Backend engineer in blockchain infrastructure

Saifuro checks payments initiated by AI agents against mandates approved by humans and returns signed decisions that receiving parties can verify. It provides escrow on Base and Solana for agent-to-agent trades, with onchain settlement in USDC, and does not hold customer funds.

• Build and own the service that monitors Base and Solana and records each approved USDC payment and escrow release exactly once, only after finality
• Match each settled payment to the decision that approved it, enabling customers’ finance teams to close the month using Saifuro’s records
• Maintain accurate records through RPC provider outages, avoiding missed or duplicate transactions when providers change
• Help shape the addition of Ethereum, Arbitrum, and Polygon and automate customers’ month-end close using the records

• Have built a backend service that reads from a blockchain on an EVM chain or Solana
• Live in one of the countries where Saifuro can hire
• Relevant experience counts even if your job title differs; work outside a job, including open source, hackathons, and personal projects, counts

Будет плюсом: experience with finality and reorgs, running your own nodes, working at an RPC or indexing provider, building payments or a ledger, knowledge of Solana’s account model or EVM client internals, Substreams, Geyser or webhook-based indexing, and on-call experience for systems that move money

• Equity: 0.25% of Saifuro, vesting
• Outside the US, pay is in USD or USDC, with offers benchmarked against the top of the local market
• US employees receive 100% coverage of medical, dental, and vision premiums; dependents receive 75% coverage.
• Outside the US, a local plan is provided through the employer of record, or $300 a month toward private cover
• 25 Days of paid vacation plus public holidays; the company closes between Christmas and New Year 14 Weeks of paid parental leave for any parent
• A laptop and $1,000 toward workspace costs
• $1,500 Per year for learning, including conferences; six to eight work events per year are planned a quarter ahead and covered by the company
• Hours are flexible, with an overlap window from 14:00 to 17:00 UTC for calls and quick questions. The rest of the hours can be arranged freely; alternative arrangements can be discussed if this window falls in the middle of the night
• This role can be combined with a job at another company if the two do not conflict