Technical Co-Founder (m/w/d)
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Reach the decision-maker — $5About the role
About the Role A pre-seed B2B SaaS startup in the German public procurement (Vergabe) space is looking for a Technical Co-Founder to join as the third member of the founding team. You will build an AI-powered platform — from scratch — that helps organizations navigate public tendering processes in the DACH region. The platform is GDPR-compliant by design and leverages LLMs, RAG, and NLP to generate complete, compelling service concepts from structured office data. This is an equity-heavy co-founder role, ideal for a builder who wants real ownership and the chance to shape both the technology and the company from day one. What You'll Do Design and own the system architecture with a focus on GDPR compliance using EU-based cloud infrastructure (e.g., AWS Bedrock or Vertex AI in Frankfurt). Build the core AI engine that generates complete performance concepts and tender documents from structured data. Develop and maintain a reference database for credentials, certificates, and CVs — and integrate them dynamically into generated outputs. Implement entity resolution, reliability scoring, and confidence quantification across data pipelines. Work deeply in AI/ML (LLMs, RAG, NLP) and broadly across product engineering depending on your strengths. Set technical priorities and make architecture decisions in a small founding team. Contribute to business strategy during the pre-seed phase. What We're Looking For Required: Proven track record of building a product from zero with end-to-end technical ownership. Required: Strong full-stack development skills with hands-on experience in backend, data, and cloud architecture (production-ready). Required: Hands-on experience with LLMs, Retrieval-Augmented Generation (RAG), and NLP — this is the core of the product. Required: Experience designing GDPR-compliant architectures in EU cloud environments, particularly for NLP/LLM workloads. Pragmatic, delivery-focused mindset — ships working software over perfect systems. Genuine founder mentality: you want to build a company, not just close tickets. Good German language proficiency — procurement law and source documents are in German. Comfortable working full-time in an equity-heavy, pre-seed compensation structure. Nice to Have Familiarity with German public procurement law (Vergaberecht). Prior experience in RegTech, GovTech, or compliance-adjacent SaaS products. Background at or familiarity with AI-first SaaS companies. Compensation & Equity Equity: 15–20% co-founder stake with a standard 4-year vesting schedule and 1-year cliff. Salary: Compensation is primarily equity-based in the pre-seed phase; cash compensation will grow as funding is secured (a public funding application is currently in progress). No visa sponsorship available. Location Berlin preferred (on-site); hybrid or remote within the DACH region is negotiable. Cloud infrastructure is EU-based (e.g., Frankfurt).
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