Senior Full Stack Engineer

About the Role

This is a senior engineering role at a bootstrapped AI platform studio focused on bringing AI tools to the SME sector. You'll join a small, product-focused engineering team building secure, scalable infrastructure and intuitive UX for a platform already used across hundreds of companies — with ambitious growth targets ahead.

What You'll Do

• Own complex architectural challenges 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 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 for fast custom integrations, enabling new systems to be connected in hours.

• Collaborate on technical roadmaps and align on architectural decisions with the broader development team.

• Debug production incidents, identify root causes, and implement durable fixes to maintain platform stability.

• Mentor junior engineers and raise the bar through constructive, thorough code reviews.

• Continuously improve development processes, code quality standards, and team performance.

What We're Looking For

• 7+ years of professional software engineering experience with React, TypeScript, PostgreSQL, and the surrounding ecosystem (Docker, CI/CD).

• Proven track record designing, scaling, and maintaining complex software architectures for high-growth products.

• Hands-on experience with tRPC or an equivalent type-safe API communication framework, Kubernetes, and modern frontend tooling.

• Experience with relational data modelling and query performance optimisation in PostgreSQL.

• Experience operating at scale: synchronising large datasets, handling high volumes of LLM/API calls, 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 and long-term product success.

• A passion for mentoring engineers and actively shaping engineering standards and processes.

• Comfortable learning quickly and thriving in a fast-paced, high-growth environment.

Compensation & Benefits

Salary range: €70,000 – €90,000 per year. Visa sponsorship is not available for this role.

Location

Hybrid role based in Munich, Germany. On-site presence is expected.