Senior React Engineer, Full Stack

topi

5d•Hybrid

About The Position

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. 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.

Requirements

At least 6+ years of professional software engineering experience in a production environment.
Deep fluency in React/TypeScript.
Comfortable with modern tooling (e.g., Redux Toolkit, Styled Components, Storybook).
Solid testing frameworks (Jest, Cypress, or Playwright).
Solid backend fundamentals from production work; have built and maintained server-side systems, ideally including web APIs.
Motivated to master Go (prior Go experience not required on day one).
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.

Responsibilities

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.
Design and implement frontend architectures that integrate seamlessly with clean Go APIs, and contribute to those APIs when the feature requires it.
Maintain high standards for code quality and performance across the entire stack, from frontend component libraries to backend microservices.
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.
Deep-dive into agent workflows and bring the judgment that turns agent output into production-grade code.