Senior Full Stack Engineer

ABOUT THE ROLE Join a product-focused engineering team at a bootstrapped AI platform company in Munich, building secure and scalable infrastructure that brings AI tools to the heart of the SME sector. As a Senior Full Stack Engineer, you will own complex architectural challenges and help scale a platform already used by thousands of teams toward its next major growth milestone. Your work will directly shape the reliability, security, and user experience of a product with real business impact. 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 large volumes of client data while enforcing 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 to enable fast custom integrations with new systems. - Collaborate on technical roadmaps and align on architectural decisions with the development team. - Debug production incidents, identify root causes, and implement durable fixes to keep the platform stable. - Mentor junior colleagues 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 - 7+ years of professional software engineering experience with a clear track record of full-stack work, including demonstrated frontend contributions. - Production experience with React, TypeScript, PostgreSQL, Docker, and CI/CD pipelines. - Hands-on experience with tRPC, Kubernetes, and modern frontend tooling. - Proven ability to design, scale, and maintain complex software architectures for high-growth products. - Experience operating large-scale systems: large dataset synchronization, high-volume API or LLM processing, or secure multi-tenant infrastructure. - End-to-end ownership of substantial initiatives from conception through delivery and operation. - Genuine motivation to mentor engineers, conduct thorough code reviews, and shape engineering standards. - Strong product ownership mindset with attention to UX and long-term product success. - Comfortable learning quickly and thriving in a fast-paced, high-growth environment. - Currently based in Munich. COMPENSATION & BENEFITS Salary range: 70,000 EUR to 90,000 EUR annually. Visa sponsorship is not available for this role. LOCATION Hybrid, based in Munich, Bavaria, Germany.