Justin Arthur
Lead Software Engineer at Lifesize
Austin, Texas, United States
Summary
🤩
Rockstar🎓
Top SchoolJustin Arthur is a Lead Software Engineer in Austin with 14 years of experience building performant backend systems and leading engineering teams. He has a strong track record modernizing legacy Python codebases—removing Python 2 cruft, tightening byte/hex handling, and improving maintainability—while contributing performance-focused fixes to well-known open-source projects like Electrum and aiohttp. At Lifesize he drives engineering efforts since 2016, and his prior senior roles span security-focused and e-commerce engineering at Threat X, BlackLocus, and Optaros. Justin combines hands-on optimization (string concatenation, set/init improvements, connection reuse) with deployment and DevOps sensibilities such as Unix domain socket support and Nginx integration. Colleagues rely on him for pragmatic refactors that yield measurable runtime and reliability gains. He brings a pragmatic, systems-oriented mindset that surfaces small code changes with outsized impact on production behavior.
14 years of coding experience
13 years of employment as a software developer
Robert E. Lee High School
Stackoverflow
988reputation
91kreached
12answers
0questions
rest
top-5%
angularjs
top-5%
Github Skills (37)
ec10
pytest10
python10
back-end-development10
bitcoin-wallet10
testing10
http10
bitcoin10
el10
bitcoins10
networking10
asyncio10
socket10
performance-optimization10
cryptography10
Programming languages (15)
Github contributions (5)
spesmilo/electrum-server
Jan 2016 - Jan 2016
Electrum server
Role in this project:
Back-end Developer
Back-end DeveloperContributions:19 commits, 3 PRs, 4 comments in 23 days
Contributions summary:Justin primarily focused on optimizing the `electrum-server` backend code. Their contributions included improving performance through string concatenation reduction, set initialization optimization, and the use of tuples. The user also refactored code by removing unused imports and correcting indentation issues. These changes demonstrate a focus on code quality and efficiency within the server's codebase.
bitcoinindexerelectrumelectrum-server
spesmilo/electrum
Mar 2016 - Nov 2017
Electrum Bitcoin Wallet
Role in this project:Back-end Developer
Back-end DeveloperContributions:6 commits, 5 PRs, 8 comments in 1 year 8 months
Contributions summary:Justin contributed to the Electrum Bitcoin wallet by fixing bugs, simplifying code, and removing Python 2 support. They addressed issues related to signing, command handling, and undefined references in plugins. Furthermore, the user streamlined byte/hex conversion functions and cleaned up imports to improve code maintainability and remove unnecessary dependencies.
pythonelectrumlightningwalletcryptocurrency
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