Cezary Baginski
Poland
Summary
🤩
Rockstar🎓
Top SchoolCezary Baginski is a seasoned tech lead and senior full-stack developer with 25 years in software development and 17 years of professional experience delivering robust systems for startups and enterprises. Comfortable in demanding business environments and fluent in English, he combines deep backend expertise (C++ since 1997, Ruby/Rails since 2008, strong PostgreSQL/MySQL skills) with modern frontend and DevOps tooling like React, Docker and CI optimisation. He has a proven track record rescuing and modernising complex, undocumented production codebases, migrating large databases with minimal downtime, and designing self-healing ETL and monitoring pipelines. An advocate and long-time practitioner of agile, TDD/BDD and Linux-first development, he also mentors teams while personally owning delivery and client outcomes. Active in prominent open-source Ruby tooling (notably significant contributions across Guard, Cucumber and Aruba), he improves test quality and reliability for tools used by millions of developers. Based in Poland, he blends hands-on engineering, strategic tech consultancy, and pragmatic business-oriented decision making.
17 years of coding experience
13 years of employment as a software developer
Did not graduate (self taught), Electronics, CS, Did not graduate (self taught), Electronics, CS at Technical University of Wroclaw
English, Polish, Japanese, English
Stackoverflow
2,095reputation
1.0mreached
69answers
0questions
Github Skills (44)
testing10
cucumber10
rspec10
test-framework10
command-line-interface10
filesystemwatcher10
ruby10
parallel-testing10
tdd10
bdd10
parallel-tests10
command-line10
guard10
rake10
file-monitoring10
Programming languages (12)
Github contributions (5)
guard/listen
May 2014 - Oct 2016
The Listen gem listens to file modifications and notifies you about the changes.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:22 releases, 386 commits, 81 PRs in 2 years 5 months
Contributions summary:Cezary primarily focused on improving the Listen gem's file modification detection, specifically addressing platform-specific issues like handling GEdit and IntelliJ editor temporary files, and Windows path name failures. They also worked on integrating the gem with Celluloid and refining logging for debugging purposes. Moreover, they added experimental *BSD* support and fixed some of the bugs to work with newer versions.
notifiesruby-gemrailsmodificationsruby
guard/guard-rspec
Oct 2014 - Sep 2016
Guard::RSpec automatically run your specs (much like autotest)
Role in this project:QA Engineer / Test Automation Engineer
QA Engineer / Test Automation EngineerContributions:12 releases, 142 commits, 53 PRs in 1 year 11 months
Contributions summary:Cezary primarily focused on updating and fixing RSpec tests within the `guard-rspec` repository. Their contributions included addressing compatibility issues with newer RSpec versions, fixing existing test failures, and ensuring the tests run correctly. These changes involved modifications across various spec files, including runner, formatter, and inspector specs, indicating a focus on maintaining the quality and reliability of the testing framework. The user also made updates related to RuboCop rules and general test cleanup.
railsrubyspecsrspecautotest
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