John Hamby is a Principal Software Engineer with over three decades of systems and compiler experience and 11 years in senior engineering roles, now at Microsoft and previously shaping core infrastructure at mParticle. He designs and ships pragmatic, high-performance back-end systems—rate limiting, deduplication at scale, distributed tracing, and message routing—while also architecting language tooling and compiler innovations such as IOperation and dependency reduction. Comfortable at any abstraction level, he moves between deep compiler internals and distributed platform engineering, contributing to high-profile open-source work on .NET Roslyn analyzers. Based in Port Townsend, WA, he pairs rigorous MIT-trained computer science foundations with a knack for turning complex semantic requirements into simple, complete solutions. An often-unspoken strength is his ability to teach and guide teams through language and runtime design, accelerating organizational technical capability.
11 years of coding experience
40 years of employment as a software developer
S.B. Computer Science and Engineering, S.B. Computer Science and Engineering at Massachusetts Institute of Technology
Contributions:8 commits, 4 PRs, 2 pushes in 5 months
Contributions summary:John primarily contributed to the development and testing of C# analyzers within the .NET Roslyn project. Their work involved the creation of new analyzers focused on code maintainability, specifically addressing unused private fields and ensuring correct instantiation of argument exceptions. The user implemented corresponding code fixes and unit tests to validate the functionality and robustness of these analyzers. Contributions included merging updates and resolving merge conflicts.
Contributions:351 pushes, 62 branches, 1 comment in 1 year 10 months
roslyncompilersdotnetcompilervisual-basic
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John Hamby - Principal Software Engineer at Microsoft