Evolution and stabilization of a SaaS fleet management platform (car rental)

• Designed a fine-grained permissions engine (field-level) controlling the entire application: dynamic form generation, automatic GraphQL query construction, and access rights configuration.
• Developed a dashboard generation module fully configured by permissions.
• Created a drag & drop form editor to reorganize fields.
• Design System with Storybook to ensure creation of reusable, isolated, and testable components.

Maintenance of an internal Ruby on Rails application (MySQL/Redis) for telecom equipment deployment management

• Interconnection and optimization of workflows with various Orange services (SOAP/REST JSON API)
• Optimization of data flows (massive imports/exports, queue management with Sidekiq/Redis)
• Refactoring existing code to improve maintainability and performance (RSpec, SQL query optimization)
• Modernization of the application by adding React.js components to manage specific features (document management, data table display) via a GraphQL API

Work on GetGround.io SaaS and for Wojo

• Reinforced development of React Native mobile application
• Developed data synchronization mechanism between two backends using DynamoDB triggers and AWS Lambda APIs
• Refactored form system used on Next.js frontend
• Refactored internal SDK for data access (GraphQL, TypeScript types, cache management)

Takeover of a community platform for streamer Corobizar.

• Conversion of backend (Express) and frontend (React) to TypeScript
• Development of purchase module (Paypal, SMS, Crypto via Coinbase) and player inventory management.
• Twitch SSO and automated rewards system based on stream viewing time.
• Gamified UX through integration of refined React animations (Lootboxes, XP) with sound management.
• Real-Time Architecture: Inter-process synchronization via Redis PubSub enabling vertical backend scaling and massive WebSocket connection management.
• Centralized authentication management for Unity WebGL game access (Pokemon-like).
• Unit tests with Jest
• Docker Swarm on Digital Ocean to manage backend scaling

Occasional feature development in Elm and Elixir (Phoenix & Ecto, Event Sourcing CQRS) for Kibati SaaS invoicing platform

Development of new version of website using Ruby on Rails & React

Development of marketplace for local producers using Ruby on Rails (GraphQL-Ruby) and React (FlowType, Webpack, Apollo)

Design of a Kite-Surf social network with Ruby on Rails/Riot.js

Development of web applications using Ruby on Rails and Symfony2

Development of E-Commerce projects for large accounts in PHP and Java, system administration

Development of projects in Java with Play!Framework / ActionScript/Flex