Senior AI Enabled Product Engineer - Frontend Focus gesucht in Berlin

You will own the part of nebenan.de that neighbors actually see and touch. This is a frontend-focused role on a full-stack product team: your depth is in the browser and on mobile web, and you follow a feature all the way through the API and into production. You will work with React and TypeScript on the frontend. Ruby on Rails on the backend, PostgreSQL, and AWS., * Own a product area end to end. From prototype through production to iteration, mobile-first. You decide from usage data what to improve next and keep the area healthy on an ongoing basis.

• Run what you build. Set and meet performance and reliability targets for your area, instrument before shipping, and handle incidents in your own work.
• Challenge the plan. You work with a product lead who owns the outcome and a product analyst who designs and validates experiments. If a piece of work won’t move the metric it’s meant to move, say so early.

Build the interface

• Build React features are accessible, fast, and consistent with our design system.
• Own and extend the design system. Components, tokens, and patterns that other engineers reuse. You push generic work into shared components early.
• Work across the client-server boundary. Shape the APIs your screens depend on; make deliberate choices about data fetching, caching, loading, and error states; and understand what’s happening on the network.

Work with AI and evidence

• Direct AI and be accountable for what it writes. You set intent, review what comes back, and own everything that ships under your name.
• Replace manual QA with evidence. Automated tests, visual regression, and instrumentation ground your confidence in data.

What this role is not

• Not a ticket taker. You own working software in production, not merged pull requests.
• Not pixel-pushing behind a designer. Design and validation of the experience sit with product and design; building it into production software and pushing back on it are yours.
• Not frontend-only in practice. Depth in the frontend, contribution across the stack., * A meaningful job - we’re creating a great product with real added value for the community
• Work in a cheerful and experienced team that exchanges ideas and learns from each other
• Insights into the entire work process of our social startup and the nebenan.de foundation
• Responsibility and great opportunities to actively contribute
• Your nebenan.de SpenditCard - you’ll receive an additional income of 35 Euros per month, which you can use for things of your choice
• 30 days of vacation per year - we also offer the possibility of workation models and a sabbatical
• A workplace in Berlin-Kreuzberg and regular events like yoga or Lunch & Learn sessions.

• Strong React in production: component design, state management, rendering behaviour
• A real grasp of client-server architecture: how the browser and the backend actually talk, what that costs, and how it fails
• Craft in the fundamentals: modern CSS and layout, semantic HTML, accessibility, web performance, responsive and mobile-first work
• Solid command of TypeScript
• Experience building or maintaining a design system, or at least a clear opinion about what makes one work
• Comfortable owning outcomes, working day to day with non-engineers
• Uses AI deliberately as leverage: directs and reviews generated code to production quality
• A maker: ships, validates, then refines on what the evidence shows
• Cares that the thing works for the person using it, on their phone, on their network
• A plus: enough backend familiarity (Ruby, or any server-side language) to change an endpoint yourself
• A plus: data-informed product work, with decisions grounded in data
• English skills for working in our international team; German is a plus