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
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Own the most complex architectural challenges across the platform — including multi-terabyte data synchronisation 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 synchronise and index terabytes of client data while enforcing fine-grained 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 for fast custom integrations so new systems can be connected in hours.
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Collaborate on technical roadmaps and align on architectural decisions with the broader engineering 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 engineers 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
Required:
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5+ years of professional experience with React and TypeScript (dealbreaker).
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7+ years of overall professional software engineering experience.
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2+ years of backend development experience (Node.js/Express or equivalent).
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Proficiency with containerisation and orchestration using Kubernetes and Docker.
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Hands-on experience with tRPC, PostgreSQL, and modern frontend tooling.
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Proven track record designing, scaling, and maintaining complex software architectures for high-growth products.
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Experience operating at scale: synchronising large datasets, handling high volumes of API/LLM calls, and building secure multi-tenant systems.
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Experience mentoring junior developers or leading a small development team.
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Ability to own the product roadmap, drive technical decisions aligned with product goals, and collaborate with product managers and designers.
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Excellent written and verbal communication skills in English.
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Authorised to work in Germany without company visa sponsorship.
Nice to Have:
- Familiarity with AI platforms or AI workflow tooling.
Compensation & Benefits
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Salary: €70,000 – €90,000 per year (depending on experience).
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High degree of autonomy and product ownership from day one.
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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.
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