Senior Fullstack Engineer; B2B SaaS Startup

• As a Senior Fullstack Engineer, you’ll play a pivotal role in turning cutting-edge AI research into intuitive web experiences that transform how teams work
• You’ll join a tight-knit, VC-backed B2B startup - calm but ambitious - where your ideas shape both product and culture
• Own the end-to-end delivery of new features and improvements in our web application: shaping everything from technical design to production release
• Write both client-side and server-side Type Script code within our well-established codebases
• Tackle complex UI challenges and optimize for performance at scale
• Work alongside designers to shape user flows, evaluate feasibility, and improve interfaces and user experience
• Partner with AI engineers to bring cutting-edge research and prototypes into production-ready features
• Contribute your perspective to product discussions, helping set direction with both technical and user impact in mind
• Set and uphold high standards for code quality, architecture, and best practices within the team
• Design and maintain robust automated tests to ensure reliability and quality at scale
• Select and configure tooling that improves developer experience and keeps our CI/CD pipeline efficient
• Proactively identify and solve technical challenges before they become blockers
• Share your expertise through code reviews, mentoring, and documentation — helping others level up and ensuring our knowledge grows as the team grows

Deep proficiency in Type Script, including advanced type-level programming

Solid understanding of fullstack development: a view framework (React or similar), HTTP APIs (GraphQL/REST), server-side Type Script (Node.js), and relational databases (Postgres or similar)
You embrace AI tools in your workflow and are driven to master emerging technologies

You thrive in fast-moving environments - seeking opportunities to learn, grow, and both give and receive feedback

Strong English skills (B2 or better);
German is a plus but not required

Ideally, you excel in a specific area of fullstack development that allows you to help others with especially challenging aspects of it - but that’s a nice-to-have, not a must
10+ years of hands-on software engineering experience, ideally building complex products in dynamic environments

Bachelor’s degree (or higher) in Computer Science or a related discipline

Curiosity about adjacent fields like Design, Product Management, Dev Ops, and AI Engineering is a plus

You’re an experienced engineer who cares deeply about craft, but even more about impact. You love clear thinking over hype, and you’re energized by the idea of turning AI research into products people actually use every dayYou champion code quality and drive best practices across the team