Lionel Sirvel
Frontend Engineer × Product Designer

I design and build user-centred digital products.

From UX research and UI systems to production-ready React and Next.js — I take products from first sketch to shipped, accessible code.

Selected work

4 projects

Capabilities

Engineering

Frontend & full-stack

HTML, CSS, JavaScript & TypeScript
React & Next.js applications
Tailwind CSS & design-system implementation
PostgreSQL, Auth.js & multi-tenant data
Accessible, responsive, production-ready UI
Design

UX & product design

UX research, interviews & user testing
User flows, wireframes & prototyping
UI design systems & component libraries
Figma — from mood board to clickable prototype
Accessibility-first interaction design

About

I'm Lionel — a frontend engineer with 6+ years of experience building for the web with HTML, CSS, JavaScript, TypeScript, React and Next.js.

What sets my work apart is end-to-end product creation: I combine design and development, so I can take an idea from research and wireframes through a design system and into shipped, production code.

I care about products that are useful, accessible, secure and thoughtfully crafted — and about the details that make them feel that way.

How I work

01

Understand

Research the users, the problem and the constraints before anything is drawn.

02

Design

Flows, wireframes and UI systems — tested and iterated, not decorated.

03

Build

Accessible, responsive, production-ready code with React and Next.js.

04

Validate

User feedback and refinement until the product earns its place.

Let's build something meaningful.

Open to work opportunities, collaborations, or conversations around UX, frontend development and digital products.