Senior Backend Engineer

About us At Flashbots, we're building the foundations of the future Internet and financial system. As an R&D organization, we focus on MEV through our dual engines of open research and breakthrough product development – like mev-geth, Flashbots Protect, MEV-Boost, MEV-Share, Flashblocks, and BuilderNet. Our vibe is accelerationist, exceptional, kind, and independent. We are explorers, innovators, builders, and thinkers. We thrive on action, curiosity, and impact - driving the future in an iterative way while keeping an eye towards the long term version we want to see in the world. Flashbots is searching for senior backend infrastructure engineers to join our growing L2 team. In this role, you'll work on foundational infrastructure, tackle complex technical challenges, and work with industry leading experts across scaling, MEV, and DeFi. Your contributions will shape flagship products like Rollup-Boost while driving forward essential open-source innovations. What You'll Do Lead Infrastructure Development : Lead or support development of high-performance backend infrastructure for rollups, including block builders, sequencers, and decentralized execution environments powered by TEE technology. Own Critical Infrastructure : Own key infrastructure components across CI/CD, observability, automation, and runtime performance tooling that support our production systems serving millions of users. Cross-functional Collaboration : Collaborate closely with protocol, research, and backend teams to design infrastructure that balances fast UX with decentralization goals and censorship resistance. Production Excellence : Debug production systems at the OS, network, or runtime level and drive reliability improvements across the stack to maintain our industry-leading uptime standards. Open Source Leadership : Contribute to and lead open-source infrastructure projects that advance the MEV ecosystem and blockchain scalability. Who You Are Experienced Infrastructure Engineer : 4-10 years of experience with production systems and deep understanding of infrastructure, platform engineering, or DevOps concepts at scale. Systems Programming Expert : Strong skills in Rust or Go, with the ability to build high-performance, secure systems. Bonus points if you've contributed to execution layer/node projects like Geth, Reth, or rbuilder. Excellent Communicator : Whether working independently or leading cross-functional teams, you have exceptional communication and coordination skills for our remote-first, global environment. Impact-Driven : You're motivated by solving hard problems that have asymmetric impact and strike at the core of crypto's infrastructure challenges. Nice-to-Haves Ethereum Infrastructure Experience : Experience running Ethereum infrastructure, such as clients, builders, rollup sequencers, or MEV-Boost components. Open Source Contributions : Contributed to open-source infrastructure tooling or participated in protocol engineering discussions. Trusted Execution Environments : Worked with TEEs, secure enclaves (like Intel TDX), or other trusted compute primitives - particularly relevant as we migrate our infrastructure to TEE-based systems. High-Performance Systems : Built high-throughput or latency-sensitive systems (e.g., trading infrastructure, real-time data processing). Blockchain Ecosystem Knowledge : Deep understanding of MEV, L2 scaling solutions, or DeFi protocols. Details that matter Significantly above market rate equity compensation package Unlimited PTO with a high level of freedom and autonomy for your work Attractive health coverage package for US employees $3000 Yearly budget for your individual learning and development goals Work alongside the brightest minds in the crypto space Help save the world by ensuring crypto remains decentralized, permissionless and censorship-resistant Remote working, while we have a preference for EU/US time zones, you can work from anywhere in the world Paid travel - 2 x team on-site in different parts of the world per year plus periodic travel to events At Flashbots, we are committed to building a diverse and inclusive team. We welcome applications from all qualified candidates regardless of gender, race, ethnicity, religion, sexual orientation, age, or disability status. #J-18808-Ljbffr Flashbots