John Mettraux
Software Developer at Burningbox SA
Hiroshima, Hiroshima Prefecture, Japan
Summary
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SeniorJohn Mettraux is a seasoned software developer with 18 years of experience based in Hiroshima, Japan, known for hands-on backend engineering and open-source contributions. He leads the ruote project and contributes to production-grade tooling such as sidekiq-cron, where he upgraded the scheduler from rufus-scheduler to fugit and improved test reliability and performance. At Burningbox SA he continues to drive software development efforts, blending long-term project stewardship with practical code-level improvements. Comfortable refactoring, troubleshooting CI/test issues, and polishing projects, he brings a pragmatic focus on reliability and maintainability. Colleagues can expect a developer who pairs deep Ruby ecosystem knowledge with a steady, project-leader mindset and a taste for subtle but impactful infrastructure fixes.
18 years of coding experience
Stackoverflow
3,541reputation
481kreached
146answers
0questions
cron
top-5%
Github Skills (19)
scheduled-tasks10
job-scheduler10
rubygems10
sidekiq10
ruby10
sched10
task-scheduler10
job-scheduling10
testing9
cron9
scheduler9
test-automation8
macos6
ruby-on-rails6
latex6
Programming languages (10)
Github contributions (5)
sidekiq-cron/sidekiq-cron
May 2018 - Jun 2018
Scheduler / Cron for Sidekiq jobs
Role in this project:
Backend Developer
Backend DeveloperContributions:7 commits, 2 PRs, 50 comments in 1 month
Contributions summary:John focused on improving the `sidekiq-cron/sidekiq-cron` project's core functionality. They replaced the dependency on `rufus-scheduler` with `fugit`, updating the project's cron scheduling logic. In addition, the user addressed issues related to test failures by modifying the testing environment. The user also fixed typos and refactored the performance tests.
ruby-on-railsruby-gemsidekiq-workerscron-jobsrails
jmettraux/rufus-treechecker
Aug 2008 - Sep 2020
Contributions:47 commits, 1 push in 12 years 3 months
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