Crafting intuitive, user-centered interfaces that transform complex problems into seamless digital experiences

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Célestin Rumo

Frontend Developer

Passionate about creating user-friendly interfaces

Modern stack, shipped with intent

Component-driven UIs, measurable performance, and clear handoffs so design, product, and engineering stay in sync.

Web Design

IA & flowsPrototypageDesign systemFigma

Co-create the narrative, information architecture, and flows so every screen has a job to do.
Wireframe → high-fidelity UI → interactive prototype to validate with real users before dev starts.
Design systems thinking: reusable patterns, accessible states, consistent motion and spacing.

Development

Vue / NuxtReact / NextTypeScriptPerf & CWV

Ship fast and safe with Vue/Nuxt, React/Next, TypeScript, Tailwind, GSAP when it adds delight.
Performance first: lean bundles, measured Core Web Vitals, progressive enhancement, graceful fallbacks.
Clean architecture: components you can hand off, tests where it matters, docs so the team can iterate.

Audit

UX teardownA11yCore Web VitalsQuick wins

UX teardown with heuristics + user journeys to spot friction, dead-ends, and conversion leaks.
Accessibility and performance checks with actionable, prioritized fixes (effort vs. impact).
Deliverable you can act on: before/after mockups, backlog-ready tickets, and quick wins list.

Portfolio Examples

In-depth analysis of select projects

Ski guide website

Elite Snow Experience

ReactNext.jsi18n (fr/en/es)SSRSEOCI/CD

React + Next.js, server-side rendering, localized routing, and a guided CTA funnel for ski services.
Ski guiding & private lessons site with luxe storytelling, multilingual booking funnel, and clear service packs for high-end guests.

Visit Website

Elite Snow Experience hero and booking preview

Visit Website

DevOps / Infrastructure project

Multi-site Deployment Architecture

DockerTraefikJelasticCI/CDGitHub ActionsGHCRReverse ProxyMulti-domain Hosting

Built a production deployment setup for multiple websites using Docker, Traefik reverse proxy, Jelastic hosting, GitHub Actions CI/CD, and GitHub Container Registry, with domain routing to the correct containers and automated image updates.
Containerized deployment architecture for multiple websites with domain-based routing, automated image delivery, and production-ready CI/CD workflows.

Infrastructure diagram for Docker, Traefik, Jelastic and CI/CD deployment

Technologies stack

Specializes in modern front-end development, with deep expertise in building dynamic and responsive user interfaces. Proficient in utilizing a range of cutting-edge tools and frameworks to deliver high-quality, scalable, and maintainable software solutions.

Equipped with a strong understanding of the latest technologies to craft seamless and efficient applications tailored to meet complex project requirements

Testimonials

What clients and peers say

“As CTO of Asyril, I had the opportunity to work closely with Célestin. He is a skilled frontend developer, particularly attentive to user needs and the quality of the user experience (UX). Engaged and dynamic, he also demonstrates excellent collaboration skills.”

“I had the opportunity to work with Célestin on several projects during engineering school. He is a reliable and responsible person with a great team spirit. His work and code are always clean, well-structured, and thoughtful. Working with him was both efficient and enjoyable, and I highly recommend him for any collaborative project.”

Hire a Frontend Who Ships

From spec to ship: accessible UI, performance, and predictable delivery.

Talk to me about a role