Smart Contract Engineer (Rust, Solana)

About the Role

Saifuro checks payments that AI agents try to make. An agent asks to spend, we compare the request with a mandate a human approved earlier, and the answer comes back signed so the receiving side can verify it. There s escrow on Base and Solana for trades between agents, and settlement is in USDC, onchain. We never hold customer funds. The docs are public at docs.saifuro.com, and the people who use them are developers building agents and the teams selling APIs to those agents. The escrow is the one place where our code holds other people s money. USDC goes in, waits until a signed verdict says the deal is done, and comes out to the seller or back to the buyer, with no path in which Saifuro can move it. On Solana that s an Anchor program, and it would be yours: the program, the check on our signatures, the audits and the releases. Call it Solana developer, smart contract developer or Rust developer if you prefer. It s Rust. What you d be doing • The escrow program. USDC held in a vault the program owns, released only against a signed verdict, refunded without us when a deal falls through. Design, code and tests are yours. • The verifier. The program checks our signed verdict before anything moves. You own that check onchain. • Audits and releases. An external audit before every mainnet upgrade, the findings answered in the open, and an upgrade authority an auditor is comfortable with. • Parity with Base. A deal behaves the same way on both chains. You and the engineer on the Solidity side agree the spec, and the tests prove it. What we need from you • You ve written Solana programs. Anchor or native, either is fine. • You live in one of the countries we can hire in. Beyond these requirements, we ll support you in learning whatever else the role demands. If your experience is relevant but your title differs, we would still like to hear from you. Work outside a job counts too: open source, hackathons and your own projects. It helps, but isn t required, if you know ho...