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Younce FalsafiYF

Younce Falsafi

React.js | Next.js Developer

€500/day
Paris, FR
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Younce

I am a Frontend Engineer specializing in SaaS products and marketplaces.

I help startups and scale-ups build fast, scalable, and maintainable products.

I specialize in frontend, but I can take full-stack ownership when necessary (API, auth, payment).

What I do concretely:

  • Scalable frontend architecture (Next.js, TypeScript)
  • Performance optimization (up to -80% loading time)
  • Development of complex dashboards and data-heavy products
  • API integration (GraphQL, REST, WebSockets, Stripe)
Results achieved:

  • SaaS used byLVMH, TF1, and L'Étudiant
  • Optimized marketplace platform:12s → 2-3s (-80%)
*Complete elimination of human onboarding(direct operational gain)

*Non-technical teams made autonomousthrough internal tools

I work with a product-oriented approach: each feature must have a measurable impact.
  • French

    Native or bilingual

  • English

    Fluent

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

Experience

  • Medias France
    React | Next.js Frontend Developer
    PRESS AND MEDIA
    December 2025 - April 2026 (4 months)
    Paris, France
    Development of several landing pages and marketing websites with a strong focus on performance, SEO, and marketing team autonomy.

    Role:React | Next.js Frontend Developer

    Achievements:
    • Integration of landing pages in Next.js and TypeScript from UI mockups
    • Setup of a headless CMS (Prismic) to allow marketing teams to manage content autonomously
    • Pixel-perfect adherence to designs with a strong emphasis on UI consistency
    • Optimized responsive implementation (mobile-first)
    • Performance and rendering optimization (SEO-driven pages)
    • Rapid delivery with clean and maintainable code
    Impact:
    • Marketing team autonomous in content management (via Prismic)
    • Quick deployment of marketing pages for acquisition campaigns
    • Fluid user experience on all devices
    Stack:
    Next.js · TypeScript · Prismic · Responsive Design · SEO basics
    Next.js Developer TypeScript Developer Next.js TypeScript Frontend Development
  • Pompes funèbres Compare
    Full Stack Developer
    SOFTWARE PUBLISHING
    June 2025 - December 2025 (6 months)
    Paris, France
    Complete development of a marketplace connecting over 250 funeral service providers, with a goal of SEO acquisition and monetization.

    Role:Full-Stack Developer

    Achievements:
    • Search engine optimization:12s → 2-3s (-80%)
    • Implementation of an SEO architecture (SSR/ISR with Next.js)
    • Development of complete user flows: onboarding, authentication, profile management, offer publication
    • Stripe integration for subscription-based monetization
    • Setup of a back-office to allow the internal team to manage service providers
    • Automation of backend workflows (Firebase: Auth, Firestore, Cloud Functions)
    Impact:
    • Fully functional and monetized platform
    • Organic acquisition made viable through SEO architecture
    • Non-technical team autonomous in daily management
    • Significant improvement in user experience (-80% latency)
    Stack:

    Next.js · TypeScript · Firebase · Stripe · SSR/ISR · REST APIs
    Next.js Developer TypeScript Developer Next.js TypeScript Next.js Development
  • Heex
    React | Next.js Frontend Developer
    SOFTWARE PUBLISHING
    March 2025 - July 2025 (4 months)
    Paris, France
    Development of features with high business impact on an existing SaaS product, focusing on user engagement and autonomy.

    Role:React | Next.js Frontend Developer

    Achievements:
    • Development of an interactive onboarding allowing users to configure the product autonomously (guided tutorial)
    • Creation of a gamification system (badges, levels, conditional objectives)
    • Implementation of a dynamic pricing calculator connected to a CMS (Prismic)
    • Integration of dynamic data via GraphQL
    • Refactoring of the frontend architecture to improve maintainability and scalability
    Impact:
    • Elimination of the need for human onboarding →reduction of operational costs
    *Increased user retentionthrough gamification

    *Improved product understanding and engagement

    *More maintainable and scalable codebase


    Stack:
    Next.js · TypeScript · GraphQL · Prismic · React
    Next.js TypeScript Web Developer Frontend Development GraphQL

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Education

  • Bachelor's Degree in Web and Mobile Development
    University Paris 13
    2020

Skill set

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