Yoann AndrieuxReact Native, React & Next.js Developer
I am a versatile product developer with strong React Native foundations and end-to-end React and Next.js experience. My management background shapes an empathetic approach to users, UI/UX and teamwork. I turn product needs into clear journeys, maintainable architecture and verified delivery across mobile and web.
React
Architecture
UX
Product
Quality
Delivery
Featured case studies
Three products, three fundamental problems
Code matters, but constraints, rejected options and evidence of operation say more about the quality of the work.
01Sensitive product · Offline-first · Permissions
Moodday
Make personal tracking reliable without presenting it as a clinical tool.
122/122
active tests
02Product strategy · Workflow · Reliability
Jobio
Turn an oversized SaaS into a clear next commercial action.
399/399
active tests
03Security boundary · Testnet · Risk-first
MyCryptoPilot
Demonstrate financial architecture without asking users to custody or copy funds.
482/482
active tests
Experiences
A selection of my web and mobile experiences
Full-time
(2)
KLESIA
Insurance
White-label retirement & benefits management mobile app
Jaji
Fintech
Mobile app for health insurance and financial services
Freelance
(7)
Portfolio Caroline
Portfolio
Portfolio for an artist with gallery and CMS
Portfolio Loïc Ghanem
Portfolio
Immersive portfolio for a film/video game/commercial music composer with 3D, mapping, audio player and back-office
Weil & Associés
Corporate
Corporate website for a law firm with a content management back office
Agence Néon
Agency
Website and maintenance for a Paris-based digital agency
Mail Certificate
SaaS
Certified mail sending platform with Stripe payments and 2FA
Nos Instants Précieux
E-commerce
E-commerce website with built-in SEO and marketing strategy
Test and Ride
Mobility
Mobile app for a vehicle testing platform with API integrations
Personal
(7)MoodDay
PWA
Non-clinical personal companion for tracking mood, energy and prescribed treatments
Jobio
SaaS
Focused sales workflow that tells freelancers what to do today to win their next engagement
MyCryptoPilot
PWA
Risk-first crypto demonstrator using demo/testnet data and read-only exchange connections
EggscuseMe
PWA
Web app to track egg freshness and reduce food waste
Hyrun
SaaS
Hybrid training prototype for runners, adapted to the equipment they actually have
HomeGo
SaaS
Next-gen real estate platform with DVF data and AI analysis
Crazee Burger
Food Tech
Online ordering MVP with menu and cart management
Cinema
(4)
CUPRA x AVNIER Ad
Advertising
General stage management on a CUPRA x AVNIER ad shoot, filmed at night in Noisy-le-Grand
Avatar — La Seine Musicale
Cinema
European premiere of Avatar 3 with James Cameron — projection booth and IMAX sound system installation
Optic 2000 Ad
Advertising
First assistant camera on a national ad shoot under DOP Julien Froment
Oppenheimer — 70mm Grand Rex
Cinema
First public 70mm screening at the Grand Rex since 1989 — 6.2 km of film, 140 kg of reels
Management Ops
(1)
Cyclofix (Roulez Jeunesse)
Management Ops
Led operational growth of a leading home bike repair scale-up for 6 years
Skills
My tech stack and expertise
React Native
ProficientI've been building mobile apps, websites and PWAs with React Native since 2023—first as a freelancer, then full-time at Jaji and Klesia. I pay close attention to iOS vs Android behavior and UI differences, as well as the constraints of small screens, which often require a complete UX rethink. Accessibility is also a priority: contrast, readability, touch target sizes, and consistent user flows across devices.
- Advanced navigation & deep linking
- Smooth animations (Reanimated, Gesture Handler)
- Modular, scalable architecture
- Multi-environment builds
- App Store & Play Store releases
React & Next.js
AdvancedI build modern web applications with React and Next.js, focusing on performance, clean architecture, and user experience. I've delivered multiple projects from scratch: portfolios, marketing sites with back-office, and more complex web apps. I care a lot about code structure, long-term maintainability, and best practices around SEO and performance.
- App Router & Server Components
- Reusable, typed components
- API & webhook integrations
- SEO and performance optimization
- Secure authentication
Architecture & organization
AdvancedI know how to structure a project in a clear, durable way by separating responsibilities and avoiding unnecessary dependencies. I care about separation of concerns, readability, and maintainability—especially on products that evolve over time or may be handed off to other developers.
- Clear separation of concerns (Domain, Services, ViewModels)
- Business-oriented architecture
- DRY with thoughtful abstractions
- Clearly separated "dumb" / "smart" components
- Minimizing side effects and cross-dependencies
TypeScript
AdvancedI default to TypeScript. It makes code safer, prevents regressions, and improves collaboration. I like being able to model data cleanly and get immediate feedback in the editor.
