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Benjamin LepasBL

Benjamin Lepas

Web Developer | React.js | Node.js | TypeScript

€500/day
Paris, FR
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Benjamin

Looking for a React.js / Node.js / TypeScript web developer?
Want to develop or overhaul a robust, scalable, and maintainable SaaS?

I am a web developer with 10 years of experience.
I assist startups, scale-ups, and large corporations in the design, overhaul, and evolution of their SaaS applications.

I have worked with organizations such as LVMH, DINUM (French State), Sunology, and Replick.

Some examples of impact during my assignments:
-> Front-end performance optimization: response time reduced from 2s to ~100ms
-> +30% product conversion after redesigning a legaltech SaaS
-> State platform used by 100K to 1.2M users
-> E-commerce platforms handling over 100,000 products

I can be involved in:
- Development of SaaS applications
- Overhaul of web applications
- React.js / Next.js front-end development
- Node.js / API back-end development
- TypeScript development
- JavaScript full-stack architecture
- Implementation of GraphQL or REST APIs
- Front-end performance optimization

I also have knowledge of:
- API Integrations (Shopify, third-party services)
- Offline-first / PWA architecture
- Monorepo structuring
- CI/CD implementation

Have a project?
I respond in under 1 hour.

--
Front end React js, Reactjs, Nextjs, Next js, full stack react node, full-stack node react, react.js node.js, react javascript, react typescript, react node.js, react typescript, node react, node.js react.js, back end nodejs, back-end Node js, website, website redesign, back-end migration.
  • French

    Native or bilingual

  • English

    Fluent

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

Experience

  • Groupe SAFO
    React Developer
    RETAIL (LARGE RETAILERS)
    April 2025 - April 2026 (1 year)
    Paris, France
    The SAFO Group is a food distribution and logistics group operating in the Antilles and Guyana. The company manages the entire supply chain, from international sourcing to distribution through its store networks. It has 1,000 to 5,000 employees and works with over 2,000 suppliers.

    I participated in the overhaul of the group's B2B ordering platform within a product organization composed of 3 development teams (~15 developers) with PO, PM, and QA.
    I joined the front-end team (2 leads, 3 developers).

    My responsibilities:

    - Development of the platform's interfaces and UI logic.
    - Optimization of the cart and GraphQL requests.
    - Implementation of an offline-first architecture (PWA) for a catalog of 100K+ products.
    - Implementation of optimistic UI and local cache to improve application responsiveness.
    - Collaboration with product, backend, and QA teams to ensure functional consistency and product quality.

    Impact:

    - Loading time for large carts reduced from approximately 3 seconds to near-instant user interaction thanks to front-end optimizations and offline caching.

    Here is the link to my client's website:
    Technical context:
    - React
    - Next.js
    - TypeScript
    - GraphQL
    - Node.js
    - AWS
    - TailwindCSS
    - MUI
    - PWA (offline-first)
    - Docker
    Next.js GraphQL React.js Typescript Node.js
  • LVMH
    Node.js Developer
    LUXURY GOODS
    May 2024 - July 2024 (2 months)
    Paris, France
    LVMH is the world leader in luxury, bringing together over 75 Maisons in the fashion, jewelry, wines & spirits, and cosmetics sectors.

    I participated in the implementation of the Digital Product Passport (DPP) within the group's e-commerce ecosystem.
    The DPP is a device intended to become a European regulatory obligation, ensuring product traceability and compliance throughout their lifecycle.

    My responsibilities:

    - Integration of the Digital Product Passport into the group's Shopify ecosystem.
    - Development of Node.js services for retrieving and processing traceability data.
    - Consumption of a blockchain via GraphQL API to retrieve product-related information.
    - Participation in the design and integration of technical flows necessary for DPP deployment.

    Project Objective:

    - Prepare the integration of the Digital Product Passport across the LVMH ecosystem, in anticipation of European regulatory obligations.

    Technical Context:
    - Node.js
    - TypeScript
    - GraphQL
    - Shopify
    - GCP.
    Node.js GraphQL Google Cloud Typescript Shopify
  • Replick
    Lead React / Node.js / DevOps Developer
    LEGAL
    November 2022 - August 2025 (2 years and 9 months)
    Aix-en-Provence, France
    Replick is a legaltech company that develops a SaaS platform enabling lawyers to quickly find legal arguments, statutes, and case law to draft pleadings and memoranda more effectively.
    The startup grew from 0 to 4 employees and from 0 to over 2,000 users during the assignment.

    I led the complete overhaul of the platform, initially unstable, to transform it into a robust and scalable SaaS product.

    My responsibilities:

    - Application architecture overhaul and migration to a monorepo (Nx).
    - Development of a graph-oriented mind map editor allowing legal writers to structure knowledge bases containing tens of thousands of documents.
    - Implementation of the global legal argument search used by lawyers in the application.
    - Porting of the application to Microsoft Office via Office-JS.
    - Development of APIs, the dashboard, and new product features.
    - UX/UI redesign and fixing of several dozen front-end bugs.
    - Technical supervision of developers and participation in architectural decisions.

    Impact:

    - +30% product conversion after UX and key feature redesign.
    - Triple number of impressions on the platform.
    - Production deployment of an internal tool for managing tens of mind maps and tens of thousands of legal documents.

    Technical Context:
    - React
    - Node.js
    - GraphQL
    - TypeScript
    - MongoDB
    - Scalingo
    - Cloudflare
    - Docker
    - CI/CD
    - Nx Monorepo
    - React Router
    - Office-JS
    GraphQL React.js Typescript Node.js TailwindCSS

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Education

  • Web Developer
    Open Classrooms
    2022

Skill set

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