Senior Fullstack Engineer (Frontend focus) (f/m/d)

The energy transition will not be won by using less energy alone, but by using energy exactly when it is available and sustainable. At encentive, we bring AI to the machine and change how industrial companies drive efficiency, sustainability and growth. Backed by General Catalyst (GC), we work with leading industrial companies across Europe and are now scaling to the next level. That's why we are looking for you.

As a Senior Fullstack Engineer (Frontend focus) (f/m/d), you join our Frontend/Backend team and work on data-intensive B2B applications for energy management and optimisation. You work on the layer between backend and UI and make sure time series, KPIs and asset data reach the frontend fast, correct and traceable.

• You work on the data flow between backend and UI: API contracts, backend-for-frontend, server state, caching and invalidation
• Together with the backend team, you evolve our frontend interface
• You help us build a test strategy, including E2E and API contract tests
• You review code thoroughly and push back with good reasons, on technical and product questions alike
• You work directly with product and design: you clarify the goal and the customer value before you build

• You have 5+ years of experience with React and TypeScript on complex, data-intensive web applications
• You know frontend data architecture: UI state vs. server state, caching, invalidation and data consistency in asynchronous flows. You have hands-on experience with state management in React
• You have solid API and backend experience: API contracts, request orchestration and permission boundaries. You have designed frontend interfaces. You solve problems across the frontend/backend boundary
• You find performance bottlenecks along the whole data flow by measuring, and fix them in a targeted way
• You have built charts and dashboards for time series and KPIs that stay correct with gaps, different resolutions and time zones, and that users can read without explanation
• Your work is clean and visible: integration, E2E and contract tests, not just unit tests, small PRs that are easy to review, short updates and early warnings about risks
• You have shipped production features with agentic coding tools (e.g. Claude Code, Codex or Cursor's agent mode), not just used AI autocompletion. You break work into clear tasks, give the agent context and constraints, and review and test every change before it reaches a PR. You can explain every line you submit: the agent speeds you up, it doesn't make the decisions

Nice-to-haves

• Data and domain: you have worked with energy management, metering or IoT data (e.g. load profiles or sensor readings) or built BI, reporting or analytics SaaS. You turn domain requirements into clean data models and calculations, including time ranges, time zones, units and incomplete data
• Go and operations: you can read and change code in our Go backend, or you want to learn it. You have run applications on AWS and use tools like Sentry or Grafana to find problems in production
• Our stack: you have worked with Vite+, TanStack Router/Charts/Start/Form, Bun or Tailwind

• AI meets Industry: the next big thing
• Real impact: From day one, you make a tangible contribution to fighting climate change.
• Entrepreneurial freedom: Flat hierarchies, maximum responsibility and room to shape things. Your ideas are not just welcome, they are essential for how encentive develops.
• Modern workplace: Inspiring offices in the heart of Berlin-Mitte and in Hamburg's Sternschanze. Central, well connected and full of life.
• Flexibility: hybrid work & flexible hours: You decide how you work best.
• Sustainable mobility: We cover your Deutschlandticket, so you can get around easily and climate-friendly.
• Health & wellbeing: Access to Wellpass and Urban Sports with hundreds of fitness and wellness offers across Germany.
• Team spirit: Several offsites per year at exciting European locations, for inspiration, strategy and real team cohesion.
• Learning & development: We support you with mentoring, training and access to a strong network of founders and investors.
• Women@encentive:* Our monthly Women's* Regulars Table offers room for exchange, mutual support and new perspectives.