### 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.