Christophe JUNIER
Ruby/Rails Developer & Integrator
33 years old
saint etienne (42000) France
Unemployed
Available
Passionate about web development for over 7 years, expert in Ruby and Ruby on Rails, I am ready to take on new challenges and
bring my expertise to large-scale projects.
bring my expertise to large-scale projects.
Freelance Ruby/RoR
(NDA 1A)
July 2025
to August 2025
- UX/UI and JS improvements (Hotwire and Stimulus).
- UX/UI and JS improvements (Hotwire and Stimulus).
- Refactoring/upgrading SQL database (PostgreSQL) and adding a MongoDB
database for billing management.
- Refactoring/upgrading SQL database (PostgreSQL) and adding a MongoDB
- Added unit and integration tests.
- Added unit and integration tests.
- Set up CI, preproduction/staging environment, and continuous deployment
on Heroku.
- Set up CI, preproduction/staging environment, and continuous deployment
Freelance IA
Scale AI
December 2024
to June 2025
- Fine-tuning and debugging of multiple LLMs.
- Fine-tuning and debugging of multiple LLMs.
- AI improvements through RLHF and prompt engineering.
- AI improvements through RLHF and prompt engineering.
- Gained experience with Google Cloud and Kubernetes.
- Gained experience with Google Cloud and Kubernetes.
Freelance ruby
Perpetual
September 2023
to September 2024
- Built and documented REST APIs (Swagger, Postman).
- Built and documented REST APIs (Swagger, Postman).
- Upgraded Rails (5.1 → 7).
- Upgraded Rails (5.1 → 7).
- Developed product catalog and Stripe payment integration.
- Developed product catalog and Stripe payment integration.
- Improved UX/UI and JS with Hotwire and Stimulus.
- Improved UX/UI and JS with Hotwire and Stimulus.
Développeur FullStack
Nerya
January 2023
to July 2023
- Maintenance and enhancement of a monolithic Rails 6.1 application
deployed on client side.
- Maintenance and enhancement of a monolithic Rails 6.1 application
- Technical documentation and UI redesign (white-label) aligned with multiple
client needs (multi-tenant application).
- Technical documentation and UI redesign (white-label) aligned with multiple
Développeur FullStack
Pipplet
January 2021
to January 2023
- Maintenance and enhancement of two web applications communicating via
direct and indirect APIs (Sidekiq, Redis, Whenever…).
- Wrote technical documentation and improved deployment pipeline (CI,
Heroku, Gscript, Preprod, Staging).
- Set up Docker for developers to simulate communication between both
apps.
- Upgraded technical stack (Rails 4 → 6)
- Maintenance and enhancement of two web applications communicating via
