Freelancer profile translated to English.
Back to original languageAbout Killian
My name is Killian. **Front-End Developer**, with 3 years of experience in building high-performing and structured web products, I help startups and freelancers create fast, well-designed, and effective landing pages in a few days, using a modern stack (Next.js).
I started 4 years ago as a self-taught developer, before undertaking an intensive 2-year training program at M2i Formation, validated by a Bac+2 in Front-End Development. There, I consolidated my foundational knowledge by working on concrete projects.
Since then, I have been documenting my journey and projects on LinkedIn and Twitter, where I also share my freelance assignments. I collaborated with Tetra Lab as a **no-code integrator**, converting Figma mockups into Framer interfaces for SaaS landing pages, and I also led redesigns of existing PHP websites.
I launched Gitify, an open-source challenge platform for developers. Result: a community of 100+ active users motivated to code every week. My goal is to make coding accessible and community-driven.
I am currently working at OpenSource Together, where I integrate Figma designs withshadcncomponents, optimize performance withNext.js**, implement **APIsvia TanStack Query, and work directly with the back-end to ensure a reliable and scalable data structure.
My preferred stack: **Next.js**, **TailwindCSS**, **Figma**, **REST APIs**, modular **UI components**. I place great importance on code clarity, project scalability, and loading speed.
💻I work primarily remotely, but if the geographical location suits me, it is entirely possible to arrange on-site work.
📩 For any inquiries, please send me a message specifying your identity and your project. This helps me to better organize our exchanges. I usually respond within an hour, and will then suggest a call if needed.
French
Native or bilingual
English
Fluent
Can work on-site
Lyon (up to 50km)
Experience
- MoovAI - UGC videos on autopilotLead Front-End DeveloperSOCIAL NETWORKSDecember 2025 - January 2026 (1 month)Lyon, FranceMoovAI: Generative AI-Powered UGC Content CreationMoovAI is an innovative application designed to automate UGC content creation in seconds, enabling brands and creators to transform ideas into professional videos using artificial intelligence, at a lower cost.Developed with Lovable, I orchestrated the platform's technical architecture, focusing on the interoperability of the market's most powerful AI models:SOTA (State of the Art) Integration: Implementation of the latest generation video generation APIs, including Kling and Sora, to ensure ultra-realistic visual rendering.Avatar Generation: Use of the Nano Banana Pro model for creating high-fidelity custom avatars, thereby optimizing audience engagement.Frontend Performance: Following my previous experiences, I maintained a modular development logic, ensuring smooth communication between user prompts and the complex outputs of generative models.Beyond integration, my role involved stabilizing the data pipeline to manage the inherent latency of heavy AI models, ensuring a fluid user experience despite the complexity of background computations. I ensured that the codebase was ready for rapid scaling, anticipating refactoring needs related to the constantly evolving LLM and video models.The results demonstrate the relevance of the product and its technical execution:Commercial Performance: Generated €12,000 in revenue during the initial operational phases.Efficiency: Drastically reduced content production time for clients, from several hours to a few seconds.
- OpenSource TogetherFrontEnd Developer NextJSSOFTWARE PUBLISHINGMarch 2025 - Today (1 year and 3 months)OpenSource Together is a platform in development that connects developers—from beginners to experienced—around open-source projects.The objective: to facilitate contribution, collaboration, and skill development within structured project teams.I collaborate with the design team to integrate "ready for dev" Figma mockups, which I implement in the frontend with a top-down approach.I send mocks to the backend to guide its construction according to the design, integrate APIs with TanStack Query while avoiding excessive use of useState, and rely on ShadCN UI to create modular and reusable components.I also refactor errors and the codebase to ensure better scalability.Results: a waitlist of +350 people and a Twitter account with +400 followers in just a few weeks after the initial announcement.
- GitifyFull Stack Developer | NextJSSOFTWARE PUBLISHINGApril 2025 - May 2025 (1 month)Lyon, FranceGitifyis an open-source community application designed as a micro-SaaS, aiming to transform developer activity into an engaging experience. The platform relies on gamification mechanics (streaks, badges, challenges) to value regularity and technical progress.I led the entire product lifecycle, from strategic design to end-to-end technical implementation (A to Z):**Next.js & API Architecture**: Design of a high-performance interface with deep integration of the GitHub API for real-time activity tracking.**Authentication System**: Implementation of a secure flow via NextAuth, optimizing user onboarding through GitHub OAuth.**Data Management**: Structuring a robust database with Prisma and Supabase, enabling smooth management of public profiles, personalized dashboards, and complex streak calculations.Design & UX: Complete creation of the design system, from mockups to the landing page, to offer an intuitive and modern user experience.Beyond development, I manage the technical direction of the project by fostering community involvement:Active Maintenance: Handling user feedback to quickly iterate on the most requested features.Open to Contributions: Structuring the repository to facilitate the onboarding of new contributors, transforming a solo project into a collaborative initiative.In just a few weeks, Gitify has successfully gathered an active user base:**Adoption**: Over 100 organically registered users.**Engagement**: Over 200 commits directly driven by the application's mechanics.**Reach**: Creation of strong momentum on Twitter and LinkedIn, positioning the project as a local benchmark for developer motivation.
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Education
- Développeur Web - Web Mobile Bac+2M2i Formation2025- Maîtrise des fondamentaux du développement : HTML5, CSS3, JavaScript, PHP, SQL
Certifications
- CS50X Introduction to Computer ScienceHarvard EDX2025