Freelancer profile translated to English.
Back to original languageAbout Jeremy
Front-End Developer | React.js | Next.js | Typescript
Looking for a developer who can transform your ideas intoperformantandscalable**React applications**?
I will assist you in developing your interfaces, ensuringspeed**, **stability**, and **seamless integrationwith your existing systems.
I am a freelance **front-end developer**, specializing in **React.js**, **Next.js**, and **Typescript**.
My role is to design and develop modern React applications, relying on a solid foundation in TypeScript and efficient integrations with your APIs.
I work on new React or Next projects as well as existing products that require **refactoring**, **optimization**, or the addition of **new features**.
I have participated in various projects: SaaS platforms, e-commerce solutions, client portals, internal tools, and complex software.
In each assignment, I have worked to deliver a clear and intuitive interface for the user, while ensuring arobust and sustainable architectureon the technical side.
My approach is **turnkey**: readable, tested, and documented code, careful integration with backend services via GraphQL or REST API, and deliverables ready for production.
I make it a point of honor to ensure themaintainabilityandscalabilityof the delivered product so that the team can grow it with confidence.
Technical Stack: React.js, Next.js, Typescript, JavaScript, GraphQL.
I offer an initial video call to understand your needs and define the best approach for your project together.
I respond quickly, usually within the hour.
French
Native or bilingual
English
Fluent
Can work on-site
Paris (up to 50km), Lyon (up to 50km), Lille (up to 50km), Bordeaux (up to 50km), Clermont-Ferrand (up to 50km)
Experience
- CarrierLead Front-end Developer | React.js | TypeScriptMECHANICAL ENGINEERINGJanuary 2024 - Today (2 years and 6 months)Lyon, France→ Mission Objective:Audit, design, and initiate an application software for Carrier Europe's HVAC teams, whileleading front-end qualityand supporting developers.→ Achievements:- Comprehensive audit of theTypeScriptandReact.jsarchitecture, creation of a unified design system, improving consistency, perceived quality, and productivity.- Development of reusable andpixel-perfectcomponents with Material UI Pro and MUi X, ensuring performance and time savings on the front-end.- Technical supervision and skill development through Git best practices, Jira workflows, and code reviews, strengthening team stability and **performance**.→ Technical Stack:TypeScript, React.js, Vite, GraphQL, TanStack, React Hook Form, Material UI Pro, MUi X
- CarrierFront-end Developer | React.js | TypeScriptMECHANICAL ENGINEERINGSeptember 2023 - January 2024 (4 months)Lyon, France→ Mission Objective:Design and develop real-time risk/incident logging and tracking software for Carrier laboratories and production sites.→ Achievements:- Development of ergonomic interfaces in **React.js**, **Formik**, and **Material UI**, with reusable components via **StoryBook**, improving perceived quality and productivity.- Implementation of aGraphQLAPI withApolloand data management via **TanStack query**, ensuring performance and reliability of real-time reporting.- Enhanced stability with automated tests (Vitest**, **Playwright) andserverlessdeployments, reducing time-to-market.→ Technical Stack:TypeScript, React.js, GraphQL, Apollo, TanStack query, Formik, Material UI, StoryBook, Vitest, Playwright, Serverless
- MobiviaReact.js Developer | Node.js | TypeScriptAUTOMOBILEFebruary 2022 - April 2023 (1 year and 3 months)Lille, France→ Mission Objective:Migrate the Vehicle Customer Repository (Norauto, Midas, Auto5) from Cassandra to PostgreSQL and refactor REST APIs to support **very high load**.→ Achievements:- Rewriting of 12 REST APIs in Node.js (Koa) with Prisma, optimizing SQL queries andimprovingapplication **performance**.- Migration from Cassandra to PostgreSQL, strengthening the **reliability**, **scalability**, and perceived quality of critical services.- Implementation of aCI/CDpipeline withGitLab CI**, **Docker**, and **Kubernetes**, automating tests ( **TDD/BDD) and accelerating deployments in a Scrum / Kanban environment (Jira).→ Technical Stack:TypeScript, Node.js, Koa, Prisma, PostgreSQL, Cassandra, GitLab CI, Docker, Kubernetes, Scrum, Kanban, Jira
Reviews
Ruslan
CyberDune
Reviewed on 7/20/2025
I contacted Jérémy to audit the React front-end of a project I supervise on the back-end side. Not being an expert in this stack, I wanted a senior perspective to validate the technical choices already made by a junior developer, and to ensure that the project's foundation was sound and scalable.
From our first conversation, Jérémy understood the challenges and objectives. He quickly identified the strengths and areas for improvement, with great clarity and pedagogical skill. His audit was structured, precise, and directly actionable. He also proposed concrete solutions for establishing a solid and scalable technical foundation.
Professional, efficient, and highly knowledgeable in the React stack, I highly recommend him if you are looking for an expert to secure or challenge an existing foundation.
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