Yoan Gwizdala

Full stack development of Michelin's "tyre selector", an interactive map-based tire search tool powered by Google Maps. Stack used: Astro, Svelte, Apostrophe CMS. Implementation of several search methods: by license plate, dimensions, or vehicle model, with dynamic display of results. Development of the dealer map with filters, geolocation, and smooth navigation.

Participation in migrating the frontend architecture from a SPA to a MPA to improve performance, SEO, and initial loading time. Unit tests performed to ensure code quality and stability. Advanced performance optimization (lazy loading, SSR, accessibility, Lighthouse best practices). Agile methodology work with product, design, QA, and backend teams.

At Amiltone, I am currently working as a Lead React.js Developer and experienced TypeScript developer on web projects in a professional context (team, deadlines, quality). I manage the front-end part: technical framing, architecture choices, code organization, quality improvement, and developer support (code reviews, best practices, daily support).

I have worked on modern interfaces in React.js (components, hooks, state management, routing, forms, API consumption, UX/UI and responsive optimization). In parallel, I have also carried out developments with Svelte / SvelteKit: creation of reusable pages and components, stores, routing, forms, API integrations, and bug fixes.

On the quality side, I apply and enforce standards: clean code, strict TypeScript typing, modular design, error handling, logs, project-based testing, documentation, and automation (npm scripts). I also intervene on performance (JS reduction, lazy-loading, rendering optimization), build stability, and continuous improvement (maintainability, readability, technical debt).

Curious and open to new technologies, I adapt quickly to environments and enjoy testing/implementing new solutions when they bring real value.

I collaborate with PO/UX/QA using agile methodology (estimations, iterations, demos), and ensure clear communication on risks, trade-offs, and deliverables.

Today, I support clients on React / Vue / Svelte / TypeScript missions: feature development, partial redesign, refactoring, quick debugging, API/webhook integrations, and continuous improvement (performance, quality). Available in the evening / night if necessary for emergencies or production deployments.

Freelance full stack web developer, I work on all types of projects, from the simplest to the most complex. I work on CMS like WordPress (with or without theme), Apostrophe, or other custom systems, integrating specific functionalities via custom requests, scripts, or APIs. I work on both the front-end (React.js, Svelte, Angular, Astro...) and back-end (Node.js, PHP, database management, business logic) parts. I adapt to the client's needs, whether it's a quick fix, a feature addition, or a complete development.