Full-Stack Software Engineer

About the Role We're an early-stage, Berlin-based startup building an enterprise-ready, model-agnostic AI platform that helps organizations safely and flexibly roll out AI at scale — from everyday employee chat interactions to complex automations and custom agents. Our platform is used by companies across Europe and emphasizes security, compliance, and flexible deployment (cloud or on-premise). We're looking for a Full-Stack Software Engineer to join us on-site in Berlin. You'll have substantial ownership from day one, shaping product features end-to-end and contributing directly to architecture decisions in a fast-moving environment. Visa sponsorship is available. What You'll Do Design and implement robust backend systems and APIs to power our AI platform. Build end-to-end solutions spanning backend (Node.js), database layers, and frontend integration. Develop and optimize database schemas, queries, and data models for performance and scalability. Implement API endpoints and integrate with third-party services and AI providers. Collaborate on technical architecture decisions and system design alongside the broader engineering team. Maintain and optimize the codebase for performance, reliability, and long-term maintainability. Participate in rotating Support Engineer duties, where engineers regularly shift focus to support customers and the customer success team — keeping the whole team close to real user needs. What We're Looking For Required: 3+ years of full-stack web development experience. Strong hands-on experience with Node.js , React / Next.js , and TypeScript . Proficiency in PostgreSQL and SQL — data modeling, querying, and query optimization. Proficiency with Tailwind CSS for frontend styling. Experience owning features end-to-end, from conception through production deployment. Experience building AI-powered features or integrating AI/ML services into applications. Experience designing robust APIs and integrating with third-party services and AI providers. Ability and willingness to contribute to technical architecture and system design discussions. Strong CS fundamentals. Strong collaboration and communication skills across product and cross-functional teams. Willingness to work on-site in Berlin, Germany . Nice to Have: Background in enterprise SaaS or B2B productivity tooling. Familiarity with compliance, security, or data governance requirements in enterprise environments. Compensation & Benefits Salary: €66,000 – €120,000 per year, depending on experience. Visa sponsorship available for eligible candidates. Meaningful equity and ownership in a fast-growing early-stage company. High-impact role with direct influence on product and engineering direction. Location This is a full-time, on-site role based in Berlin, Germany . We are not able to accommodate fully remote arrangements for this position. Visa sponsorship is available.