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5G

Experience

Today
Soon, a new professional adventure…
1.5 yr
02/2025 — 08/2026
Lead Mobile Dev
Hustle Up (Fitness app) — Full remote — Chambéry (73)
Company: 20 — Team: 5 — Mobile users: 10k+
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Workflow optimization + velocity improvements + process automation
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Legacy cleanup, best practices definition, Design System setup
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React Native + Expo + EAS (build + update) + advanced tracking (Firebase, AppsFlyer)
+2 yrs
07/2022 — 09/2024
Lead Mobile Dev
Dougs (Online accounting) — Full remote — Lyon (69)
Company: 250 — Team: 6 — Mobile users: 10k+
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Process & test automation + workflow optimization
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Legacy cleanup (full feature rewrites), Design System creation
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React Native + Expo + EAS + advanced debugging & testing
1.5 yr
02/2021 — 06/2022
Senior Mobile Dev
Nickel / BNP (Neo-bank) — Partial remote — Nantes (44)
Company: 500 — Team: 12 — Mobile users: 1 million
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Helped improve workflow and team velocity
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Legacy cleanup (JS → TS + Redux → react-query), Design System creation
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React Native + Redux + security management
+2 yrs
07/2018 — 11/2020
Entrepreneurship
Keeptie — Koyasik — Asymov — Full remote — Paris (75)
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Keeptie: CRM/ERP (React, TS, Symfony, API Platform, PostgreSQL, Docker…)
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Asymov: B2B website creation (React, TS, Lektor, Hexo, Webpack…)
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Koyasik: Game studio (Godot, GDScript/Python, Node, TS…)
1 yr
10/2017 — 10/2018
Fullstack Web Dev
XCG Consulting (IT services) — Partial remote — Paris (75)
Company: 25 — Team: 5
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E-commerce website leclaireur.com (luxury clothing & accessories)
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Website cnpp.com (risk prevention & control training)
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Internal tool for vinci.com (employee leave/absence management)
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Python (Django & Wagtail) + TS/Elm + Node + PostgreSQL/SQLite
2 yrs
09/2015 — 08/2017
Fullstack Web Dev
Heek (Chatbot creator) — On site — Paris (75)
Company: 10 — Team: 4
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Website-building chatbot with AI & NLP for B2B & B2C clients
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Front/Back from scratch, UX/UI design input, feature proposals
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Angular 2-4-universal + SailsJS + Hapi/Express + MongoDB + AWS
7 yrs
09/2008 — 08/2015
Frontend Web Dev — Retail associate — Military
SNCF — Carrefour — National Gendarmerie — Paris (75) — Noisy-le-Grand (93) — Vitry-le-François (51)
5G

Guillaume DUVAL

Senior / Lead Mobile Developer