Staff Solidity Engineer - MetaMask (Delegation)

Location: US, EU or Remote (excluding France)

Consensys is the leading blockchain and web3 software company founded by Joe Lubin, CEO of Consensys and Co-Founder of Ethereum. Since 2014, Consensys has been at the forefront of innovation, pioneering technological developments within the web3 ecosystem.

Through our product suite, including the MetaMask platform, Infura, Linea, Diligence, and our NFT toolkit Phosphor, we have become the trusted collaborator for users, creators, and developers on their path to build and belong in the world they want to see.

Whether building a dapp, an NFT collection, a portfolio, or a better future, the instinct to build is universal. Consensys inspires and champions the builder instinct in everyone by making web3 universally easy to use and develop on.

Our mission is to unlock the collaborative power of communities by making the decentralized web universally easy to access, use, and build on. 

You’ll get to work on the tools, infrastructure, and apps that scale these platforms to onboard one billion participants and 5 million developers. You’ll be constantly exposed to new concepts, ideas, and frameworks from your peers, and as you work on different projects — challenging you to stay at the top of your game. You’ll join a network of builders that reaches the edge of our ecosystem. Consensys alumni have moved on to become tech entrepreneurs, CEOs, and team leads at tech companies. 

About MetaMask
MetaMask is the gateway to the decentralized web. As both a crypto wallet and a development platform, our tools empower millions of users worldwide to create communities, play games, access financial services, make payments, invest, and more. With over 30 million monthly active users, we’re expanding the boundaries of what’s possible in Web3.

The Delegation Framework is a critical component of this mission. It enables developers to create flexible, secure, and composable permission structures on Ethereum and other EVM-compatible chains. By joining MetaMask’s Delegation team, you’ll help bring this framework to new heights, scaling it for millions of users across diverse use cases and platforms.

What You’ll Do

As a Staff Solidity Engineer on the Delegation team, you’ll be at the forefront of innovation, driving the development and adoption of the Delegation Framework. You will:

• Maintain and expand the Delegation Framework: Continuously improve the framework's core architecture, ensuring security, scalability, and ease of use.
• Develop cutting-edge features: Design and implement novel solutions, including new caveat enforcers, contract accounts, cross-chain capabilities, and integrations with zero-knowledge proof technologies.
• Drive adoption and usability: Collaborate with internal teams, partners, and the open-source community to ensure the framework meets diverse user needs and unlocks groundbreaking use cases.
• Research and experiment: Stay at the forefront of blockchain technology, evaluating new approaches and contributing to the evolution of Ethereum and the broader Web3 ecosystem.
• Document and support adoption: Maintain thorough documentation, tooling, and examples to facilitate seamless onboarding for developers and users.

What You Bring

We’re seeking a technically skilled and visionary engineer who shares our passion for making Web3 accessible and impactful:

Required Skills & Experience

• 5+ relevant industry experience, with 3+ years of professional experience shipping Solidity code to production, with a deep understanding of EVM mechanics and Ethereum tooling.
• Proven expertise in building secure, gas-optimized, and scalable smart contracts.
• Advanced knowledge of JavaScript/TypeScript and its application in Web3 development.
• Familiarity with key Ethereum standards and concepts, including multisig wallets, ERC-1271, ERC-4337 Account Abstraction, and ERC-7702.
• Experience with open-source software development and a strong understanding of collaborative workflows.
• Exceptional communication skills in English, both written and verbal.
• Self-driven and proactive, with a proven ability to thrive in a remote, fast-paced, and dynamic environment.

Bonus Points

• Experience implementing cross-chain solutions or working with bridges.
• Knowledge of zero-knowledge proofs and their application in blockchain development.
• Familiarity with MetaMask’s Delegation Framework or similar permission systems.

Don't meet all the requirements? Don't sweat it. We’re passionate about building a diverse team of humans and as such, if you think you've got what it takes for our chaotic-but-fun, remote-friendly, start-up environment—apply anyway, detailing your relevant transferable skills in your cover letter. While we have a pretty good idea of what we need, we're ready for you to challenge our thinking on who needs to be in this role.