Full Stack Engineer (React and TypeScript, and backend experience) in Berlin

Full-Stack Engineer

Berlin, Germany | Hybrid | Full-time

€70,000--€95,000 + significant equity

We're looking for a Full-Stack Engineer to join a growing technology team and take ownership of product features from idea to production.

This is a role for someone who enjoys real ownership, technical autonomy and building products that genuinely make a difference. You'll work closely with the CTO and a small team of experienced engineers, with plenty of influence over architecture, technology choices and how the product evolves.

What you'll do

• Own features end-to-end --- from defining the problem and designing the architecture to implementation, release and post-launch improvements.
• Make independent technical decisions across the stack, from selecting libraries and tools to shaping feature architecture.
• Build and productionise AI-powered functionality, creating reliable systems around probabilistic AI outputs.
• Develop low-latency, real-time features, including WebSockets and live collaboration.
• Contribute to desktop and mobile distribution, including code signing, releases and auto-updates.
• Build and maintain reliable CI/CD processes with traceable test evidence in a regulated healthcare environment.
• Debug, monitor and support production systems across both frontend and backend.

What we're looking forMust-have

• Strong experience with React and TypeScript.
• Solid backend experience, including API design, data modelling, relational databases and asynchronous/background processing.
• A proven track record of shipping and supporting production software.
• Strong full-stack debugging skills and a structured, root-cause-oriented approach to problem solving.
• Ability to work with a high degree of autonomy and ownership without requiring daily technical direction.
• A genuine interest in building products that are intuitive, useful and enjoyable for their users.
• Strong written English and confidence working in an async, distributed environment.
• Typically 5+ years of full-stack engineering experience with real production responsibility.

What will make you successful

You're someone who:

• Takes ownership rather than waiting for instructions.
• Enjoys solving complex problems and figuring things out independently.
• Is curious about AI, technology and the mental-health space.
• Cares about quality and thinks beyond simply getting a feature to work.
• Is comfortable making decisions and taking responsibility for the outcome.
• Communicates clearly and works well in a small, highly collaborative engineering team.

This role may not be for you if...

• Your experience is primarily frontend and you haven't owned backend systems.
• You haven't been responsible for software running in production.
• You prefer close day-to-day management and clearly prescribed tasks.
• Written communication in English is a significant challenge.

What's on offer

• €70,000--€95,000 annual salary
• Significant equity package aligned with the company's growth
• High level of technical autonomy and architectural influence
• Opportunity to work on technology with a meaningful impact on mental-health capacity
• Flexible working hours
• Hybrid working in Berlin-Mitte
• Fully remote possible for exceptional candidates
• Modern office and the equipment/tools you need to do your best work
• 28 days of annual vacation
• Permanent, full-time employment
• 6-month probation period