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Product Engineer, Agent Economics

Causa Prima

madrid, comunidad de madrid, Spain Full-time June 21, 2026

Found Description

You’ll own the economics of a protocol where AI agents negotiate early-payment terms on real invoices - and much more

We’re building agent-to-agent negotiation for invoice early payment: when a buyer approves an invoice on Causa Prima, the supplier’s agent, the buyer’s agent, and potentially competing underwriters enter a sealed-bid, second-price auction that clears in seconds. The cryptography keeps bids private. The mechanism has to make truthful behavior the smart play for every participant — suppliers, buyers, financiers, and us.

That second part is your job. You’ll own the economic and market design of this protocol: how it’s priced, how it’s calibrated, who participates, and why every party keeps showing up. You’ll work directly with the founders and our Head of Product, at the intersection of mechanism design, supply chain finance, and agentic AI.

What you’ll do

  • Calibrate the mechanism. Build simulations of auction outcomes agains...

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