ABOUT THE ROLE
A fast-growing, self-funded AI SaaS company in Munich is looking for a Senior Full Stack Engineer to help scale an enterprise AI platform toward 1 million users. You'll join a small, product-focused engineering team building secure, scalable systems and intuitive UX that brings AI to the core of the SME sector. This is a high-ownership role where your architectural decisions will directly shape the product's trajectory.
WHAT YOU'LL DO
- Own the most complex architectural challenges across the platform — including multi-terabyte data synchronisation and secure sandbox infrastructure.
- Architect, build, and ship high-quality full-stack features using React and TypeScript, with a focus on long-term scalability and UX.
- Design and implement systems to synchronise and index terabytes of client data while enforcing fine-grained permissions.
- Build infrastructure to process millions of LLM calls per month with high reliability and security.
- Implement scalable, secure code sandbox solutions capable of spawning thousands of sandboxes per day.
- Create base infrastructure and tooling for fast custom integrations so new systems can be connected in hours.
- Collaborate on technical roadmaps and align on architectural decisions with the broader engineering team.
- Debug production incidents, identify root causes, and implement durable fixes to keep the platform stable.
- Mentor junior engineers and raise the bar through constructive, thorough code reviews.
- Continuously improve development processes, code quality standards, and overall team performance.
WHAT WE'RE LOOKING FOR
Required:
- 5+ years of professional experience with React and TypeScript (dealbreaker).
- 7+ years of overall professional software engineering experience.
- 2+ years of backend development experience (Node.js/Express or equivalent).
- Proficiency with containerisation and orchestration using Kubernetes and Docker.
- Hands-on experience with tRPC, PostgreSQL, and modern frontend tooling.
- Proven track record designing, scaling, and maintaining complex software architectures for high-growth products.
- Experience operating at scale: synchronising large datasets, handling high volumes of API/LLM calls, and building secure multi-tenant systems.
- Experience mentoring junior developers or leading a small development team.
- Ability to own the product roadmap, drive technical decisions aligned with product goals, and collaborate with product managers and designers.
- Excellent written and verbal communication skills in English.
- Authorised to work in Germany without company visa sponsorship.
Nice to Have:
- Familiarity with AI platforms or AI workflow tooling.
COMPENSATION & BENEFITS
- Salary: €70,000 – €90,000 per year (depending on experience).
- High degree of autonomy and product ownership from day one.
- Work directly with a senior engineering team on a product with real, growing traction in the SME AI space.
LOCATION
This is a hybrid role based in Munich, Germany. Candidates must be based in or willing to relocate to Munich. Visa sponsorship is not available.