Staff Software Engineer – Smart Contracts

About Us

Babylon Labs is building native use cases for Bitcoin. Bitcoin is an incredible store of value, but it’s historically been difficult to unlock its broader economic productivity. Our flagship protocol, trustless Bitcoin staking, has attracted almost $6 billion native BTC TVL, and our new invention, trustless Bitcoin vault, allows native BTC to participate in DeFi protocols on any chain.

About the Job

We’re looking for a Staff Software Engineer specialized in Solidity DeFi smart contract development. You will design, develop, and maintain Solidity smart contracts for the Bitcoin vault protocol and integrate them with DeFi protocols in the Ethereum ecosystem.

Responsibilities

• Design, develop, and maintain Solidity smart contracts for the Bitcoin vault protocol.
• Collaborate with other DeFi projects to integrate the Bitcoin vault protocol with existing DeFi protocols.
• Work with the product team to ship high‑impact features across the Bitcoin vault‑based DeFi protocol.
• Establish workflow and best practices for smart contract development and work with security auditors to ensure contract security.

Qualifications

• Strong proficiency in Solidity smart contract development, with 3+ years of experience writing performant and secure smart contracts.
• Strong proficiency in smart contract development and deployment in the EVM ecosystem.
• Deep knowledge of DeFi products, with familiarity with source code of major DeFi protocols.
• Self‑driven, creative, collaborative, and thrive in ambiguity and fast‑paced environments.

Preferred qualifications

• Experience in the Bitcoin ecosystem.
• Experience building lending, stablecoin, and/or derivative‑based DEXes.
• Contributions to open‑source DeFi projects.
• Experience with DeFi product mainnet launches and upgrades.
• Knowledge of smart contract auditing practices and tools (e.g., fuzzing).