Sean Callahan
Software Engineer at Linear
Boulder, Colorado, United States
Summary
👤
Senior🎓
Top SchoolSean Callahan is a seasoned software engineer with 12 years of experience building scalable data and platform systems, currently shaping developer workflows at Linear. He’s a founding engineer-turned-platform lead who has taken startups from MVP to production-grade infrastructure, replacing Firebase with custom backends, shipping real-time sync, and standing up Kubernetes and CI/CD across organizations. At Twitter he architected and operated data APIs and streaming pipelines using Beam/Scio/Dataflow, and later led platform initiatives at Motion to centralize Kubernetes, CI, and self-hosted tooling. He contributes to open-source tooling as a backend developer (notably improving Factorio server management’s save/mod handling and storage flexibility) and favors pragmatic refactors that prevent nil pointer and compatibility issues. Based in Boulder, Sean blends deep distributed-systems expertise with hands-on developer experience improvements that accelerate engineering velocity. Colleagues describe him as a builder who moves fast without sacrificing reliability or observability.
11 years of coding experience
10 years of employment as a software developer
Bachelor of Applied Science (B.A.Sc.) Computer Science, Bachelor of Applied Science (B.A.Sc.) Computer Science at University of Colorado Boulder
English
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (8)
version-control10
error-handling10
go10
f10
io10
api8
json8
apidoc8
Programming languages (3)
Github contributions (5)
OpenFactorioServerManager/factorio-server-manager
Oct 2016 - Oct 2021
A tool to help manage Factorio multiplayer servers including mods and save games.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:13 commits, 6 PRs, 6 comments in 5 years 1 month
Contributions summary:Sean primarily focused on improving the backend functionality of the Factorio server manager. They refactored code for save file handling, moving error handling to handlers and fixing potential nil pointer issues. The user also implemented a significant change by transitioning server settings storage from a struct to a map to enhance flexibility and compatibility with future Factorio updates. Additionally, they addressed mod compatibility, improving version parsing and comparisons within the mod loading system, and optimized string handling.
gamegamesfactorio-serverfactoriofactorio-mod
sean-callahan/nginxconf
Apr 2016 - Jun 2020
Contributions:10 commits, 6 pushes, 1 branch in 4 years 3 months
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