Nate Berkopec
Owner at The Speedshop
Tokyo, Japan
Summary
🤩
Rockstar🎓
Top SchoolNate Berkopec is a Ruby on Rails performance specialist and founder of The Speedshop with 14 years of experience helping teams scale web applications and deliver fast user experiences. Based in Tokyo, he blends hands-on back-end engineering, DevOps, and QA automation—contributing to high-profile projects like Rails, Puma, Turbolinks, and the Sentry Ruby SDK. Nate’s open-source work reveals a focus on reliability and measurable speed-ups: from benchmarking and test-suite hardening to middleware and database optimizations. He pairs a pragmatic product sensibility (NYU Business/Econ) with deep technical craft, routinely fixing subtle bugs and improving CI stability behind the scenes. If an app feels slow or flaky in production, he’s the kind of engineer who finds the bottleneck and turns it into predictable, repeatable performance.
14 years of coding experience
1 year of employment as a software developer
Bachelor's degree, Business/Managerial Economics, Bachelor's degree, Business/Managerial Economics at New York University
Github Skills (48)
application-framework10
git10
ruby-rails10
javascript10
lib10
coffeescript10
mysql10
package-development10
testing10
app-framework10
rspec10
rails10
database-administration10
sidekiq10
ruby10
Programming languages (27)
Github contributions (5)
tj/terminal-table
Dec 2014 - Jan 2023
Ruby ASCII Table Generator, simple and feature rich.
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:9 releases, 6 reviews, 67 commits in 8 years 2 months
Contributions summary:Nate primarily contributed to the maintenance and improvement of the terminal-table library. They fixed bugs related to whitespace handling and row height calculations. Furthermore, they modernized the project by updating dependencies, refactoring code, and restoring compatibility. They also implemented version updates, and corrected import issues.
ruby
puma/puma
Nov 2016 - Jan 2023
A Ruby/Rack web server built for parallelism
Role in this project:QA Engineer / Test Automation Engineer
QA Engineer / Test Automation EngineerContributions:57 releases, 290 reviews, 458 commits in 6 years 2 months
Contributions summary:Nate primarily focused on improving the test suite for the Puma web server. They implemented test case timeouts, omitted or skipped tests that were causing random failures on the CI/CD system, and made a series of changes to the test framework and helper files to improve test reliability and maintainability. They also addressed compiler warnings within the project's HTTP parsing code. These changes ultimately enhanced the quality and stability of the Puma project through more reliable testing procedures.
rubywebserverservermultithreadingrack
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