Freelancer profile translated to English.
Back to original languageAbout Thomas
8 years building products used by millions of people.
E-commerce, media, mobile apps, Monoprix, Franprix, Porsche France, La Centrale.
From front, to back, APIs, databases. I go where it has impact.
What motivates me? Seeing my work used. Solving problems nobody else could crack. Growing a team.
Looking for an ambitious project with a real product vision and a team that loves technical debates.
French
Native or bilingual
Can work on-site
Paris (up to 10km)
Experience
- Groupe La CentraleSenior Fullstack EngineerJuly 2023 - October 2025 (2 years and 3 months)Paris, FranceOverhaul and modernization of the caradisiac.com website (several million monthly visitors), supporting the technological transition from legacy PHP to a React & AWS micro-frontend architecture. Development of cross-project shared fragments with La Centrale.
- Full-stack development in React and Node.js within a complex SSR micro-frontend architecture, with a page reconstruction mechanism.
- Creation of cross-project fragments: Caradisiac components integrated into La Centrale and vice-versa, ensuring group UI consistency.
- Development of AWS Lambda functions (Node.js) for user reviews management, replacing legacy PHP functionalities.
- Bug fixes and continuous evolution of legacy PHP in parallel with the overhaul, ensuring service continuity.
- Implementation of an intelligent automated SEO linking system: semantic analysis with word tree, brand/model/version detection, advanced business rules (link limits, combination prioritization, multi-page article management), complete article recreation after injection.
- Creation of an OpenSearch index for the Data team (data scientists), enabling large-scale SEO analysis.
- SQL queries (MySQL) for business needs and support for automotive journalists.
- Next.js SSR/ISR POC: study of migration to a more performant approach (technically validated).
- Analysis and redesign of the data model with POC on all JavaScript CMS (Strapi, etc.).
**Result**: Complete automation of SEO linking on all articles. OpenSearch index used by the Data team. Next.js POC validated. Reduction of legacy technical debt. - Porsche FranceFullstack EngineerFebruary 2023 - July 2023 (5 months)Paris, FranceDevelopment from scratch of a private mobile application (Apple Business Store) for managing prospects for the Porsche France sales teams, including an administration panel and an automated catalog import system.
- Complete development of the React Native application: architecture, UI, business logic.
- Design and modeling of the Firestore database (collection structure, security rules, optimized queries).
- Implementation of Firebase authentication with session management and persistence.
- Development of the web admin panel: prospect consultation, data exports for sales representatives.
- Implementation of an automated email sending system (notifications, sales follow-ups).
- Catalog import pipeline: automated processing of CSV files uploaded to GCP, synchronizing the entire Porsche vehicle catalog.
- Deployment and publication on the Apple Business Store.
**Result**: Application delivered within months, adopted by sales teams. Vehicle catalog automatically synchronized. - FranprixFullstack EngineerMay 2022 - January 2023 (8 months)Paris, FranceTakeover and overhaul of a legacy mobile application deployed on 500+ tablets for the annual Franprix franchisees' trade show (December 15, 2022, Parc Floral). Management of supplier orders with manager validation, offline functionality, and large exports to the client's IS.
- Audit and correction of all existing bugs on the legacy React Native application.
- Complete refactoring of the application architecture (Redux, components, business logic) to improve maintainability and performance.
- Development of new features: promotion system with complex business rules (discount types, application conditions).
- Contribution to the Java backend: order validation logic, generation of large XML exports (tens of thousands of lines).
- Implementation of offline management via Realm: local persistence, synchronization, network robustness.
- Local network deployment: configuration and installation on 500+ tablets with authentication by unique franchisee ID.
- On-call duty for 2 days during the trade show: real-time monitoring, bug fixing, user support.
- Post-show: backup management, data extraction, delivery of exports to the client, then application support in case of reported anomalies.
**Result**: Trade show successfully deployed, zero service interruption. Tens of thousands of products ordered. Exports delivered on time.
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Education
- Web & Apps Coding, Computer ScienceEpitech - The School of Digital Innovation2018Web & Apps Coding, Informatique
- Foreign and Regional Languages, Literatures, and Civilizations of Chinese, Bachelor's degree (L2), Chinese Language and LiteratureNational Institute of Oriental Languages and Civilizations (Inalco)2016Langues, littératures et civilisations étrangères et régionales de Chinois, Licence (L2), Langue et littérature chinoises