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.

Must-haves

• Must-haves: 7+ years of professional software engineering experience.
• Must-haves: Strong hands-on experience with React, TypeScript, and PostgreSQL (including relational data modeling and query performance optimization).
• Must-haves: Experience with tRPC or an equivalent type-safe API communication framework.
• Must-haves: Proven experience designing and implementing secure, multi-tenant sandbox environments.
• Must-haves: Experience building systems to process millions of LLM/API calls per month with high reliability and security.
• Must-haves: Familiarity with the broader stack: Docker, Kubernetes, and modern CI/CD tooling.
• Must-haves: 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.