You will get a Ruby & Rails version upgrade with full test coverage
Project details
I will upgrade your Ruby and/or Rails application to the latest stable version with full test coverage and minimal disruption.
With 7 years of freelance experience, I've led version upgrades including a Ruby 2 → 3 migration for a production travel booking platform.
I understand the commonpitfalls — deprecated syntax, gem incompatibilities, breaking API changes — and know how to handle them systematically.
Every upgrade includes a detailed assessment, a step-by-step migration plan, compatibility fixes, and verification through your existing test suite (or I can help set one up).
You'll receive clear documentation of all changes made.
With 7 years of freelance experience, I've led version upgrades including a Ruby 2 → 3 migration for a production travel booking platform.
I understand the commonpitfalls — deprecated syntax, gem incompatibilities, breaking API changes — and know how to handle them systematically.
Every upgrade includes a detailed assessment, a step-by-step migration plan, compatibility fixes, and verification through your existing test suite (or I can help set one up).
You'll receive clear documentation of all changes made.
Programming Languages
Ruby/Ruby on RailsCoding Expertise
Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$300
|
Standard
$1,500
|
Advanced
$3,500
|
|---|---|---|---|
| Delivery Time | 3 days | 14 days | 30 days |
Number of Revisions | 1 | 2 | 3 |
Design Customization | - | - | - |
Content Upload | - | - | - |
Responsive Design | - | - | - |
Source Code |
Frequently asked questions
About Tsubasa
Senior Ruby on Rails Engineer | Performance Optimization & Upgrades
Yokohama, Japan - 9:23 am local time
I specialize in backend performance optimization (reduced page load times by 67% on a 30M MAU service), Ruby version upgrades (led Ruby 2 → 3 migration), and architecture improvements (modular monolith with Packwerk).
Backend: Ruby on Rails, GraphQL API design, database optimization, business logic implementation
Frontend: React, TypeScript (logic-focused, not UI/design work)
Infrastructure: AWS (ECS, etc.), Terraform, Docker
I focus on writing clean, maintainable backend code and building reliable infrastructure. Best suited for backend-heavy tasks — API development, performance tuning, version upgrades, and
infrastructure work.
Based in Japan (JST / UTC+9). I prefer async communication and work well with distributed teams across time zones. I've lived in Vancouver and Taiwan, and I'm comfortable communicating in
English on a daily basis.
Feel free to reach out — happy to discuss how I can help with your project.
Steps for completing your project
After purchasing the project, send requirements so Tsubasa can start the project.
Delivery time starts when Tsubasa receives requirements from you.
Tsubasa works on your project following the steps below.
Revisions may occur after the delivery date.
Audit current Ruby/Rails version, dependencies, and test coverage
Review Gemfile, Ruby version, Rails version, and gem compatibility. Assess test suite coverage and identify potential breaking changes.
Create a detailed upgrade plan and share it for review
Document all required changes, gem updates, and deprecation fixes. Share the plan with you for approval before starting work.