Freelancer profile translated to English.
Back to original languageAbout Clément
Freelance full-stack developerwith over10 years of experience, I support startups, SMEs, and large groups in software publishing, digital and IT services, as well as digital companies. Expert inReact.js,Next.js,Typescript, andJavaScript, I cover all aspects of Front-End and Back-End development with in-depth mastery ofNodeJS,NestJs,ExpressJS,PostgreSQL, andPrisma. I work on web integration, responsive integration, and responsive design to ensure optimized performance, maintainability, andCore Web Vitals. My goal: to create robust, scalable, andSEO-oriented applications.
Graduated fromESSEC, I combine technical skills with business understanding to offer reliable solutions, adapted to your objectives and focused on user experience. I work on visual identity,UI, andUXwithFigma, and develop modern interfaces usingHTML5,CSS3,TailwindCSS,React, andVite.js. On the back-end, I designRESTandGraphQL APIs, secured by OAuth2, deployed onAmazon Web Services(AWS S3 included), containerized withDocker, and automated through continuous integrationCI/CDpipelines. All versioned withGitandGitHub.
Rigorous, I practiceTDDwithJest, end-to-end tests withPlaywright, and structure my projects in Monorepo according toSOLID,Clean Architecture, andDomain Driven Designprinciples. I useCursorand exploreClaude Code,OpenAI,LLMs, andRAGto enhance development with artificial intelligence. I also masterSSRSfor report generation.
Autonomous, passionate, and bilingual English/French, I quickly adapt to your stack. Let's discuss your project!
English
Fluent
French
Native or bilingual
Remote only
Primarily works remotely
Experience
- PlataneFullstack DeveloperPUBLIC SECTORSeptember 2025 - Today (9 months)Poitiers, FranceNext.js Fullstack Developer – International Project (AI & RAG – Custom MVPs)Mission within international projects with high technological intensity, aiming to transform complex, multi-country client needs into reliable, performant, and scalable MVPs. The approach is based on implementing the latest technologies inRetrieval-Augmented Generation(RAG) and web development, to quickly deliver robust solutions adapted to various business environments.Technical Stack:Next.js 15 (app router, server actions, RSC)PostgreSQL (relational schemas, optimizations for RAG)Claude AI, Cohere, specializedLLMs(embeddings, generation, advanced reasoning)Apache Tika (multi-format ingestion and parsing)TailwindCSS + Shadcn/ui (reactive and coherent design system)DockerChallenges & Achievements:Design and implementation of completeRAGpipelines (ingestion, chunking, embeddings, indexing, semantic search) for multi-language and multi-format documents, for clients across several continents.Creation of custom MVPs, capable of quickly moving from the exploratory phase to an industrializable version, while maintaining strong technical rigor.Continuous integration of new technological components (latest generation LLMs, parsing and indexing tools) to stay at the forefront of a constantly evolving sector.Management of client needs complexity: transforming often imprecise expectations into concrete, clear, and actionable features.Ensuring performance, accessibility, and security, even in demanding international usage contexts.
- AlpacapFrontend DeveloperE-COMMERCEMarch 2025 - September 2025 (6 months)Londres, United KingdomSenior Frontend Developer – Alpacap (SaaS Fintech – Monorepo)Mission within a fintech SaaS in a monorepo, structured around two distinct areas: a client dashboard rich in financial visualizations and a comprehensive administration area. Objective: to make complex data readable, interactive, and actionable, while ensuring performance, accessibility, and quality of experience.Technical Stack:React 19, Next.js 15 (app router, server actions, RSC)TanStack Query (fetching, caching, advanced sync)Zustand (local and global state management)Visx (complex and custom SVG graphs)Monorepo with TurborepoChallenges & Achievements:Creation of modular components for highly dynamic dashboards, driven by back-office configuration.Development of advanced financial visualizations (multi-series charts, temporal heatmaps, interactive overlays) usingVisx, with strong business logic.Implementation of an intelligent loading system, combiningTanStack QueryandZustandto display partial views as soon as possible.Server-side rendering (SSR/CSR) optimization to improve perceived performance and SEO.Creation of usable, accessible (a11y) interfaces consistent with the business constraints of the financial sector.Demanding project with a high level of technical and product complexity, where information readability and user experience were top priorities.
- ClimbSenior React/NextJS DeveloperPRIVATE EQUITYJuly 2019 - Today (6 years and 11 months)Paris, FranceFrontend Developer – Complete redesign of the Climb website (formerly Tacotax)Total redesign of the Climb website, a tax optimization fintech platform. End-to-end mission: technical migration, complete rebranding, and creation of a secure client area, with high demands on performance, UX/UI, and product rigor.Stack & Tools:Next.js (advanced routing, SSR, ISR, server components)React (hooks, context, composability)TailwindCSS + Custom Design SystemTypeScript, ESLint, Prettier, Jest, StorybookWork Performed:Progressive migration fromReacttoNext.js, ensuring compatibility, SEO, performance (static rendering, server-side rendering), and good DX.Design and complete integration of a new design system, in close collaboration with designers. Pixel-perfect work, adherence to atomic design principles, tokens, accessibility (a11y), dark mode, responsiveness.UI/UX Redesign of all public pages (landing pages, simulators, conversion funnel), with particular attention to information clarity and user conversion.Creation of a personal client area, fully secured and API-connected, for viewing and managing tax and financial data. Highly dynamic interfaces, with fine-grained state management, progressive loading, and user feedback.Challenges:Strong involvement in product decisions, in direct liaison with the design, marketing, and tech teams. Demanding project in terms of visual and functional excellence, with sensitive and complex data to present in a simple, educational, and engaging manner.
Reviews
Recommendations
QV
JJ
These freelancer profiles also match your criteria
Agatha Frydrych
Backend Java Software Engineer
4.7
(3)
2
Baptiste Duhen
Fullstack developer
4.6
(4)
5
Amed Hamou
Senior Lead Developer
4
(2)
7
Audrey Champion
Web developer
4.3
(3)
4
Education
- MasterESSEC Business School2014Master en Management (Bac+5)