monitoring, incident response, operational automation, and technical decisions and design/code reviews. The stack includes PostgreSQL on Amazon Aurora and GitHub Actions. Not all listed criteria must be met; roughly ten years of Java experience is a guideline, and design judgment matters more. Relevant background includes managed cloud services, maintainable tests, live-system improvements, production issue diagnosis, and end-to-end design and operations. The role also calls for leading a five-plus-person development project and proactively coordinating with business teams. Frontend experience and securities knowledge are not prerequisites.

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