Senior Full Stack Engineer

About the Role

Join a product-focused engineering team at a bootstrapped AI platform company in Munich, building secure and scalable infrastructure that brings AI tools to the heart of the SME sector. As a Senior Full Stack Engineer, you will own complex architectural challenges and help scale a platform already used by thousands of teams toward its next major growth milestone. Your work will directly shape the reliability, security, and user experience of a product with real business impact.

What You'll Do

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• Own the most complex architectural problems across the platform, including multi-terabyte data synchronization and secure sandbox infrastructure.
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• Architect, build, and ship high-quality full-stack features using React and TypeScript with a focus on long-term scalability and UX.
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• Design and implement systems to synchronize and index large volumes of client data while enforcing permissions.
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• Build infrastructure to process millions of LLM calls per month with high reliability and security.
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• Implement scalable, secure code sandbox solutions capable of spawning thousands of sandboxes per day.
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• Create base infrastructure and tooling to enable fast custom integrations with new systems.
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• Collaborate on technical roadmaps and align on architectural decisions with the development team.
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• Debug production incidents, identify root causes, and implement durable fixes to keep the platform stable.
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• Mentor junior colleagues and raise the bar through constructive, thorough code reviews.
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• Continuously improve development processes, code quality standards, and overall team performance.

What We're Looking For

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• 7+ years of professional software engineering experience with a clear track record of full-stack work, including demonstrated frontend contributions.
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• Production experience with React, TypeScript, PostgreSQL, Docker, and CI/CD pipelines.
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• Hands-on experience with tRPC, Kubernetes, and modern frontend tooling.
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• Proven ability to design, scale, and maintain complex software architectures for high-growth products.
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• Experience operating large-scale systems: large dataset synchronization, high-volume API or LLM processing, or secure multi-tenant infrastructure.
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• End-to-end ownership of substantial initiatives from conception through delivery and operation.
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• Genuine motivation to mentor engineers, conduct thorough code reviews, and shape engineering standards.
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• Strong product ownership mindset with attention to UX and long-term product success.
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• Comfortable learning quickly and thriving in a fast-paced, high-growth environment.
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• Currently based in Munich.

Compensation & Benefits

Salary range: 70,000 EUR to 90,000 EUR annually. Visa sponsorship is not available for this role.

Location

Hybrid, based in Munich, Bavaria, Germany.