Freelancer profile translated to English.

Description

Passionate about artificial intelligence, CTO, Expert in setting up complex infrastructure integrating the most efficient solutions on the market! Full Stack RAILS Developer. Teaching 2 hours/week at the Ecole Des Mines de Paris.

Big tech challenges if possible :)

I am an expert in RAILS, Web, Python and have worked on applications for large companies such as BPCE, SMONEY, ORANGE as well as for startups such as Renolib, Cajoo, Sircle, SIMONE,

From €650 per day for long missions.

I am available to discuss your most ambitious projects,

Languages

English
Native or bilingual
French
Native or bilingual

Workplace preferences

Can work on-site

Paris (up to 50km), Paris (up to 10km), Lyon (up to 10km)

LEAD-IA
Senior Rails / React Developer
SOFTWARE PUBLISHING
February 2025 - June 2025 (4 months)
Paris, France
- Development of evolutions
- Progressive version upgrade of Ruby (2.5 ➝ 3.x) and Rails (5.2 ➝ 6.x), with adaptation of critical gems, redesign of obsolete middlewares, and revalidation of tests
- Migration of the PostgreSQL database, partial rewriting of the data access layer, improved indexing, and management of complex migrations with data safety
- Refactoring of critical areas towards a Clean Code architecture: decoupling services / models, dependency injection, implementation of unit and integration tests
- GDPR compliance: anonymization of sensitive data, addition of user access logs, export/deletion mechanism on request
- API security: strengthening HTTP headers, integration of rate limiting, strict validation of payloads, correction of XSS and CSRF vulnerabilities detected in audit
Ruby on Rails Fullstack React.js
MINES ParisTech
Theoretical computer science teacher
EDUCATION AND E-LEARNING
January 2020 - Today (6 years and 5 months)
Paris, France
RIING
Rails Expert
CONSULTING AND AUDITS
January 2024 - February 2025 (1 year and 1 month)
Paris, France
Complete recovery of a complex Ruby on Rails application in production for several years. As a senior developer, I carried out an in-depth audit of the application in order to identify the critical areas for improvement: performance, security, stability and scalability.

My main achievements:
- Complete technical audit followed by a clear and detailed action plan.
- Redesign of the application architecture to improve performance and reduce hosting costs.
- Implementation of an effective strategy for automated testing (RSpec) and continuous deployment (CI/CD).
- Proactive bug fixes and notable improvement in the overall stability of the application.
- Implementation of good security practices, in particular via Brakeman, Devise and Pundit.
Ruby on Rails Rails Fullstack React.js