Fyodor Kupolov
Founding Principal at PVR Labs
San Diego, California, United States
Summary
👤
Senior🎓
Top SchoolFyodor Kupolov is a Founding Principal and JVM performance specialist with 13 years of experience designing high-throughput, low-latency Java systems for Google, Apple, ServiceNow and now his own consultancy, PVR Labs. He focuses on deep profiling, concurrency tuning and persistence-at-scale, and is currently building a high-concurrency distributed synchronization engine that leverages database-backed persistence for efficient data sync. His background spans core infrastructure work from Android framework development to large-scale PostgreSQL/MariaDB persistence, giving him rare end-to-end insight into platform and storage bottlenecks. Fyodor contributes to open-source tooling for backend systems—having updated Rails’ acts-as-taggable-on for Rails 4 compatibility and test robustness—demonstrating attention to legacy compatibility and testing. Colleagues describe him as a pragmatic architect who blends hands-on coding with systems-level performance optimization. Based in San Diego, he combines enterprise-grade discipline with startup agility to solve thorny scaling problems.
13 years of coding experience
24 years of employment as a software developer
Lyceum of Belarusian National Technical UniversityMaster's Degree, Master's Degree at Belarusian State University of Informatics and Radioelectronics
Github Skills (6)
activerecord10
ruby-rails10
rails10
ruby10
rspec9
computer-engineering8
Programming languages (6)
Github contributions (5)
mbleigh/acts-as-taggable-on
Apr 2013 - Sep 2014
A tagging plugin for Rails applications that allows for custom tagging along dynamic contexts.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:11 commits in 1 year 4 months
Contributions summary:Fyodor primarily focused on supporting Rails 4 compatibility within the acts-as-taggable-on gem. Their contributions involved updating code, including core modules like `core.rb`, `related.rb`, `ownership.rb`, and `tagger.rb`, to address deprecation warnings and ensure compatibility. They also made changes to the `taggable_spec.rb` and other spec files, indicating a focus on testing and maintaining the functionality of the gem. Furthermore, the user worked on integrating the tag association and fixing potential errors with saving tags.
ruby-on-railsrails-applicationsrailsrubytagging
konukhov/delta
Aug 2015 - Oct 2015
Contributions:36 commits, 18 pushes, 5 branches in 1 month
ruby-on-railstrackerrailsrubyyet-another
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