Senior Full Stack Engineer

ABOUT THE ROLE We're a product-focused AI platform and product studio based in Munich, helping hundreds of SMEs integrate AI into their core workflows. Our platform already serves a large and fast-growing user base, and we're scaling toward the next order of magnitude. We're looking for a Senior Full Stack Engineer to join our engineering team and own some of the hardest architectural challenges we face — from multi-terabyte data synchronisation to secure, high-throughput sandbox infrastructure. This is a hybrid role based in Munich, Germany. No visa sponsorship is available — candidates must be authorised to work in Germany without employer sponsorship. WHAT YOU'LL DO - Own the most complex architectural problems 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 strong 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, enabling new systems to 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 across the codebase 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 with Node.js/Express or equivalent. - Proficiency with containerisation and orchestration using Kubernetes and Docker. - Hands-on experience with PostgreSQL, tRPC, and modern CI/CD pipelines. - Proven track record designing, scaling, and maintaining complex software architectures for high-growth products. - Experience operating at scale: large dataset synchronisation, high-volume API/LLM calls, secure multi-tenant systems. - Experience mentoring junior developers or leading a small development team. - Ability to own a product roadmap, drive technical decisions aligned with product goals, and collaborate effectively with product managers and designers. - Excellent written and verbal communication skills in a cross-functional environment. - Authorised to work in Germany without employer visa sponsorship. Nice to Have - Familiarity with AI platforms or AI workflow tooling. - Experience in the B2B SaaS or AI/ML industry. TECH STACK - Frontend: React, TypeScript - Backend: Node.js, tRPC, PostgreSQL - Infrastructure: Kubernetes, Docker, CI/CD COMPENSATION & BENEFITS - Salary range: $70,000 – $90,000 per year - Join a close-knit, high-ownership engineering team where your architectural decisions have real impact - Work on an AI platform at meaningful scale with a growing SME customer base - Hybrid work arrangement in Munich LOCATION This position is based in Munich, Germany and follows a hybrid working model. Candidates must be located in or willing to relocate to Munich. Visa sponsorship is not available.