Freelancer profile translated to English.

Description

Experienced TypeScript developer with 18 years of expertise, specializing in Svelte and React frameworks. I design high-performance web applications where accessibility and user experience are at the core of every technical decision. My approach combines innovation and best practices to deliver robust and scalable solutions.

Available for short or long-term assignments, I adapt to your needs to contribute effectively to your projects.

Industry field of expertise

Languages

Finnish
Native or bilingual
English
Fluent

Workplace preferences

Can work on-site

Paris 17e Arrondissement (up to 50km)

Radio France
Full-Stack Svelte/SvelteKit Developer
PRESS AND MEDIA
January 2022 - Today (4 years and 5 months)
Paris, France
Development and modernization of France Bleu Web (francebleu.fr).
Team of 12 people (7 developers, 2 UI/UX, 2 PO, 1 accessibility expert).
1 CoP/sprint day: collaborative technology watch sessions. Migration from PHP Symfony/React to Svelte 3/4 and SvelteKit. Continuous optimization of performance (WebPerf) and accessibility for a senior audience on older devices.
France Bleu + France 3 regions merger → here: New DA and content management.
Traffic growth of +21% in 3 years (33M → 40M page views/month) thanks to the new stack, SEO improvements, WebPerf, and editorial strategy.
Front-end development and Storybook from Figma mockups
Svelte/SvelteKit fully typed with TypeScript
Back-for-Front with GraphQL and Fastify
Performance and accessibility optimization
SEO optimization (JSON-LD, internal linking, resources, Web Core Vitals)
Production monitoring (ELK and Grafana)
Technical on-call duty during critical traffic peaks (up to 33k page views/minute)
Accessibility improvement - RGAA 65%
Market research services with OpenStreetMap and Leaflet
Government APIs for elections and services
Design system development in Atomic Design
Player development (customization for France Bleu)
Eco-design: Participation in the Sustainable Challenge 2024
Svelte Typescript Functional Programming Kibana scss Vitest Testing Library Playwright pnpm Elastic Stack (ELK) Storybook
Zeloce
Lead Front-End Developer
TRANSPORTATION
April 2020 - November 2021 (1 year and 8 months)
Joinville-le-Pont, France
Lead Developer in a startup specializing in last-mile logistics management.
Conception from scratch of a last-mile logistics management application for delivery services of various companies such as Leroy Merlin or Spie Batignolles. Team with 1 backend (Elixir), 1 full stack, 3 front-end, 1 UI/UX, and 1 PO.
- Product design
- Stack choice and Front-End architecture implementation
- Front-end technical lead
- Implementation of maintainability best practices: Atomic Design, TypeScript, testing (Jest/Testing Library, Cypress, Chromatic), and documentation.
- Recruitment and onboarding of developers
React.js Typescript Agile methodology Atomic Design Storybook Leaflet Lerna Emotion
PMU PARTENAIRE
Front-End Developer
ENTERTAINMENT AND LEISURE
December 2019 - March 2020 (4 months)
Paris, France
Feature team (6 Front-end, 4 back-end)
- Maintenance and evolution of horse racing applications
- Migration from JavaScript/Backbone to TypeScript/React
React.js Typescript Jest testing library Agile methodology