Guillaume Dumas, Frontend Developer

Description

Frontend developer from Grenoble, trained at 42 School Lyon after a first career in high-end leather craft.

I like turning complex product flows into clear, readable interfaces that feel easy to pick up.

I care about details and the small defects users feel before they can describe them.

Industry field of expertise

Languages

English
Native or bilingual
French
Fluent

Workplace preferences

Remote only

Primarily works remotely

Jupiter
Frontend Consultant
DIGITAL AND IT
December 2025 - February 2026 (2 months)
Frontend work on Jupiter Predict, a live market product inside a large Next.js and TypeScript codebase.
Reworked activity, For You, live option and leaderboard screens. Improved chart behavior, payment UI and desktop/mobile states.
Typescript Next.js Mobile development
Adrena
Frontend Intern
DIGITAL AND IT
July 2025 - December 2025 (5 months)
Joined a trading product team and shipped roughly 30 merged PRs across UI, swaps and optimized API work.
Reworked trading UI, token selector, staking leaderboard and ALP screens. Integrated Jupiter swaps, campaign UI and mobile layout fixes.
Typescript Next.js Mobile development API
Versus
Founder & Developer
DIGITAL AND IT
July 2024 - July 2025 (1 year)
Built a real-time betting product around live AI fighting matches. Public testing: 100+ testers, around 100 SOL in total volume.
Owned the Twitch scraper, oracle and monorepo work. Handled timing bugs, invalid matches, refunds and payout logic.
Typescript React.js Rust

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Common Core
42 Lyon
2025
Common Core
CAP Leatherworker
GRETA Lyon
2018
CAP Leatherworker

Check out Guillaume's education