Freelancer profile translated to English.

Description

Mobile developer for your iOS & Android app

For 5 years, I've been helping companies and startups launch, scale, and stabilize their mobile applications, from the first version to several million users.

A crashing app, a slow app, or a provider who disappeared with the code: these situations cost clients and damage reputation.

App Creation:

Development of your iOS & Android app from your mockups or your idea
MVP in a few weeks to validate your market or convince investors
A single codebase for both platforms
Full publication on the App Store and Google Play

Team Augmentation, Technical Lead & Project Management:

Quick integration into your team and tools
Technical lead on your mobile product: architecture, roadmap, managing a team of developers
Agile Scrum project management: backlog, sprints, rituals, coordination with product and design
Code review, pair programming

Advanced Features & AI

Payment, notifications, offline mode, animations
Chatbot, voice transcription, AI-connected assistant
Targeted, delivered, and documented intervention

Audit & Project Rescue

Abandoned app or AI-generated app that no one maintains
Clear diagnosis: bugs, slowness, technical debt
Prioritized action plan and restoration

Results achieved:

+9 million downloads, 70,000+ active users

An app to launch?

Need to strengthen your team?

A project in difficulty?

Let's talk.

Technical Stack

React Native · Expo · TypeScript · Zustand · React Query · Reanimated · Supabase · Firebase · Node.js · GraphQL · Stripe · Sentry · EAS Build · Fastlane · Maestro · CI/CD

Industry field of expertise

Languages

French
Native or bilingual
English
Fluent

Workplace preferences

Can work on-site

Paris (up to 50km), Nice (up to 50km), Lille (up to 50km), Marseille (up to 50km), Lyon (up to 50km)

Télémaque
Lead React Native
HEALTH AND WELLNESS
April 2022 - April 2026 (4 years)
Nice, France
4 iOS & Android apps designed, developed, and published in production:
iHoroscope, iVoyance, MyCosmo by Cosmospace, Astral Theme.

Impact & Traction

+9,000,000 downloadscumulatively on the stores.
70,000+ registered userson mobile apps (since 2023).

Responsibilities
Technical lead on the entire cycle: design, development, App Store & Google Play publication.
Complete migrations: React Native CLI → Expo (EAS Build).
Offline-first architecture: MMKV + TanStack Query.
Technical integration: Real-time chat (WebSocket), VoIP (CallKeep, SIP.js), Apple/Google auth.
Services & Data: Push notifications (Batch, Firestore), i18n (react-intl), analytics, A/B testing.
Advanced UI/UX & Animations: Reanimated, Lottie, Moti.
Internal Engineering: Creation and maintenance of an internal UI library.
Project management: Agile Scrum organization (backlog, sprints, rituals).
Management: Supervision of a team of 2 to 3 developers, pair programming, code review.
Collaboration: Close coordination with product, design, support, and management.

Web
Development of associated websites (Next.js, SEO): Horoscope.fr, Cosmospace.fr, Esmeralda.chat, Easy-psychics.com.
Expo React Native Mobile Application Mobile Development Next.js
HearType
AI SaaS for transcription and summarization of voice notes (WhatsApp / Telegram).
SOFTWARE PUBLISHING
April 2026 - June 2026 (2 months)
Nice, France
Impact & Engineering

Solo Design & Launch:
Complete product creation from technical architecture to market launch.

Mobile-Ready API Architecture:
Development of a high-performance backend using Node.js (deployed on Railway) designed to be interfaceable with connected mobile applications.

Responsibilities

Advanced AI Integration:
Orchestration and connection of language model APIs (LLM) for real-time transcription and data processing.

Scalable Infrastructure:
Management of webhooks, authentication, and data persistence to ensure high service availability in production.
Artificial Intelligence Node.js REST API Telegram Bot AI Chatbot
Le vieux chalet
Full development of a custom SaaS solution
RESTAURANTS AND FOOD SERVICE
April 2026 - May 2026 (1 month)
Bulle, Switzerland
Full development of a custom SaaS solution (Administration Dashboard and business automations).

Engineering & Architecture

Mobile-First & Field Approach:
In-depth optimization of the user interface to ensure total fluidity and responsiveness during intensive use on tablets and smartphones in the field.

Cloud Infrastructure:
Configuration of a responsive backend using Node.js coupled with Firebase for real-time data persistence and synchronization.

Responsibilities

Admin Interface (Next.js):
Creation of a centralized control web application for monitoring metrics and data.

Automations:
Design of automated workflows to simplify and accelerate the operational processes of the establishment.
Next.js Firebase Node.js Front-End Development Mobile Performance