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Cedric FonsatCF

Cedric Fonsat

Mobile & SaaS Developer | React Native · Next.js

€350/day
Marseille, FR
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Cedric

I transform your ideas into digital products that work, from mockups to production deployment.

Specializing in mobile app development (Expo React Native/Supabase) and SaaS platforms (Next.js), I support startups and SMEs looking to quickly launch a solid MVP or evolve their existing product.

What I can build for you:
  • Complete mobile application (iOS & Android) with authentication, payments, and push notifications
  • Next.js SaaS with Supabase or Node.js/Express backend, PostgreSQL database
  • Integration of payment solutions (Stripe, RevenueCat)
  • Deployment and production rollout (VPS, Vercel, App Store)
Recent projects: Healance (SaaS platform, CTO), Lumagos (Customer Review Collection SaaS), AppShotter (Mobile app store screenshot creation SaaS)

Available remotely · Responsive · On-time delivery.
  • French

    Native or bilingual

  • English

    Fluent

Remote only
Primarily works remotely

Experience

  • AppShotter
    Founder & CTO
    SOFTWARE PUBLISHING
    May 2026 - Today (3 months)
    AppShotter - AI Localization Platform for App Store Screenshots

    Context & Challenges
    • Eliminate the asset localization bottleneck: App developers spend 3+ hours per release manually creating and duplicating screenshots for each language on the App Store and Google Play, hindering their international shipping cycle.
    • Challenge: Industrialize the creation and localization of screenshots in a frictionless workflow, automate contextual visual translation, and enable template reusability for each release with zero overhead.
    Strategic Responsibilities
    • Visual Creation & Design System: Intuitive editor to compose App Store/Play Store screenshots once, native integration of pre-optimized templates with exact store dimensions, versioning infrastructure for tracking and multi-release reuse.
    • AI Intelligence & Automatic Localization: Contextual translation engine that understands visual specifics (text hierarchy, micro-copy, CTAs), parallel multi-language generation, intelligent content adaptation to respect store guidelines and cultural nuances.
    • Multi-store Export & Asset Management: Automated export pipeline generating exact formats (sizes, resolutions, metadata) for iOS App Store and Android Google Play Store, direct delivery of upload-ready assets.
    Results
    • Drastic reduction in international shipping time: Workflow compressed from 3+ hours per release to 5 minutes, multiplying the number of supported languages without overload. Developers can ship globally at the same pace as in single-language.
    • Zero friction localization: AI eliminates the need for freelancers/external translators, no more Figma duplication or manual management. Infinitely reusable templates reduce friction and costs with each update, scalable for 1 app or 50 client apps.
    Stripe API OpenAI API Next.js Developer BetterAuth Prisma ORM
  • Lumagos (QRfeedback)
    Co-founder
    SOFTWARE PUBLISHING
    April 2025 - Today (1 year and 4 months)
    Lumagos - Intelligent Customer Feedback Platform

    Context & Challenges
    • Democratize real-time customer feedback collection via QR codes or simple links to accelerate continuous improvement of products/services/teams.
    • Challenge: Simplify feedback access, intelligently analyze data, and automate insight tracking for maximum actionability.
    Strategic Responsibilities
    • Capture System: Deployment of dynamic QR codes, secure backend infrastructure with PostgreSQL/Prisma for complete feedback traceability
    • Artificial Intelligence & Analytics: Implementation of AI insights for automatic theme extraction, sentiment analysis, and priority action recommendations
    • Authentication & Security: Integration of SSO (Google, Apple, Microsoft) for simplified user access, 2FA on the admin side for sensitive data protection
    • Automation & Deployment: Setup of CI/CD pipelines with GitHub Actions, production deployment on Debian VPS with real-time internal notifications
    Results
    • Frictionless feedback system with 10x faster capture, multiplying customer participation rate
    • Actionable intelligence: AI automatically identifies critical trends and recommends improvement priorities, reducing analysis time by 70%
    • Robust and secure production infrastructure: multi-level authentication, complete workflow automation
    Stripe API SAAS OpenAI API QR code VPS
  • Healance SAS
    CTO / Lead Developer
    MEDICAL
    December 2024 - February 2026 (1 year and 2 months)

    Frontend Development

    • Creation of performant and responsive web interfaces with Next.js (TypeScript).
    • State management with Redux for complex data flows.
    • Integration of a dynamic PDF document generation system from user data.
    • Use of Shadcn/UI and Tailwind CSS for modular and maintainable design.
    • Performance, accessibility, and SEO optimization.
    • Implementation of complex forms with client-side and server-side validation.
    • Integration and tracking of Google Analytics events for traffic and conversion analysis.
    • Implementation of secure authentication systems (JWT).
    • Integration of payment flows with Stripe.
    • Downloading and viewing PDFs directly in the browser.

    #

    Backend Development

    • Design and implementation of the backend architecture with Node.js and Express.
    • Management and configuration of PostgreSQL databases with Prisma ORM.
    • Development of secure APIs for users, tasks, payments, and documents.
    • Setup of automatic PDF document generation from dynamic data.
    • Deployment of the backend on VPS, domain management, and SSL configuration.
    • Complete application security: validation, authentication, HTTPS, protection against injections and common vulnerabilities.
    • Management of development/staging/production environments and deployment automation.
    Nextjs Express PostgreSQL TailwindCSS Stripe

Recommendations

Fahari H.FH
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Fahari H. and 1 other person have recommended Cedric

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Education

  • BAC +3, Application Designer Developer
    École Ri7
    2023
    BAC +3 , Concepteur Développeur d'applications
  • Professional Aptitude Certificate, Web Integration and Development Technician
    IFCASS Dieppe
    2021
    Certificat d'aptitude professionnelle, Technicien d'Intégration et de Développement Web

Skill set

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