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Guillaume LenoirGL

Guillaume Lenoir

Web Mobile & AI Developer

€480/day
Bordeaux, FR
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Guillaume

I develop custom web and mobile applications that automate your processes, accelerate your business, and improve your user experience. Specifically, I deliver a turnkey solution, ready for production: internal tool (back-office, dashboard), client application, or complete platform.

As a Senior Web & Mobile Developer, I manage projects end-to-end: functional scoping, design, architecture, implementation, testing, CI/CD, and deployment — with a simple logic: clear objective, reliable delivery, zero friction for the business.

I have worked on high-visibility products (up to 12M+ users) and demanding environments, with an approach focused on scalability, security, and maintainability: architectural refactors, large-scale migrations, performance optimization (load times, bundles), front-end audits, and quality industrialization (automated tests, code standards, monitoring).

Today, I also assist teams in integrating generative AI solutions to create concrete and profitable features:
  • AI Assistants & Business Copilots (internal support, decision support, automation)
  • AI Agents capable of executing actions (sorting, analysis, generation, processing)
  • Intelligent search in your data/documents (RAG) with reliable and traceable answers
  • AI Product Experiences: chat, suggested actions, feedback loops, cost/latency optimization
What you get (package format)
  • Defined scope + breakdown into deliverable batches
  • Robust, scalable architecture (Angular + Nx)
  • Results-oriented delivery: performance, quality, observability
  • Smooth collaboration with Product / Design / QA
If you're looking for a profile capable of transforming business needs into usable products, industrializing applications, and accelerating your delivery with AI, we can move fast.
  • French

    Native or bilingual

  • English

    Fluent

Can work on-site
Bordeaux (up to 50km)

Experience

  • Betclic
    Senior Front-end Developer
    ENTERTAINMENT AND LEISURE
    March 2023 - November 2025 (2 years and 8 months)
    Bordeaux, France
    Betclic is the #1 French online betting platform, used by over 12 million users. Committed to responsible gaming, Betclic operates under seven European regulations, ensuring security and compliance.

    Promoted to Lead Developer to design, develop, and manage a custom back-office platform for Betclic's "Safer Gaming Customer Support" team. This internal tool helps agents manage real-time alerts from data analysis on player behavior in regulated markets.

    Transitioned to a senior role within Betclic's web team, dedicated to the "Safer Gaming" department. Mission: strengthen the compliance and robustness of the webapp against the 7 European regulations.

    Participated in the development of a new generation back-office for Safer Gaming. Collaborative work with 9 developers and 5 business experts.
    Angular NgRx Agile methodology Nx Typescript
  • Betclic
    Senior Back-Office Developer
    ENTERTAINMENT AND LEISURE
    February 2025 - November 2025 (9 months)
    Bordeaux, France
    Promoted to Lead Developer to design, develop, and manage a custom back-office platform for Betclic's "Safer Gaming Customer Support" team. This internal tool helps agents manage real-time alerts from data analysis on player behavior in regulated markets.

    • Technical design and leadership of the back-office with Angular 20 and Nx.
    • Modular and scalable architecture, managing a dynamic flow based on real-time alerts.
    • Close collaboration with Safer Gaming teams to design features tailored to their needs.
    • Development focused on performance, maintainability, and compliance with business requirements.
    • Rich and user-friendly interfaces with Angular Material, integrated with Angular best practices for real-time updates.
  • Betclic
    Account management team
    March 2024 - February 2025 (11 months)
    Inter-team participation in demanding quality assurance tests. Contribution to the strategic roadmap of features and user engagement.

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Education

  • Specialization
    EPITECH UNIVERSITY
    2020
    Spécialisation
  • Technical Fundamentals
    2018
    Fondamentaux techniques

Skill set

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