Jeffrey Young - Expert Software Engineer at Canonical

Jeffrey Young

Expert Software Engineer at Canonical

Buffalo, New York, United States

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Summary

👤

Senior

🎓

Top School

Jeffrey Young is a Senior Language Engineer and PhD-trained programming languages researcher with 11+ years of experience spanning compiler engineering, type theory, theorem provers, and semiconductor process work. He combines deep functional programming expertise—particularly in Haskell and GHC backend development—with hands-on systems experience from fabs to circuit layout, giving him rare end-to-end insight from silicon to code generation. At IOHK and as a contributor to the Glasgow Haskell Compiler he has improved LLVM codegen and build processes, and he continues to drive language tooling at Epic Games. Jeffrey is an open source evangelist who publishes, documents, and contributes practical fixes inspired by reading other people’s code. Comfortable diving into strictness, type systems, or low-level optimization, he thrives on problems that require both theoretical rigor and machine-level pragmatism.

11 years of coding experience

6 years of employment as a software developer

Bachelor's degree, Microelectronic Engineering, Bachelor's degree, Microelectronic Engineering at Rochester Institute of Technology

Doctor of Philosophy - PhD, Computer Science, Doctor of Philosophy - PhD, Computer Science at Oregon State University

Github Skills (5)

code-generation10

compiler-design10

haskell10

llvm10

functional-programming9

Programming languages (14)

C++SchemeCHTMLKotlinTypeScriptJavaScriptHaskell

Github contributions (5)

ghc/ghc

Dec 2021 - Dec 2022

Mirror of the Glasgow Haskell Compiler. Please submit issues and patches to GHC's Gitlab instance (https://gitlab.haskell.org/ghc/ghc). First time contributors are encouraged to get started with the newcomers info (https://gitlab.haskell.org/ghc/ghc/wikis/contributing).

Role in this project:

Back-end Developer

Contributions:301 commits in 1 year

Contributions summary:Jeffrey's contributions primarily involve refactoring and modifying the Glasgow Haskell Compiler's (GHC) code generation, specifically related to the LLVM backend. They updated the configuration settings by renaming variables and refactoring the LLVM code generation, which included moving and swapping flags, storing the LLVM version, and making the code cleaner. The user also improved the build process by removing redundant imports and applying more strictness for the LLVM config.

compilerghcgitlabhaskell

doyougnu/klister

Feb 2023 - Feb 2026

an implementation of stuck macros

Contributions:236 pushes, 10 branches in 3 years

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