We are building BOB, a hybrid L2 that combines the best of Bitcoin and Ethereum. This role focuses on designing and implementing a novel BitVM bridge with Bitcoin security. As a Senior Cryptography Engineer, you'll lead the implementation of cryptographic building blocks including SNARKs and Winternitz signatures. The position requires expertise in Rust development, advanced cryptographic techniques, and Bitcoin protocols. You'll work in a research-oriented environment, collaborating closely with the core team on protocol development and security infrastructure. The role offers opportunities to solve novel problems in blockchain technology while working remotely with a competitive benefits package including equity and generous vacation time. The ideal candidate will combine strong technical skills with excellent communication abilities and a passion for blockchain technology.