Senior Full Stack Engineer

ABOUT THE ROLE Join a product-focused engineering team at a bootstrapped AI platform studio building tools that bring AI to the heart of the SME sector. As a Senior Full Stack Engineer, you'll own complex architectural challenges — from large-scale data synchronisation to secure sandbox infrastructure — helping scale the platform to its next major milestone. 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 focus on long-term scalability and UX. - Design and implement systems to synchronise and index terabytes 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 for fast custom integrations so new systems can be connected in hours. - Collaborate on technical roadmaps and align on architectural decisions with the development team. - Debug production incidents, identify root causes, and implement durable fixes. - Mentor junior engineers and drive code quality through thorough, constructive reviews. - Continuously improve development processes and engineering standards. WHAT WE'RE LOOKING FOR - 7+ years of professional software engineering experience. - Strong hands-on proficiency with React, TypeScript, PostgreSQL, Docker, and CI/CD pipelines. - Experience with tRPC or an equivalent type-safe API communication framework. - Experience with Kubernetes and modern container orchestration at scale. - Proven track record designing and scaling complex software architectures for high-growth products. - Experience synchronising large datasets, handling high-volume LLM/API call processing, and building secure multi-tenant systems. - Experience designing and implementing secure, multi-tenant sandbox environments. - Strong sense of product ownership with genuine attention to user experience. - Enthusiasm for mentoring engineers and actively shaping engineering culture and standards. - Comfortable moving quickly and learning in a fast-paced environment. COMPENSATION & BENEFITS Salary range: €70,000 – €90,000 per year. Visa sponsorship is not available for this role. LOCATION Hybrid — Munich, Bavaria, Germany. On-site presence in Munich is required.