Eileen U
New York City Metropolitan Area United States
Summary
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Rockstar🎓
Top School
Top expert inRuby on Rails Development Ecosystem
Eileen A is a seasoned software engineer with 12+ years building resilient, high-performance Ruby and Rails infrastructure, currently at PlanetScale and a Ruby core committer. A long-time Rails Core and Security team member, she drives framework-level improvements—especially in Action Pack and Active Record—and authored Rails’ system testing framework introduced in Rails 5.1. Her open-source work spans high-impact repos like rails/rails and rack, where she’s fixed regressions, tightened content-type handling, reduced allocations, and added protocol features, reflecting deep expertise in Ruby performance and server internals. Former senior engineering roles at GitHub and Shopify underline her track record of leading large upgrades, mentoring engineers, and improving testing and release practices. Unusually for an engineer with a BFA in Photography, she blends a designer’s attention to detail with low-level optimization skills, making her contributions both pragmatic and precise.
12 years of coding experience
12 years of employment as a software developer
BFA, Photography, BFA, Photography at SUNY New PaltzRuby & Ruby on Rails, Ruby & Ruby on Rails at Big Nerd Ranch
Github Skills (15)
garbage-collection10
ruby10
rack10
web-framework10
ruby-rails10
rails10
refactoring10
performance-optimization10
refactor10
testing10
software-design9
compilation8
garbage7
collector7
g7
Programming languages (7)
Github contributions (5)
rails/rails
Jun 2014 - Jan 2023
Ruby on Rails
Role in this project:
Back-end Developer
Back-end DeveloperContributions:571 reviews, 2012 commits, 1655 PRs in 8 years 8 months
Contributions summary:Eileen's commits primarily focus on resolving content type handling issues within the Rails framework. Specifically, the changes address how Rails handles content types, such as JSON, XML, and URL-encoded forms, by ensuring text/plain, and text/html content types are properly handled in controller tests. The work involved modifying the test suite, the relevant test files, and core framework files to resolve regressions.
ruby-on-railsrailsframeworkrubymvc
rack/rack
Feb 2015 - Apr 2019
A modular Ruby web server interface.
Role in this project:Back-end Developer / Performance Engineer
Back-end Developer / Performance EngineerContributions:31 commits, 19 PRs, 23 pushes in 4 years 2 months
Contributions summary:Eileen focused on optimizing the performance of the Rack library. Their contributions included reducing object allocations to improve garbage collection efficiency, specifically by freezing strings and simplifying code to avoid unnecessary object creation. Furthermore, the user fixed a bug related to `nil` query strings and implemented trailer headers for chunked responses. Their work demonstrates a deep understanding of Ruby's performance characteristics and the architecture of the Rack web server interface.
sinatraweb-serverrackrubymodular
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