smart contract engineer for onchain escrow

Saifuro LLC; United States; Remote; USD 90.000 - 150.000; Vollzeit

Benefits dieser Stelle

Equity 0.30% vesting for US employees

Medical, dental, vision coverage (US)

14 weeks parental leave

Learning & conferences stipend

Annual work events

Zusammenfassung

Saifuro LLC ищет инженера для разработки и поддержки escrow-контрактов на Base с возможностью развёртывания в другие сети. Вы будете отвечать за верификатор подписей, аудиторию и защиту средств, взаимодействуя с CTO и внешними аудитами перед релизами.

Требуется опыт развёртывания Solidity на мейннете, знание ERC-4337 или session keys, а также знакомство с USDC/CCTP. Гибкий график, удалённая работа по всему миру, с надбавками за обучение и развитие.

Qualifikationen

• Разработал/развернул Solidity на мейннете и в продакшне.
• Знание хранилища контракта, повторного входа и проверки подписи.
• Опыт разработки на Rust или Anchor для Solana; ERС-4337/ session keys.
• Знакомство с контрактами Circle USDC и CCTP; участие в bug bounty или security-исследованиях.
• Open-source вклад или проекты.

Aufgaben

• Проектирование, кодирование и тестирование escrow-контрактов на Base.
• Владение верификатором на подлинность подписи, аудитория и срок действия before funds move.
• Координация с CTO, аудит кода перед мейннет- релизами.
• Разработка многоцепочного escrow и развёртывание контрактов на будущих цепочках.

Kenntnisse

Solidity

Mainnet deployments

EVM knowledge

Rust / Anchor

ERC-4337 / session keys

USDC / CCTP

Security research

Open-source

Tools

Anchor framework

Solidity tooling

Jobbeschreibung

Описание:

Saifuro checks payments initiated by AI agents against mandates previously 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. Its users are developers building agents and teams selling APIs to those agents.

Задачи:

Design, code, and test the escrow contract system on Base, including signed-verdict releases, independent refunds, and safeguards preventing Saifuro from moving counterparties’ funds Own the onchain verifier that checks signatures, audience, and expiry before funds move; coordinate with the CTO, who runs the signing side and reviews the code Scope external audits before every mainnet release, address findings, and ship deployments with scripts, a pause switch, and a recovery runbook Develop milestone and multi-party escrow and deploy the contracts on additional EVM chains as future work, not a day-one requirement

Требования:

Have shipped Solidity to mainnet Live in a country where the company can hire Будет плюсом: EVM-level knowledge of storage layout, reentrancy, and signature verification; experience writing Rust or Anchor programs on Solana; experience with account abstraction (ERC-4337) or session keys for agents; knowledge of Circle’s USDC contracts and CCTP; bug bounty or security research experience; open-source work

Условия:

Equity: 0.30% of Saifuro, vesting 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 a workspace $1,500 A year for learning, including conferences Six to eight work events a year, planned a quarter ahead and paid for by the company Flexible hours, 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; the overlap window is not the working day. The team will work something out if that window falls in the middle of the employee’s night The role can be combined with a job at another company if the jobs do not conflict and the other work does not involve the company’s contracts or compete with them 40 Hours per week