Freelancer profile translated to English.
Back to original languageAbout Killian
I am Killian, a full-stack web developer specializing in the JavaScript / TypeScript ecosystem: Next.js and React on the front end, Node.js (Nest.js and Express) on the back end. I design and deliver complete applications, from architecture to production: APIs, databases, performance, and user experience included.
The real difference in a project lies not in knowing how to code, but in the ability to make the right technical choices at the right time and deliver something that lasts. That's what I bring you.
My skills:
Front-end (Next.js, React): server-side rendering, careful performance, reactive interfaces.
Back-end (Node.js, Nest.js, Express, Laravel): robust REST and GraphQL APIs designed to evolve.
Databases (MySQL, PostgreSQL, MongoDB): relational or NoSQL, chosen according to the actual need.
Quality: TypeScript typed code, tested and maintainable.
About AI, let's be clear: I master the most advanced AI-assisted development tools (Claude Code, Codex) and use them daily. But they are accelerators, not crutches. The value comes from the engineer who pilots them (architecture, code review, security, debugging), not from the tool alone. AI saves me time; it doesn't decide for me. It's my technical culture, from DevOps to algorithms, that allows me to get the most out of it rather than depending on it.
My way of working:
Understand. I grasp your needs and context before talking about technicalities.
Build. I transform the objective into a concrete product, with regular checkpoints.
Make it last. Once online, I remain available to fix and evolve the project.
Let's discuss your project.
French
Native or bilingual
English
Native or bilingual
Spanish
Fluent
Remote only
Primarily works remotely
Experience
- KalonysFullstack Developer React, React Native, Node.jsSOFTWARE PUBLISHINGMarch 2024 - Today (2 years and 5 months)Nice, FranceDuring this mission, I had the opportunity to work on a variety of projects as a full-stack developer. My main role was to design and develop both the backend and frontend parts of web and mobile applications. For the frontend, I used React, which allowed me to create interactive and responsive user interfaces. On the backend, I worked with Node.js to develop robust and performant APIs, as well as to manage server logic and databases, particularly with MongoDB.
- Riviera Beauty InteriorsAdvanced Management SystemLUXURY GOODSDecember 2022 - March 2023 (4 months)Villefranche-sur-Mer, FranceRiviera Beauty Interiors is a company specializing in high-end services for the yachting industry. I was responsible for the redesign of their web application, developing a backend API with Laravel and a frontend interface with Next.js, to optimize their data processing.Here are the main elements I implemented as part of this project:💻 Development of a robust and responsive frontend interface with Next.js, improving user experience and facilitating interaction with application features.🔌 Creation of a RESTful API with Laravel, which efficiently handles backend operations, including interaction with the SQL database.💪🏻 Implementation of unit tests with Jest to ensure the reliability and robustness of the application, contributing to error minimization and product stability.📊 Management of an SQL database, ensuring secure and efficient data storage, and enabling fast and accurate data retrieval operations.🚷 Implementation of a solid authentication system for employees, strengthening the security of the company's sensitive data.
- StulNext.js API IntegratorREAL ESTATEAugust 2023 - September 2023 (2 months)Nice, FranceDuring this two-month mission, I played a key role as a Next.js API integrator. My main role was to facilitate communication and interaction between a frontend application developed with Next.js and a backend built with Laravel.Main responsibilities:- Successfully integrated various APIs, ensuring smooth and secure communication between the frontend and backend.- Optimized API calls and managed data with React Query.Collaboration with the Backend Team:- Worked closely with a team of Laravel developers to understand backend requirements and ensure the integration met company specifications and needs.Testing and Debugging:- I performed various comprehensive tests to ensure the robustness and reliability of my API integrations.At the end of this mission, I not only strengthened my technical skills by refining them and learning new tools, but I also improved my ability to work with a team of developers of diverse backgrounds and nationalities.
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Education
- Grande École ProgramEpitechConception et développement de logiciels. Développement de sites web et d'applications mobiles. Gestion de projets informatiques. Compréhension approfondie des systèmes d'exploitation et des réseaux. Administration et gestion de bases de données. Connaissance des méthodologies agiles (Scrum, Lean, etc.). Compréhension des problématiques de sécurité informatique. Travail en équipe et capacités de communication. Compréhension des principes de l'architecture de l'information et de l'expérience utilisateur. Capacité à apprendre de manière autonome de nouvelles technologies et langages de programmation.