Prem Sichanugrist
Senior Software Engineer at KOMOJU
Tokyo, Japan
Summary
🤩
Rockstar🎓
Top SchoolPrem Sichanugrist is a Senior Software Engineer based in Tokyo with 18 years of experience building and maintaining large-scale web platforms, primarily using Ruby and Ruby on Rails. He has operated at both hands-on and lead levels—driving platform migrations to EKS and maintaining Cookpad’s global recipe infrastructure—while currently contributing to payments platform development at KOMOJU. An active open-source contributor, Prem has made substantive backend improvements to high-profile projects like rails/rails, Devise, and ActiveRecord session store, including security fixes and API-friendly enhancements. He blends deep Rails framework knowledge with practical DevOps experience, refactoring integrations and adding generators and Railties that ease adoption. Known for attention to backward-compatibility and test-suite robustness, he often tackles cross-version and dependency challenges developers face. Fluent in long-term maintenance work, he brings both legacy-system empathy and a track record of preparing libraries for future releases.
18 years of coding experience
16 years of employment as a software developer
B.Sc, Computer Science, B.Sc, Computer Science at King Mongkut's Institute of Technology LadkrabangSamsen Wittayalai School
Thai, English, Japanese
Stackoverflow
1,212reputation
110kreached
33answers
3questions
Github Skills (44)
test-automation10
ruby-rails10
debug10
devise10
apidoc10
testing10
command-line-interface10
sass10
rspec10
authentication10
user-authentication10
rails10
object-oriented-programming10
migration10
ruby10
Programming languages (18)
Github contributions (5)
rails/activerecord-session_store
Aug 2012 - Mar 2022
Active Record's Session Store extracted from Rails
Role in this project:
Backend Developer
Backend DeveloperContributions:5 releases, 1 review, 49 commits in 9 years 9 months
Contributions summary:Prem primarily contributed to the ActiveRecord session store within the Rails framework. Their work involved adding a migration generator for database table creation, renaming the storage component, and fixing ActiveRecord::Base namespacing. They also moved integration tests and refactored the code to avoid needing additional `require` statements. The user also added a Railtie for Rails integration and addressed some trim task issues.
ruby-on-railssession-storerailssession-cookieruby
thoughtbot/appraisal
May 2011 - Dec 2016
A Ruby library for testing your library against different versions of dependencies.
Role in this project:Backend Developer
Backend DeveloperContributions:4 releases, 133 commits, 17 PRs in 5 years 7 months
Contributions summary:Prem primarily focused on enhancing the `thoughtbot/appraisal` Ruby library, a tool for testing libraries against different versions of dependencies. Their contributions included refining the command execution by integrating `bundle exec` to solve gem conflicts and improve code clarity. They also modified the output of generated Gemfiles to match the DSL style, improved the test suite by updating dependencies, and added features like parsing `group` and supporting directives like `git` and `ruby`. Furthermore, they added new features like appraisal cleanup task, and fixed and adapted the library for the different Ruby versions and environments.
hamldependenciesrails-apiappraisalrubygems
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