Jason Carr
Engineering Manager at Root Inc.
Colorado Springs, Colorado, United States
Summary
🤩
Rockstar🎓
Top SchoolJason Carr is an engineering leader and seasoned software engineer with 11 years of experience building developer productivity, infrastructure, and compiler-level tooling. He has led and scaled engineering teams at companies like Stitch Fix, ezCater, and Root Inc., while also contributing deep individual-contributor expertise across test automation, build systems, and AWS deployment tooling. Jason pairs strategic thinking about workflows and patterns with hands-on work—from stabilizing production processes and CLI tools to contributing to language compilers such as Pony and MLton. His open-source contributions address low-level type-safety and parsing concerns, reflecting a comfort with language internals and correctness. Based in Colorado Springs, he also directs game development for GMT Games, blending technical leadership with creative product work. He’s known for amplifying others’ productivity by finding intersections between people, process, and technology.
11 years of coding experience
14 years of employment as a software developer
BA Philosophy, BA Philosophy at Hillsdale College
Stackoverflow
204reputation
3kreached
3answers
3questions
Github Skills (20)
programming-language10
compiler-development10
type-system10
compiler-design10
language-design10
functional-programming10
actor-model10
memory-management9
stream-processing9
text-parsing8
parsing8
maven6
haskell6
conditional-compilation6
rust-cargo6
Programming languages (24)
Github contributions (5)
MLton/mlton
May 2017 - Dec 2019
The MLton repository
Role in this project:
Back-end Developer
Back-end DeveloperContributions:354 commits, 15 PRs, 82 comments in 2 years 6 months
Contributions summary:Jason primarily focused on enhancing the `mlton/mlton` repository, likely a compiler for Standard ML. Their commits showcase the addition and modification of core functionality within the `lib/mlton/basic` directory, which included adding methods to the stream and stream-parser modules. Significant changes include the implementation of stream transformers, parsing, and the addition of parsing capabilities. The user's work involved direct interaction with and updates to fundamental system components.
mltonstandard-mlsmlfunctional-programmingcompiler
ponylang/ponyc
Jul 2020 - Dec 2022
Pony is an open-source, actor-model, capabilities-secure, high performance programming language
Role in this project:Backend Developer
Backend DeveloperContributions:62 reviews, 20 commits, 17 PRs in 2 years 5 months
Contributions summary:Jason primarily worked on enhancing the Pony language compiler, `ponyc`. They focused on improving the type system, specifically addressing soundness issues related to capability guarantees and autorecover. Their contributions involved modifying code related to viewpoint adaptation, type checking, and memory management to ensure the language's safety and reliability. The user also implemented checks to prevent unsound aliasing.
actor-modelprogramming-languagepony-languagepony-sourceponyc
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.