Senior Go Engineer, Full Stack in Berlin

Your mission

We're 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.

Your profile

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 You
This 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.

To Be Successful in This Role, You'll Need:

• Experience: at least 6+ years of professional software engineering experience in a production environment.
• The Backend: Proven experience architecting and maintaining high-scale web APIs. You've shipped Go in production for 2+ years and are comfortable owning backend system design end-to-end.
• The Frontend: Motivated and willing to work in our React/TypeScript frontend, with enough baseline ability to ship features there when a story calls for it. Prior hands-on React/TypeScript experience is a plus, not a must.
• System Ownership: A "DevOps" mindset, comfortable with CI/CD, automated testing, and version control.
• Communication: Fluent English and the ability to explain complex technical trade-offs to non-technical stakeholders.

What we care about

• Teamwork: collaborating and supporting each other within engineering and across functions
• Inclusion: creating an environment where everybody can bring their whole self and do their best work
• Ownership: empowering you to do the work that is most impactful
• Sustainability: balancing work with family and personal hobbies so we can be at our best
• Growth: supporting each other's learning and development

Why topi?

• Impact from Day One - Your ideas are valued, and you actively shape our direction. No long feedback loops or complex hierarchies - you'll have a direct impact on what you do.
• Trust - We believe in our mission and in our team, offering trust-based working hours, permanent contracts, flexibility for home-country working.
• Flexibility - We offer flexible working hour arrangements to ensure a healthy work-life balance.
• Team Spirit - Shared rituals connect us, whether online or offline. We have regular formats like all-hands
• meetings, demo sessions, quizzes, and offsites - perfect opportunities to spend time as a team.
• Personal Growth - Learn from experienced colleagues and leverage the latest technologies and methodologies to succeed in your role.