Founding Engineer (Stealth AI Recruiting Venture)

Join a stealth AI recruiting venture as the Founding Engineer. You will be the first technical hire, responsible for building the core product and platform from scratch. Your tasks will include developing the Xpreso platform end-to-end, owning core systems in the stack, designing ranking/scoring logic, creating feedback loops, and ensuring the system is pragmatic, reliable, and secure. You should have strong experience with TypeScript (Next.js) and Python (FastAPI), a product mindset, and prior early-stage startup experience. The position is based in Berlin and requires regular in-person work with the founding team.

• Construire la plateforme Xpreso de bout en bout, en expédiant des mises à jour hebdomadaires.
• Posséder les systèmes centraux de la pile technologique, y compris TypeScript / Next.js et Python / FastAPI.
• Transformer des entrées désordonnées en signaux structurés et concevoir la logique de classement / de notation.
• Strong experience with TypeScript (Next.js) and Python (FastAPI), including async systems
• Product mindset: you simplify, you prioritize, you build what matters
• Based in Berlin and up for regular in-person work with the founding team
• Ownership + urgency: you see problems, you fix them, you communicate clearly
• Proven ability to ship production-grade software in a fast-moving environment
• Comfort designing and building backend systems: APIs, databases, queues, integrations
• Prior early-stage startup experience (or you’ve operated like it inside a bigger place)
• Experience with analytics instrumentation and experimentation loops
• Experience with marketplace products or two-sided dynamics
• Experience with LLM systems in production (prompting, evals, retrieval, guardrails)
• Experience with matching, ranking, search, recommendations, or data-driven scoring