Harry Markley
Senior Software Engineer at OP Labs
Los Angeles Metropolitan Area United States
Summary
🤩
Rockstar🎓
Top SchoolHarry Markley is a senior software engineer with 8 years of experience building scalable full-stack systems, currently contributing to OP Labs after a multi-year engineering stint at Google. He specializes in web3 and crypto infrastructure—contributing to Optimism by improving bridge logic, refactoring for solidity migration, and implementing an authenticated Faucet contract—while shipping production services at scale. Based in Los Angeles, he pairs strong backend expertise with hands-on frontend work and a history of building secure APIs and calculation engines from earlier roles. Harry blends enterprise-grade reliability learned at OSIsoft and Blend with fast-moving decentralized application development, and he maintains active side projects like AVAXCryptoAdz to explore NFT and L2 use cases. Colleagues know him for clean, maintainable code and pragmatic fixes that reduce unexpected behavior in critical bridging paths.
9 years of coding experience
11 years of employment as a software developer
Computer Software Engineering, Computer Software Engineering at Hack ReactorBachelor of Science (BS), Mechanical Engineering, 3.78, Bachelor of Science (BS), Mechanical Engineering, 3.78 at Arizona State University
Github Skills (6)
smart-contracts10
solidity10
rollupjs10
opt10
ethereum10
optim10
Programming languages (7)
Github contributions (5)
ethereum-optimism/optimism
Apr 2023 - Apr 2025
Optimism is Ethereum, scaled.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:38 reviews, 44 PRs, 196 pushes in 2 years
Contributions summary:Harry focused on modifying the `StandardBridgeAdapter.ts` file, likely to improve the bridging functionality for the Optimism platform. They fixed errors and addressed unexpected behaviors, enhancing the stability and robustness of the bridging logic. Further contributions involved refactoring and linting the code, suggesting a focus on code quality and maintainability. This involved a migration to Solidity, and an initial implementation of the Faucet smart contract, including features for authentication and authorization of drips.
ethereumovmrollupl2-scaling
ethereum-optimism/superchainerc20-starter
Oct 2024 - Jun 2025
A starter kit for deploying and testing SuperchainERC20 tokens
Contributions:4 reviews, 48 PRs, 122 pushes in 7 months
testing
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