I help teams build difficult software where correctness, incentives and delivery all matter.
I am a software engineer and engineering leader with more than 20 years of experience across product teams, financial systems, enterprise platforms and Ethereum infrastructure. Most recently at Spire Labs, I have been working on protocol-level interoperability, cross-chain coordination and the execution infrastructure needed to make rollups and appchains work together atomically rather than as isolated silos.
Before Spire, I worked on transaction lifecycle engineering at MetaMask, where the hard problems sit between user intent, gas pricing, simulations, transaction inclusion, private order flow and block-builder behaviour. I have also worked on enterprise Ethereum systems around Quorum, Besu and privacy-preserving networks.
If you are building wallets, transaction infrastructure, order-flow systems, rollups, appchains, private mempools, MEV-aware products, or anything where Ethereum execution quality affects the user experience, I can help you reason clearly and ship.
What I bring:
- Deep engineering experience across architecture, backend systems, blockchain infrastructure, cloud platforms and delivery practices.
- Recent protocol and interoperability experience from Spire Labs, focused on cross-chain coordination, atomic composability and Ethereum execution infrastructure.
- Practical transaction lifecycle experience from MetaMask, spanning transaction inclusion, gas pricing, block builders, MEV, simulations, order flow and private mempools.
- A product-minded approach to infrastructure: users do not care why a transaction failed, why latency changed, or why a system is hard to operate. They care that it works.
- The ability to work with founders, protocol researchers, product leads and engineering teams, translating ambiguous problems into executable technical plans.
- A bias toward small, testable, incremental delivery using the best parts of XP, TDD, BDD and continuous delivery.
I am most useful when the problem is messy: the technical path is unclear, the trade-offs are real, and the team needs someone who can simplify without dumbing things down.
If that sounds like the kind of help you need, email me at email@antonydenyer.co.uk.