Blockchain and Cryptocurrency Jobs

Smart Contract Engineer

Sismo - Europe, Remote
Posted: 2 months ago

Sismo leverages zero-knowledge proofs (ZKPs) to enable users to aggregate and selectively disclose personal data to apps. Our core product, , is an easy-to-integrate single sign-on (SSO) that allows apps to safely access previously unreachable data. Developers can showcase apps built with Sismo Connect on the .

Founded in 2021 with backing from over 130 of the biggest names in crypto, Sismo operates at the forefront of digital identity, web3 social, and zero-knowledge technology.

Our mission is to equip developers with the tools they need to empower users and unlock their social capital. We're dedicated to the developer community, providing support through easy-to-use libraries to help build the next generation of apps. Sismo was recognized in 2022 when we were featured in Vitalik Buterin’s list of .

When you join Sismo, you'll be part of a crypto-native team driven by a passion for privacy, decentralization, and next-gen technology. Team members are exposed to the best training, conferences, and hackathons the space has to offer. Be part of the future with Sismo.


As Sismo’s Smart Contract Engineer, you will work on the newest versions of our smart contracts and ZK circuits. In addition, you will maintain Sismo’s Solidity libraries for developers to integrate Sismo.


  • 3+ years of experience in software engineering
  • 1+ year(s) of experience building and maintaining open-source smart contracts deployed in production
  • Experience building with Foundry, Tenderly, and other advanced smart contract development tools
  • Experience or strong interest in learning ZK programming languages such as Circom or Noir
  • Fluent in English (French is a bonus)

Nice to have

  • Background in mathematics, physics or cryptography
  • Interest in web3 social


  • Strong incentives (market salary + tokens)
  • Remote-friendly
  • Participation in some of crypto’s biggest events and conferences
  • Become entrenched in the ZK community
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