Axel Kingsley
Staff Software Engineer at OP Labs
Minneapolis, Minnesota, United States
Summary
🤩
Rockstar🎓
Top SchoolAxel Kingsley is a Staff Software Engineer with a decade of experience building high-performance, production-grade systems across cloud and blockchain infrastructure. He has driven real-time data and protocol performance work at companies like Blocknative, Algorand, and OP Labs, and helped scale transaction processing on the prominent Ethereum Layer-2 project Optimism by improving its transaction manager, cancellation behavior, and test coverage. Prior roles at AWS and Intel reflect deep expertise in automation, platform integration, and large-scale distributed services. Based in Minneapolis, he pairs hands-on backend engineering with mentorship and engineering-process improvement, and is comfortable operating at the intersection of low-latency systems and blockchain protocol internals. An engineer who emphasizes robust testing and thoughtful limits, he brings a pragmatic focus on observability and reliability to complex, mission-critical systems.
10 years of coding experience
11 years of employment as a software developer
Batchelors of Science Computer Science, Batchelors of Science Computer Science at Northern Michigan University
Sign Language, English
Github Skills (7)
transactionscope10
transaction10
go10
transaction-manager10
ethereum10
testing10
concurrency9
Programming languages (7)
Github contributions (5)
ethereum-optimism/optimism
Dec 2023 - Apr 2025
Optimism is Ethereum, scaled.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:1 release, 388 reviews, 188 PRs in 1 year 3 months
Contributions summary:Axel focused on enhancing the transaction manager within the Optimism project. They implemented a closed flag and associated behaviors for the SimpleTxManager, enabling the manager to refuse new transactions and cancel in-progress ones when closed. The contributions also included improving testing, particularly for the SimpleTxManager, adding additional cancel opportunities, and improving the test coverage of the manager's behavior. Moreover, the user added refactoring and additional limits for gas price.
rollupl2-scalingovmethereumblockchain
axelKingsley/project_sonitus
Jul 2015 - Jun 2017
Contributions:6 pushes, 1 branch in 1 year 11 months
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