sayf Jobs

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Senior Solidity Engineer

$72k - $100k est.

This job is closed

sayf isn’t just a crypto wallet or password manager, it’s a complete identity management platform that puts users in control. We believe real change starts with individuals controlling their identity and not a few mega-corporations. With sayf, people can control what information to share and what not to share, always and forever.

sayf is powered by Decentralized Identifiers (DIDs) and is a platform for DID information management. sayf is very web3 and needs a few great Solidity developers led by the Principal Web3 Engineer. As the Solidity Engineer, you will work with the lead architects and web2 engineers on a complete solution for the various parts of the platform that touch the blockchain. Come join us at sayf and help everyone gain control of their identity.

Job Description

In partnership with a world-class team of decentralized system and client engineers, you will be responsible for the Web3 applications for a groundbreaking consumer identity application.

The Solidity Engineer is a technology leader with in-depth knowledge of the Web3 platform and best practices. This high-impact role will drive the development and continued improvement of our blockchain platform. You will be working with other front-end, mobile, and backend developers to help define the application architecture.


  • Leverage Web3 expertise to help define, deliver, and continue to evolve our blockchain application platform roadmap.
  • Identify any gaps in our existing Web3 architecture. Drive alignment on how to address such gaps and lead the delivery of high-leverage solutions.
  • Provide feedback on technical designs and ensure a scalable, maintainable smart contract architecture.
  • Mentor blockchain engineers at all levels.
  • Evangelize Web3 best practices across the organization, especially to product engineering teams.
  • Partner with various stakeholders to understand the needs of the business and define platform requirements.
  • Be a go-to person for complex smart-contract development issues.


  • 2-3 years in Solidity, others accepted.
  • Experience in Defi and NFT contracts.
  • Test-Driven. You feel bad about having incomplete test coverage.
  • Bonus for experience in lower-level EVM programming languages such as Yul or LLL
  • Interest and experience in gas golfing
  • Bonus with MEV, private mem pools, and transaction aggregation
  • Expert knowledge in implementing TheGraph, Chainlink, bridges


All your information will be kept confidential according to EEO guidelines.

sayf offers a wide range of benefits to U.S.-based employees, including medical, dental, and vision insurance, 401(k) program with employer match, generous time off for vacation, sick time, and parental leave. sayf's benefits prioritize employee wellness and progressive support to our diverse workforce.

sayf focuses on Security, Enterprise Security, Cyber Security, and Blockchain / Cryptocurrency. Their company has offices in Los Angeles, New York City, and San Francisco. They have a small team that's between 1-10 employees.

You can view their website at or find them on LinkedIn.