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.