Founding Engineer @ Stealth AI Recruiting Venture

You are Technical Hire #1 - the founding engineer who helps build the core product and platform from scratch. Build the Xpreso platform end-to-end (product + infrastructure), shipping weekly.

What you'll do

• Own core systems in our stack: TypeScript / Next.js (app, API routes, backend services where it makes sense) and Python / FastAPI (async services, pipelines, ML/LLM-adjacent logic)
• Build the matching engine: turn messy inputs (job needs + candidate intent) into structured signal, design ranking / scoring logic and iterate it fast with real outcomes, create feedback loops so the system gets smarter over time
• Build the data layer that makes matching possible: schemas, data models, retrieval, embeddings, evaluation, analytics, clean interfaces between conversation capture → insight → match decisions
• Integrate the ecosystem: job data feeds, ATS/HR tooling, calendars, messaging, whatever removes friction
• Partner tightly with product + GTM: join customer calls, understand pain, translate it into product, keep the system pragmatic, reliable, and secure without over-engineering

What you'll need

• Strong experience with TypeScript (Next.js) and Python (FastAPI), including async systems
• Proven ability to ship production-grade software in a fast-moving environment
• Comfort designing and building backend systems: APIs, databases, queues, integrations
• Product mindset: you simplify, you prioritize, you build what matters
• Ownership + urgency: you see problems, you fix them, you communicate clearly
• Based in Berlin and up for regular in-person work with the founding team

Nice to have

• Experience with matching, ranking, search, recommendations, or data-driven scoring
• Experience with LLM systems in production (prompting, evals, retrieval, guardrails)
• Experience with marketplace products or two-sided dynamics
• Prior early-stage startup experience

What they offer

• Massive ownership and real influence as Technical Hire #1
• Meaningful equity for building the core
• Backing from Merantix and access to a serious AI network in Berlin
• A founder team that moves fast and hates theatre