Matthew Horan
Staff Site Reliability Engineer at MongoDB
New York, New York, United States
Summary
🤩
Rockstar🎓
Top SchoolMatthew Horan is a Staff Site Reliability Engineer with 15 years of experience designing and operating cloud-native infrastructure and developer platforms for companies like Spotify, Genius Sports, and MongoDB. He blends systems programming and Kubernetes expertise with strong DevOps and CI/CD practices, having built Kubernetes operators and deployment tooling that reduced configuration surfaces by up to 90%. Matthew has led large engineering groups and platform initiatives—improving observability with SLOs, introducing follow-the-sun on-call models, and boosting developer productivity across hundreds of teams. He’s an active open-source contributor in the Cloud Foundry and Ruby ecosystems, focusing on buildpack reliability, dependency management, and cross-process session handling. Based in New York, he pairs hands-on engineering with a track record of institutionalizing practices that make large-scale systems easier to run and evolve. An understated detail: many contributions center on reproducible build and test infrastructure—work that quietly prevents outages and accelerates delivery.
15 years of coding experience
16 years of employment as a software developer
Bachelor of Science Computer Science, Bachelor of Science Computer Science at Northeastern University
Github Skills (42)
dependency-management10
url-routing10
ruby-rails10
javascript10
lib10
cloud-foundry10
python10
redis10
actioncontroller10
testing10
vb610
rails10
capybara10
webkit10
cicd10
Programming languages (21)
Github contributions (5)
thoughtbot/capybara-webkit
Mar 2012 - Mar 2017
A Capybara driver for headless WebKit to test JavaScript web apps
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:186 commits, 25 PRs, 43 pushes in 5 years
Contributions summary:Matthew contributed significantly to implementing window management features, including the ability to open, focus, and switch between new windows within the Capybara-webkit driver. They added support for finding windows by name, title, or URL, alongside implementing proper handling of session cookies across windows. Furthermore, the user's work included ensuring the proper handling of screenshots and viewport dimensions.
javascriptweb-appscapybarawebkit-headlesswebkit
redis-store/redis-store
Jan 2012 - Sep 2012
Namespaced Rack::Session, Rack::Cache, I18n and cache Redis stores for Ruby web frameworks
Role in this project:Back-end Developer
Back-end DeveloperContributions:41 commits in 7 months
Contributions summary:Matthew primarily focused on enhancing the `redis-store` library, contributing features and fixes related to Time-To-Live (TTL) support for Redis keys. They implemented new specifications and extended Redis's `set` and `setnx` functionalities to incorporate TTL options. Additionally, the user addressed a double marshalling issue and refactored several tests to improve code quality. Furthermore, the user made changes to `redis-rack`, including version updates and fixes to the session management in rack.
redisrailscachingracksession-cookie
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