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We are building BOB, a new way for builders to experiment and innovate with usable decentralization while retaining Bitcoin security. We are seeking an experienced Senior Solidity Engineer to design and implement core smart contracts on BOB and the BOB SDK.
Your role will focus on enhancing the OP Stack bridge, refining consensus mechanisms, advancing governance, and extending the BOB SDK - including BOB Gateway, the BTC light client, and account abstraction optimized for Bitcoin. Working closely with the core team, you’ll contribute to building the BOB stack and play a leading role in technical discussions with both the core team and our community.
What you will do
- Architect and build secure smart contracts for the BOB core, research existing and cutting-edge technologies to develop new protocols (sometimes without a formal specification)
- Extend and optimize the BOB SDK including the BTC light client, account abstraction, meta transactions, and OP Stack integrations
- Ensure the security of smart contracts by applying standardized libraries, testing, verification, and supporting audits
- Engage in discussions with the core team on the on-chain strategy and feature roadmap
- Share knowledge with other team members on smart contract engineering best practices
- Drive the smart contract part of the BOB SDK by creating opportunities for other developers to contribute to the stack
- Two years or more of hands-on Solidity development experience
- One year of experience deploying smart contracts on Ethereum mainnet (or other EVM mainnets) for high-impact projects with measurable Total Value Locked (TVL)
- Deep understanding of smart contract best practices, with experience designing novel protocol functionality and architecting research-driven solutions
- Interest in Bitcoin and new Bitcoin technologies including taproot, ordinals, brc20 and BitVM
- Great communication skills in a remote setting
Nice to have
- Experience with Bitcoin script
- Experience with Rust
- Contributions to open-source projects
- Research-oriented team
- Solve novel problems
- Stock options
- Remote working
- 30-day vacation
- Allowance for a co-working space
- Yearly retreat
Distributed Crafts London, England Office
London, United Kingdom
What you need to know about the London Tech Scene
London isn't just a hub for established businesses; it's also a nursery for innovation. Boasting one of the most recognized fintech ecosystems in Europe, attracting billions in investments each year, London's success has made it a go-to destination for startups looking to make their mark. Top U.K. companies like Hoptin, Moneybox and Marshmallow have already made the city their base — yet fintech is just the beginning. From healthtech to renewable energy to cybersecurity and beyond, the city's startups are breaking new ground across a range of industries.
