Senior Go Engineer, Full Stack

We are looking for a Senior Fullstack Engineer with deep expertise in Go to join a diverse, product-minded team that values collaboration, impact, and continuous learning. We're a distributed engineering team working across Europe (within +/- 1 hour of CET); topi is headquartered in Berlin. Engineers are expected to be comfortable navigating the entire stack (both Frontend and Backend).In this role, you will be architecting features from the database to the browser. Your center of gravity is the Go backend, APIs, data models, system design, but you'll move into the React/TypeScript frontend whenever the feature requires it. You'll join an experienced and supportive team where you'll have a significant voice in shaping both our technical direction and the product itself.     About YouThis is a role for an engineer who lives in the backend but enjoys reaching across the stack. You'll thrive here if you can:

• Own the Full Lifecycle: Build, scale, and maintain modern web applications where the heavy lifting sits in our Go backend, with the willingness to ship in React/TypeScript on the frontend whenever a feature calls for it.    
• Bridge the Gap: Design and implement clean APIs in Go while ensuring they are seamlessly integrated into a performant, accessible React frontend.
• Architect for Scale: Maintain high standards for code quality and performance across the entire stack, from backend microservices to frontend component libraries.
• Collaborate Broadly: Work closely with Product and Design to turn ambiguous requirements into polished features.
• Agentic Engineering Mindset: You treat AI coding agents (Claude Code, Codex, and the like) as real collaborators, not autocomplete. You own every line that ships under your name, whether you typed it or an agent did. You're motivated to deep-dive into agent workflows and bring the judgment that turns agent output into production-grade code.