Technical consulting
Audits, architecture, team support and technical leadership to secure a project or unblock an existing application.
Full Stack Consultant · Available
Jérôme
Dhersin
Java / Spring Boot · React / Next.js · DevOps
10 years of experience building reliable websites, business applications and ERP solutions. I support small businesses around Hazebrouck and Saint-Omer from discovery to production.
JDAvailable
Hazebrouck · Saint-Omer · Remote
In numbers
10+ans
XP
3+
projets live
4×
grands comptes
FR/EN
i18n natif
About
Full Stack consultant and developer with 10 years of experience, specialising in Java / Spring, React and DevOps. I support companies from discovery to production with scalable, high-performance web solutions designed around real users.
Passionate about:
- ▸Building modern, high-performance applications
- ▸Performance optimisation and user experience
- ▸Solving complex problems
JD10 years of experience
Building performant, maintainable web applications with a strong focus on user experience.
Digital solutions for small businesses
One senior technical partner to scope, build and improve your digital tools around Hazebrouck and Saint-Omer.
Professional websites
Fast and accessible websites designed to turn local searches into qualified conversations.
Custom applications
Tools tailored to your workflows: sales, production, inventory, quotes, orders and reporting.
ERP & modernisation
New modules, API integrations and progressive modernisation of business software without disrupting operations.
Explore my services →
Available in Hazebrouck, Saint-Omer, Northern France and remotely.
Stack & skills
Core en jaune
Java (8, 11, 17, 21)· 8+ years XP
Spring Boot (2, 3)· 8+ years XP
React (16, 18)· 2+ years XP
Next.js· 1+ year XP
Angular (JS, 2, 4)· 2 years XP
PostgreSQL· 8+ years XP
Oracle· 8+ years XP
Docker· 1 year XP
Nginx· 1 year XP
Maven· 8+ years XP
GitHub Actions· 1 year XPProjects
A selection of projects showcasing my Fullstack skills — Java / Spring on the back end, React / Next.js on the front end.
Experience
2022
10/2022 — Aujourd'hui
Développeur Web — Fullstack
[L'Agent X] Mission — Supermarché Match
- Lieu:La Madeleine
- Contrat:Mission
- Equipe:1 PO, 1 QA, 3 Développeurs
- Methode:Kanban → Scrum
Projects: store backoffice, internal applications (preparations, electronic label data), and microservices feeding the drive website.
- Mentored junior developers; 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.
- Developed a React tool for real-time monitoring of Spring Integration flows.
Java 8 + 11Spring Boot 2.7ReactGraphQLPostgreSQLSpring BatchSpring Integration
2017
11/2017 — 10/2022
Développeur Web — Fullstack
[UNIS] Mission — Decathlon
- Lieu:Croix
- Contrat:Mission
- Equipe:1 Tech Lead, 1 PO, 1 QA, 4 Développeurs
- Methode:Kanban → Scrum
Project: product catalog, orders, stock and warehouse planning application used in more than 40 countries.
- Redesigned product price recalculation (Java batch): reduced runtime from 7 to 3 days, improved memory usage and error handling.
- Implemented dynamic configuration for unit and integration tests across modules.
- Provided support/run for production management app (product sheet, orders, stock, stock planning).
Java 8Spring Boot 2 (API)StrutsjQueryPostgreSQL
2017
02/2017 — 10/2017
Développeur Web — Fullstack
[UNIS] Mission — Kiabi
- Lieu:Lys-lez-Lannoy
- Contrat:Mission
- Equipe:2 PO, 1 Tech Lead, 1 QA, 3 Développeurs
- 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.
Java 8 + 11Spring MVCjQueryAngularJSAngular 2
2016
09/2016 — 04/2017
Développeur Web — Fullstack [Alternance Master 2]
[UNIS] Mission — Lyreco
- Lieu:Villeneuve d'Ascq
- Contrat:Mission
- Equipe:1 Tech Lead, 1 PO, 2 Développeurs
- 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 and web hierarchy with node drag-and-drop.
- Implemented unit tests for both modules.
Java 8Spring Boot 2 (API)AngularJSMyBatisPostgreSQL
Get in touch
A website, ERP, business application or consulting need around Hazebrouck or Saint-Omer? Tell me about your project and I will get back to you shortly.