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William FontaineWF

William Fontaine

Full-Stack Developer | TypeScript & Java

€400/day
Clermont-Ferrand, FR
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
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About William

I deliver web projects solo that usually require a small team.

Architecture, development, DevOps, deployment. I manage the entire cycle autonomously. My workflow integrates AI daily. Not a buzzword, but a real velocity driver.

3 years at NEO-FUGU, an ERP publisher for the luxury sector. **Dior, Carador, Marie Mas**. Team of 10 developers, critical systems in production, high standards for every line of code.

Currently on a mission at TerrAgree Forêt. Sole developer on a greenfield forest management app. Architecture, cadastral mapping, OAuth, complete infrastructure.

I also build my own products. ComWave (social media SaaS, solo) and Quoi Regarder (**+2,700 users**, zero marketing budget).

Stacks in production:
  • TypeScript · Nuxt, NestJS, Vue.js, PostgreSQL
  • Java · Spring Boot, Angular, NgRx

MVP, SaaS, business application, team reinforcement. Let's talk about your project.
  • French

    Native or bilingual

  • English

    Fluent

Can work on-site
Clermont-Ferrand (up to 50km), Paris (up to 50km), Lyon (up to 50km), Bordeaux (up to 50km), Toulouse (up to 50km)

Experience

  • NSE Groupe
    DevOps Consultant
    DEFENSE AND MILITARY
    June 2026 - Today (2 months)
    Vichy, France
    DevOps support for an operational IT system within a technical team.

    Scope:

    → Operational maintenance: stability, reliability, and service continuity

    → Operation of an existing production architecture

    → Reinforcing the team's DevOps capacity

    → Automation and reliability of routine operations

    Stack:DevOps, CI/CD, containerization, monitoring, automation
    CI/CD Docker DevOps Gitlab
  • TerrAgree Forêt
    Full-Stack & DevOps Developer
    ENVIRONMENTAL
    January 2026 - Today (7 months)
    Clermont-Ferrand, France
    Sole developer for TerrAppli, a forest management application for a rural investment consulting firm. Responsible for the entire lifecycle: architecture, development, deployment, and maintenance.

    Achievements:
    → Architecture and development from scratch of a multi-portal application (client + back-office)
    → Complete infrastructure setup: CI/CD, Coolify, Traefik, GitHub webhooks
    → OAuth authentication system with RBAC and action traceability
    → Integration of cadastral mapping (IGN API) and SharePoint DMS
    → Automation of business workflows with n8n (notifications, data synchronization, reporting)

    Stack:Angular, NgRx, Spring Boot, Java, PostgreSQL, Docker, Coolify, Traefik, n8n
    Spring Boot Angular n8n DevOps Full-Stack Development
  • NEO-FUGU
    Web Developer | Spring Boot | Java | Angular | TypeScript
    LUXURY GOODS
    September 2022 - September 2025 (3 years)
    Clermont-Ferrand, France
    Part of a 10-developer team at a software publisher, I contributed to the development and maintenance of a critical ERP for the luxury sector (precious metals and stones).

    Achievements:
    → Development of complex business modules for a production ERP used daily
    → Refactoring of legacy components and continuous improvement of the codebase
    → Implementation of unit and integration tests (JUnit, Mockito)
    → Working in a structured team: code reviews, CI/CD, Agile methodology

    Stack:Java, Spring Boot, Angular, NgRx, PostgreSQL, JUnit, Mockito, GitLab CI
    Full-Stack Development DevOps Spring Boot JavaScript / TypeScript Angular

Recommendations

Tony BanoTB
Pascal ReynierPR
Mathieu DacheuxMD
Tony Bano and 2 other people have recommended William

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Education

  • Master's Degree - IT Expert, Intelligent Applications and Big Data
    Hesias
    2025
  • Bachelor's Degree - Application Designer Developer
    Hesias
    2023

Skill set

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