Product Engineer (Full-Stack)

About the RoleA fast-growing, seed-stage enterprise AI platform company in Berlin is looking for a talented Full-Stack Product Engineer to join their small, high-impact engineering team. Founded in 2023 and backed by top-tier investors, the company builds a comprehensive, security-first AI platform that helps organisations securely adopt and integrate generative AI — from everyday chat and workflows to fully custom AI agents — all within a compliant, European-hosted environment.This is a full-time, on-site role in Berlin. You'll work closely with the Chief Product Officer and cross-functional teammates to own features end-to-end and ship AI-powered capabilities that drive enterprise adoption at scale.What You'll DoContribute to the development of product features across the AI platform, from technical design through to user-facing implementation.Build end-to-end solutions spanning frontend (Next.js), backend (Node.js), and database layers.Collaborate with the design team and customers to gather insights and iterate on product features.Implement user interfaces including full screens, reusable components, and complete user flows.Maintain and optimise the codebase for performance and