Job Description Hiring: Product Engineer | Open-Source LLM DevTools | Berlin (Onsite) Berlin | €70k–€130k equity (0.1–0.35%) | Early-stage AI | ️ Full-stack ownership I'm working with a Berlin-based, VC-backed startup that's building the leading open-source platform for LLM application observability and analytics. They're seeking a Founding Product Engineer to help design, build, and launch new full-stack features on top of their existing data platform. You'll collaborate directly with the founding team to own projects end-to-end—from initial user conversations to operating features in production. This is a unique opportunity to shape the product and technology of a rapidly growing open-source project. ️ Tech Stack : TypeScript (Next.js, Tailwind, Prisma, tRPC), ClickHouse, PostgreSQL, SDKs in Python and TypeScript ️ Stage : Early traction with significant growth Offer : €70k–€130k base 0.1–0.35% equity ✈️ Relocation support to Berlin available If you're a full-stack engineer passionate about open-source and eager to take full ownership of your work, let's connect. I'd be happy to share more details about this exciting opportunity.