Freelancer profile translated to English.

Description

I design and developmobile applications from scratch(React Native + backend), and since the advent of generative AI code, I deliverfaster and with better qualityby leveraging **vibe coding**: AI code assistants, rapid prototyping, and short feedback loops with my clients.

My DNA**: engineer (ENSMM) and **12 years of freelancing(~30 projects). I don't just write code: I think about product, user experience, and maintainability.

What I do

**Product Design**: mockups, workflows, database modeling.
**Full-cycle mobile development**: React Native/Flutter (iOS + Android), backend (Supabase/Firebase/REST), deployment, and maintenance.
**Vibe coding / DevX**: I integrate AI assistants into my development workflow to accelerate prototyping, test coverage, and refactoring — without sacrificing robustness.

Why it changes everything for you

**Reduced time-to-market**: An MVP that used to take weeks can be prototyped in days.

**Rapid iterations**: Weekly deliveries, continuous adjustments.

**Controlled quality**: AI accelerates, but 12 years of engineering ensure that the delivered code is robust and maintainable.

Bonus: I also masterAI automation(agents, n8n) — useful for integrating AI features directly into your products.

Industry field of expertise

Languages

English
Fluent
French
Native or bilingual

Workplace preferences

Can work on-site

Lyon (up to 50km)

UnBonSpot
Creation of an application and backend for a booking platform
TRAVEL AND TOURISM
January 2024 - December 2025 (1 year and 11 months)
Lyon, France
unBonSpot is a booking application for "SPOTS" at farms for local tourism enthusiasts.
The mission involves creating a social mobile application allowing travelers to view and book available spots at farms. Travelers are nomadic tourists traveling in vans or motorhomes.
Mobile Application JavaScript Supabase React Native Mapbox
FIFTEEN
FIFTEEN - Augmented bike networks
TRANSPORTATION
March 2022 - March 2025 (3 years)
Lyon, France
Development of a maintenance mobile application for field operators, enabling complete management of the bike fleet: intervention tracking, breakdown reporting, repair planning, and real-time updates on equipment status.
The tool also facilitates team coordination and operational optimization.
React Native Mapbox JavaScript REST Mobile Application
Potager City
On Malt
Front-End Mobile Developer
RETAIL (LARGE RETAILERS)
February 2020 - Today (6 years and 5 months)
Lyon, France
The development and optimization of PotagerCity's client mobile application was a comprehensive project aimed at improving user experience, strengthening technical performance, and adapting functionalities to the evolving service. The main objective was to provide a smoother, more intuitive application that stayed true to the brand's identity, while ensuring long-term maintainability and scalability.
JavaScript React Native Mobile Development REST Mobile Application

Check out Sylvain's experience

Yproximite

YProximité

Reviewed on 9/27/2019

Good support, proactive on encountered issues

Account deleted

Reviewed on 2/15/2019

Throughout the mission, Sylvain was available, adapted to our change requests, and was proactive. We are satisfied with our collaboration and ready to work together again if we have a similar need.

Show all 21 reviews