Senior Full Stack Engineer

About the Role

We are a bootstrapped AI platform and product studio based in Munich, Germany, serving a fast-growing base of SME customers. Our platform enables teams to connect data sources, build custom AI workflows, and deploy tailored AI assistants — without needing to be technical experts. We're now looking for a Senior Full Stack Engineer to help us scale our platform from its current user base toward 1 million users.

You'll join a small, product-focused engineering team and take real ownership of complex architectural challenges — from multi-terabyte data synchronization to secure sandbox infrastructure and high-volume LLM processing pipelines.

What You'll Do

• Own the most complex architectural problems across the platform, including multi-terabyte data synchronization 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 synchronize 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, enabling new systems to be connected within 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

Must-haves:

• 7+ years of professional software engineering experience.

• Strong hands-on experience with React, TypeScript, and PostgreSQL (including relational data modeling and query performance optimization).

• Experience with tRPC or an equivalent type-safe API communication framework.

• Proven experience designing and implementing secure, multi-tenant sandbox environments.

• Experience building systems to process millions of LLM/API calls per month with high reliability and security.

• Familiarity with the broader stack: Docker, Kubernetes, and modern CI/CD tooling.

• Willingness to work on-site in Munich, Germany (hybrid arrangement).

Nice-to-haves:

• Experience scaling complex software architectures for high-growth B2B products.

• A strong product ownership mindset with genuine attention to end-user experience.

• A passion for mentoring engineers and shaping engineering standards and processes.

• Comfort with fast-paced, high-growth environments and rapid context switching.

Compensation & Benefits

• Salary: €70,000 – €90,000 per year, depending on experience.

• Work on a product with real user impact in the growing AI/SME space.

• Small, collaborative team with significant scope for architectural influence.

• Hybrid work arrangement based in Munich.

Please note: Visa sponsorship is not available for this role. Candidates must already have the right to work in Germany.

Location

This is a hybrid role based in Munich, Germany. Regular on-site presence in Munich is required.