Callahan Hirrel
Software Engineer, Team Lead at First Orion
Chicago, Illinois, United States
Summary
👤
Senior🎓
Top SchoolCallahan Hirrel is a software engineer and team lead based in Chicago with nine years of experience building backend systems, ETL data pipelines, and microservices. At First Orion he progressed from intern to team lead, shipping Spark ETL workflows in Scala/Python and gRPC/REST services in Go. A senior Computer Science student with a 3.98 GPA, he balances rigorous academics with open-source contributions and a capstone project that demonstrates end-to-end product ownership. His background tutoring CS and years in hands-on restaurant roles point to strong communication, teaching instincts, and practical problem-solving under pressure. He brings a pragmatic engineering style that values testable, maintainable systems and mentorship.
9 years of coding experience
4 years of employment as a software developer
Bachelor of Arts - BA, Computer Science, 3.98, Bachelor of Arts - BA, Computer Science, 3.98 at Hendrix CollegeLittle Rock Central High SchoolLyon College
Github Skills (20)
sympy9
mathematica9
discrete-mathematics9
apl9
symbolic-math9
code-golf9
wolfram-language9
mathematics8
functional-programming8
combinatorics8
symbolic-computation8
lambda-calculus8
stack-based8
programming-language7
computer-algebra-system7
Programming languages (2)
Github contributions (5)
callahanhirrel/CSCI-340-Community-Project
Jan 2018 - May 2018
Contributions:45 commits, 2 PRs, 30 pushes in 3 months
centerweb-development-projectdjangodatabaseconway
callahanhirrel/CSCI-370-Game-Dev
Jan 2019 - Apr 2019
Contributions:15 commits, 14 pushes, 1 branch in 2 months
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