Senior Full Stack Engineer

About the Role

We're a product-focused AI platform and product studio based in Munich, helping hundreds of SMEs integrate AI into their core workflows. Our platform already serves a large and fast-growing user base, and we're scaling toward the next order of magnitude. We're looking for a Senior Full Stack Engineer to join our engineering team and own some of the hardest architectural challenges we face — from multi-terabyte data synchronisation to secure, high-throughput sandbox infrastructure.

This is a hybrid role based in Munich, Germany. No visa sponsorship is available — candidates must be authorised to work in Germany without employer sponsorship.

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 strong focus on long-term scalability and UX.

• Design and implement systems to synchronise and index terabytes of client data while enforcing fine-grained 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 engineering team.

• Debug production incidents, identify root causes, and implement durable fixes to keep the platform stable.

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

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

What We're Looking For

Required

• 5+ years of professional experience with React and TypeScript (dealbreaker).

• 7+ years of overall professional software engineering experience.

• 2+ years of backend development experience with Node.js/Express or equivalent.

• Proficiency with containerisation and orchestration using Kubernetes and Docker.

• Hands-on experience with PostgreSQL, tRPC, and modern CI/CD pipelines.

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

• Experience operating at scale: large dataset synchronisation, high-volume API/LLM calls, secure multi-tenant systems.

• Experience mentoring junior developers or leading a small development team.

• Ability to own a product roadmap, drive technical decisions aligned with product goals, and collaborate effectively with product managers and designers.

• Excellent written and verbal communication skills in a cross-functional environment.

• Authorised to work in Germany without employer visa sponsorship.

Nice to Have

• Familiarity with AI platforms or AI workflow tooling.

• Experience in the B2B SaaS or AI/ML industry.

Tech Stack

• Frontend: React, TypeScript

• Backend: Node.js, tRPC, PostgreSQL

• Infrastructure: Kubernetes, Docker, CI/CD

Compensation & Benefits

• Salary range: $70,000 – $90,000 per year

• Join a close-knit, high-ownership engineering team where your architectural decisions have real impact

• Work on an AI platform at meaningful scale with a growing SME customer base

• Hybrid work arrangement in Munich

Location

This position is based in Munich, Germany and follows a hybrid working model. Candidates must be located in or willing to relocate to Munich. Visa sponsorship is not available.

Find Jobs in Germany on Arbeitnow