Senior React Engineer, Full Stack

Senior Fullstack Engineer

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 React/TypeScript 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 won't just be "flipping a switch" on the frontend; you will be architecting features from the browser to the API. Your center of gravity is the React/TypeScript frontend, UI architecture, state, performance, polish, but you'll move into the Go backend whenever the feature requires it. This is not a frontend-only role: there will be regular backend work, and a clear interest in growing into our Go stack is essential. 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 frontend 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 React/TypeScript frontend, with the willingness to ship in Go on the backend whenever a feature calls for it,
• Bridge the Gap: Design and implement frontend architectures that integrate seamlessly with clean Go APIs, and contribute to those APIs when the feature requires it.
• Architect for Scale: Maintain high standards for code quality and performance across the entire stack, from frontend component libraries to backend microservices.
• 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 Frontend: Deep fluency in React/TypeScript. You move comfortably through modern tooling (e.g., Redux Toolkit, Styled Components, Storybook) and you care deeply about quality, ensuring your features are backed by solid testing frameworks (Jest, Cypress, or Playwright).
• The Backend: Solid backend fundamentals from production work, you've built and maintained server-side systems, ideally including web APIs. You don't need prior Go experience on day one, as long as you have rock-solid backend fundamentals and are motivated to master Go.
• 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.