Full-Stack Software Engineer

About the Role A fast-growing, seed-stage enterprise AI platform company based in Berlin is looking for a Full-Stack Software Engineer to join their small, high-impact engineering team. Founded in 2023, the company builds an all-in-one platform that enables organisations to securely adopt and integrate generative AI — including AI chat, workflows, and custom agents — across their entire operations. This is a full-time, on-site role in Berlin with substantial ownership from day one. You'll shape product features, drive architecture decisions, and ship quickly in a fast-paced early-stage environment. Visa sponsorship is available. What You'll Do Design and implement robust backend systems and APIs powering a scalable 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/ML providers. Collaborate with the team on technical architecture decisions and system design. Maintain and optimize the codebase for performance, reliability, and maintainability. Participate in rotating Support Engineer shifts, in which engineers periodically focus on supporting customers and the customer success team. What We're Looking For Required: 3+ years of full-stack web development experience. Strong proficiency with Node.js , React / Next.js , and TypeScript . Solid command of PostgreSQL and SQL — data modeling, querying, and optimization. Experience with Tailwind CSS for frontend styling and implementation. Proven track record 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. Strong CS fundamentals and communication skills across product and cross-functional teams. Willingness to participate in periodic support engineer rotations. Ability to work on-site in Berlin, Germany (visa sponsorship available). Compensation & Benefits Salary: €66,000 – €120,000 per year, depending on experience. Visa sponsorship available for eligible candidates. High degree of ownership and direct impact at an early-stage company. Opportunity to contribute to foundational architecture decisions as the team scales. Location This is a fully on-site role based in Berlin, Germany . Visa sponsorship is available for the right candidate.