Senior Full Stack Engineer (Java, Reactjs)

OverviewBerlin-based software company building a Vietnam engineering team. We hire people who already ship with Claude Code not people who treat AI as a side tool.Core work is Spring Boot + React. You will also own a live Grails app for a few months. Grails is JVM; strong Java is enough to stabilize it and hand it off. You own outcomes. You do not hide behind the model.DescriptionShip production features end-to-end: APIs, data, integrations, React UI.Use Claude Code daily to write, refactor, test, and debug. Prompt with constraints and verification loops, not one-shots.Review, harden, or reject AI output. You are accountable for what ships.Take over the Grails app for a defined transition while the stack moves to Spring Boot + React.Hold the bar on architecture and maintainability. Work directly with Vietnam and Berlin.Job Requirements5+ years shipping production software.Daily Claude Code use on real product work not demos.Strong Java. Spring Boot in production preferred; Grails or another JVM web stack is acceptable if you can get productive fast.Production React.Judgment to rewrite or reject AI-generated code. You finish things.Fluent English **Stack: Java / Spring Boot · React · REST · Grails for a few months · Claude Code · Git · CI/CD. Backend and frontend in the same week.**High pace. Small team. Measured on what reaches production, not tokens burned. If you need a perfect spec or permission to use AI, skip this role.** Offer:early seat in the Vietnam entityline to Berlin leadership13th-month salarypremium private health insurance12 days leave + flexible Friday WFH