Jérôme Dhersin
Fullstack Developer · Java / Spring · React
I help product and engineering teams ship reliable, fast, and maintainable web apps. Architecture, performance, DX, and UX focused solutions that scale.
About Me
Fullstack Developer with 9 years of experience, specializing in Java / Spring and React. I enjoy building high-performance and scalable web applications that deliver excellent user experiences. With several years of experience in software development, I am always looking for new challenges and opportunities to learn and grow.
Profile
Fullstack developer with 9 years of experience, specializing in building robust and maintainable applications.
Main Technologies:
Passionate about:
- Designing modern and high-performance applications
- Optimizing performance and user experience
- Solving complex problems
Skills
Projects
Here is a selection of projects I have worked on, showcasing my Fullstack development skills with Java / Spring and React. Each project highlights my ability to design and implement efficient and scalable solutions.
Experience
Developpeur Web - Fullstack
[L'Agent X] Mission - Supermarche Match
- Lieu:La Madeleine
- Contrat:Mission
- Equipe:1 PO, 1 QA, 3 Developpeurs
- Methode:Kanban -> Scrum
Projects: store backoffice, internal applications (preparations, electronic label data), and microservices feeding the drive website.
- Mentored junior developers; performed code reviews; pair programming; technical workshops on Java / React and TypeScript best practices.
- Migrated React 16 to React 18; adopted hooks and functional components; improved overall application performance.
- Migrated Spring Boot 2.2 to 2.7; updated major dependencies; improved overall application security.
- Rewrote technical and functional documentation to speed up onboarding for new developers.
- Developed a React tool for real-time monitoring of Spring Integration flows.
Developpeur Web - Fullstack
[UNIS] Mission - Decathlon
- Lieu:Croix
- Contrat:Mission
- Equipe:1 Tech lead, 1 PO, 1 QA, 4 Developpeurs
- Methode:Kanban -> Scrum
Project: product catalog, orders, stock and warehouse planning application used in more than 40 countries.
- Redesigned product price recalculation process (Java batch): reduced runtime from 7 days to 3 days, improved memory usage and error handling.
- Implemented dynamic configuration for unit and integration tests across application modules.
- Provided support/run for production management app (product sheet, orders, stock, stock planning).
Developpeur Web - Fullstack
[UNIS] Mission - Kiabi
- Lieu:Lys-lez-Lannoy
- Contrat:Mission
- Equipe:2 PO, 1 Tech lead, 1 QA, 3 Developpeurs
- Methode:Scrum
Projects: team task tracking dashboard, internal stock management apps, and store backoffice.
- Improved performance of leave management screen with drag-and-drop calendar interactions.
- Improved product sheet design in the mobile in-store stock management application.
- Provided support/run for Kiabi backoffice applications.
Developpeur Web - Fullstack [ALTERNANCE Master 2]
[UNIS] Mission - Lyreco
- Lieu:Villeneuve d'Ascq
- Contrat:Mission
- Equipe:1 Tech lead, 1 PO, 2 Developpeurs
- Methode:Scrum
Project: application with product hierarchy, translations, web mapping and access-rights modules, based on Treeview + drag-and-drop.
- Built supply-chain hierarchy management screen with drag-and-drop and automatic reference recalculation.
- Built mapping screen between supply-chain hierarchy and web hierarchy with node drag-and-drop.
- Implemented unit tests for both modules.
Contact Me
A project, an opportunity, or just a question? You can reach me via the form or directly through the links below.