Senior/Staff Fullstack Engineer

As our Senior/Staff Fullstack Engineer, you'll ship user-facing features end to end. You'll focus on the frontend while comfortably building APIs and shaping database models. You'll collaborate daily with product design and founders to turn complex audit flows into fast, elegant product experiences.

What you'll do

• Own features across the stack: UI → API → data model → tests → rollout
• Work closely with design to turn ideas into high-quality interfaces
• Raise code quality with reviews, tests, and pragmatic performance work
• Help evolve our architecture, tooling, and developer experience

What you'll need

• 4+ years engineering experience
• Strong product mindset and ownership
• React 18+: Proficiency with modern React, hooks and concurrent features
• TypeScript: Strong typing skills, generic patterns, and complex type manipulations
• APIs: Experience building production-level APIs
• SQL: Experience modeling relational databases and implementing them

Nice to have

• PostgreSQL: Strong SQL skills, specifically with PostgreSQL. Understanding of multi-tenant architectures, indexing strategies, and migration management

What they offer

• High impact & growth: Front-row seat to scaling an AI startup with real ownership from day one
• Mission-driven culture: First-principles thinking, bold ideas, and a supportive team
• Compensation: €80–110k salary + meaningful equity
• Personal development: Learning budget for courses and conferences
• In-office setup: Central Berlin office, team lunches, retreats, flexible vacation