About The Position

We are looking for product-minded engineers to join our diverse and driven team. We really value collaboration, making an impact, and continuous learning. Our product development team is based in Berlin, but we have folks working all over Europe, and you'll work closely with an experienced and supportive team. 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.

Requirements

  • At least 6+ years of professional software engineering experience in a production environment.
  • Proven experience architecting and maintaining high-scale web APIs.
  • Shipped Go in production for 2+ years and are comfortable owning backend system design end-to-end.
  • Motivated and willing to work in our React/TypeScript frontend, with enough baseline ability to ship features there when a story calls for it.
  • A "DevOps" mindset, comfortable with CI/CD, automated testing, and version control.
  • Fluent English and the ability to explain complex technical trade-offs to non-technical stakeholders.

Nice To Haves

  • Prior hands-on React/TypeScript experience is a plus, not a must.

Responsibilities

  • 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.
  • Design and implement clean APIs in Go while ensuring they are seamlessly integrated into a performant, accessible React frontend.
  • Maintain high standards for code quality and performance across the entire stack, from backend microservices to frontend component libraries.
  • Work closely with Product and Design to turn ambiguous requirements into polished features.
  • Treat AI coding agents (Claude Code, Codex, and the like) as real collaborators, not autocomplete. Own every line that ships under your name, whether you typed it or an agent did. Be motivated to deep-dive into agent workflows and bring the judgment that turns agent output into production-grade code.

Benefits

  • Trust-based working hours
  • Permanent contracts
  • Flexibility for home-country working
  • Flexible working hour arrangements
  • Shared rituals connect us, whether online or offline. We have regular formats like all-hands meetings, demo sessions, quizzes, and offsites
  • Learn from experienced colleagues and leverage the latest technologies and methodologies to succeed in your role.
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