Freelancer profile translated to English.

Description

Freelance web & mobile developer, senior, 8 years of experience, 22 missions delivered on Malt with an average rating of **4.95/5**.

I useClaude Codeand I build AI features & agents with the Claude, OpenAI, Make, n8n APIs daily.

Specialized inReact NativeandExpofor iOS & Android, but I also work on native iOS/Swift & Android/Kotlin thanks to Claude Code.

I also have a lot of experience in web development onReact.js(Vite or Next.js).

Feel free to contact me to discuss your project!

Industry field of expertise

Languages

French
Native or bilingual
English
Native or bilingual

Workplace preferences

Can work on-site

Paris (up to 20km), Lyon (up to 10km), Bordeaux (up to 10km), Nantes (up to 10km)

TextMaster
React Front-end Developer
PRESS AND MEDIA
March 2024 - September 2025 (1 year and 6 months)
Paris, France
Development of several web applications for translators (CAT tools), including Catify.
Front-end and back-end features (REST & GraphQL APIs).
Performance optimizations, rendering time reduction.
Migration to modern React + TypeScript + Hooks.
New CAT tool: React + Hono + Shadcn + local cache base (Zero).
AI translation SaaS: auth, Stripe, glossaries, tone & style.
Used by thousands of translators.
TypeScript Developer React.js
Malt
Full-stack Developer React, React Native, Ruby on Rails
SOFTWARE PUBLISHING
August 2018 - September 2025 (7 years and 1 month)
Paris, France
Senior full-stack profile (10+ years): strong expertise in React Native/Expo, as well as solid experience with Ruby on Rails and React.js/Next.js with end-to-end production web and mobile applications.
Experience with payments (Stripe), booking systems, POS, and business logic algorithms.
Field credibility: missions for recognized players (Dailymotion, TextMaster, Foncia, Monoprix…), long freelance experience with demonstrated autonomy and reliability.
Technical depth: architecture (monolith → microservices migration), testing (RSpec, Capybara), background jobs (Sidekiq), real-time APIs.
International & versatile profile: experiences in France and remote, trilingual (FR/EN/ES), comfortable in distributed teams.
React Native React.js Ruby on Rails Supabase

Jean-François

Agily

Reviewed on 7/13/2022

Karim is professional, efficient, and technically sound. He quickly understood the context and challenges of the mission and provided real solutions through fluid and constructive exchanges.