Causa Prima is a B2B payments network that connects buyers and suppliers so AI agents can automatically handle invoicing, dispute resolution, and payment-term negotiations.
Build the Future of FinanceEvery year, $90 trillion moves between businesses — managed through duct-taped workflows, manual data entry, and spreadsheets. 68% of companies still key invoice data by hand. Trillions sit trapped as dead working capital.Causa Prima is building the first agentic AI network for finance operations. Autonomous agents that don't just automate tasks — they negotiate across company boundaries, resolve disputes in real-time, and make financial decisions with real judgment. Not another dashboard. Not another workflow tool. A system that acts.The real unlock is what happens at scale: every company that joins makes the network smarter. Agents negotiate with each other across the supply chain. A context graph captures the why behind every financial decision — creating a compounding data moat no competitor can replicate.Why Join Us🏗️ Ground floor of a category-defining company You won't maintain someone else's codebase. You'll make foundational decisions that shape the product, the architecture, and the culture for years to come.🧠 World-class founders Three founders with complementary strengths across supply chain finance (Taulia — acquired by SAP), tokenization infrastructure (Centrifuge), and security-first fintech architecture (Oak Security, Finoa). Together: 10 startups, $400M+ raised, $bn of assets under management, 2 unicorns built.💎 Meaningful equity, not token grants All employees receive generous equity We believe in real ownership for the people who take the earliest risk.⚡ Build with the best tools TypeScript · Python · LangGraph · LlamaIndex · Neo4j · PostgreSQL · Redis · React — chosen for the problems we're solving, not for trend-following.📍 Madrid & Munich We believe the best early-stage work happens in person. Our hubs are in Madrid and Munich, with regular travel between the two.Open Positions (4) Filters: Reset filtersDepartmentAll DepartmentsENGINEERING (4)Employment TypeAll Employment TypesFull time (4)LocationAll LocationsMadrid (2)Munich (2)Location TypeAll Location TypesOn-site (4)No filters appliedENGINEERINGSenior AI / LLM Agent Engineer ENGINEERING • Madrid • Full time • On-siteSenior AI / LLM Agent Engineer ENGINEERING • Munich • Full time • On-siteSenior Backend / Platform Engineer ENGINEERING • Madrid • Full time • On-siteSenior Backend / Platform Engineer ENGINEERING • Munich • Full time • On-siteHow We Work🏢 In-person first The best early-stage work happens face-to-face. Primary hub in Madrid, secondary hub in Munich. Expect regular travel between locations.🚀 Small team, big ownership Three founders and a small founding team. Every person has direct influence on product, architecture, and company direction. No middle management, no politics.💰 Equity is real ESOP (in US Delaware Inc.) 4-year vesting, 1-year cliff. NSOs or Double-Trigger RSUs for international employees.Who We AreA small, intense, wildly talented team that values craft over credentials and results over rituals.🦄 Defiantly anti-ordinary Be authentic. Be weird. If we're like everyone else, we'll build what everyone else builds. We stay strange and wild.💥 Fucking impact We put in the effort, reward the outcomes, and create momentum for our customers. We try, and revert if needed.⚡ High agency We don't wait for permission. We're a collection of humans and agents — resourceful, biased toward action, full of integrity, deeply competent. Know your shit.🤝 Zero assholes We challenge ideas ruthlessly, but treat the humans behind them with radical respect. Ego is the enemy; the problem is the target. Gente buena y buena gente.🗣️ Just challenge Silence is a setback. We don't "polite" ourselves into mediocrity. Truth-seeking is a team sport and it requires the courage to speak up.📝 Agreements, not expectations Clear is kind. Unclear is unkind. We don't hope people "get it" — we make explicit agreements.How to ApplyApply with your CV and a short note about why you are interested. No cover letter templates — just tell us what gets you excited about what we're building.Don't see a perfect fit? Reach out anyway. We're always interested in exceptional people.