- Consistent, strict typing
- Evolvable data models
- Robust API clients
- Structured error handling
Backend
IntermediateI can build a lightweight backend when needed: REST APIs, authentication, webhooks, databases. I've integrated Stripe, Twilio, Firebase, and various third-party APIs. I'm not a backend specialist, but I can deliver a working, reliable solution end-to-end.
- REST APIs
- Auth & sessions
- Webhooks (Stripe, Discord)
- Firebase / Firestore
- PostgreSQL, Neon, Supabase
- Prisma ORM
- Third-party integrations
AI-assisted development
Enthusiastic and pragmatic
AI tools integrated into workflow
I use AI as a lever for quality and efficiency—not as a shortcut. I invest time setting up projects so they truly work with AI-assisted workflows: clear conventions, strong typing, actionable documentation, and readable architecture. My goal is to build solid, scalable, maintainable applications while taking advantage of the latest tools without compromising engineering standards.
- AI-ready workflows (strong typing, clear conventions)
- Automated and assisted code reviews
- Architecture designed for maintainability
- Fast iteration with quality checks
Leadership & coordination
For six years at Cyclofix, I managed the recruitment and onboarding of more than 1,000 independent workers. I learned how to set a clear framework, support different profiles, and keep a team moving even under pressure. Today, that experience helps me communicate effectively with product, design, and engineering teams.
Resilience & composure
My last projection event (December 2025): the European premiere of AVATAR, with James Cameron, 300 contractors, and the pressure of a flawless screening for press and influencers. In that context, you learn to stay calm, anticipate issues, and find solutions in real time. I now apply that ability to tight deadlines and critical bugs.
Communication & listening
Years working with demanding clients—Netflix, Amazon Prime, Canal+—taught me to truly listen, understand what is not explicitly said, and adapt my communication. As a developer, it helps me ask the right questions, understand what a PM or client really wants, and avoid costly misunderstandings.
Attention to detail & UX
My background in cinema and projection trained my eye for technical detail and the viewer experience. Every frame matters; every transition should feel smooth. I bring the same approach to development: I want users to have a seamless experience, with polished animations and an intuitive interface.
Career Path
My professional background
CUPRA x AVNIER
FreelanceAd shoot — General stage manager
Feb. 2026 - Feb. 2026
Noisy-le-Grand
Optic 2000
FreelanceAd shoot — First assistant camera
Sep. 2023 - Sep. 2023
Paris
Oppenheimer Screening — French Premiere
FreelanceAssistant projectionist
Jul. 2023 - Jul. 2023
Le Grand Rex, Paris
Avatar 3 Screening — European Premiere
FreelanceAssistant projectionist
Dec. 2025 - Dec. 2025
La Seine Musicale, Boulogne-Billancourt
KLESIA
Full-timeMobile app developer
Jan. 2025 - Present
Montreuil · Hybride
Jobio
FreelanceFullstack Next.js Developer / Creator
Jan. 2025 - Jan. 2026
Paris · Remote
MoodDay
FreelanceFullstack Next.js Developer / Creator
Jan. 2025 - Dec. 2025
Paris · Remote
Loïc Ghanem
FreelanceFullstack React / Next.js Developer
Jul. 2023 - Dec. 2025
Paris · Remote
Jaji
Full-timeMobile app developer
Sep. 2023 - Jan. 2025
Paris · Hybride
Weil & Associés
FreelanceFront-end React developer
Nov. 2023 - Feb. 2024
Paris
Agence Néon
FreelanceFront-end React developer
Mar. 2023 - Jan. 2024
Paris
Caroline Senyk
FreelanceFront-end React developer
Oct. 2023 - Dec. 2023
Paris · Remote
Nos Instants Précieux
FreelanceFront-end React developer
Mar. 2023 - Sep. 2023
Paris
Mail Certificate
FreelanceFront-end React developer
Feb. 2023 - May 2023
Paris · Remote
Test & Ride
FreelanceReact Native developer
Feb. 2023 - Mar. 2023
Paris · Remote
Crazee Burger
FreelanceReact Developer
Apr. 2023 - Jun. 2023
Paris
Cyclofix (Roulez Jeunesse)
FreelanceOperations manager
May 2016 - Aug. 2022
Paris
Couriier - Coursier.fr
Full-timeDispatch Coordinator & Bike Courier
Jan. 2014 - May 2016
Paris
Our Theory
FreelanceMusician / Professional Bassist
Jun. 2010 - Aug. 2016
France, Europe, Russia, US, Japan
Studio Bagel / Canal Plus
FreelanceGeneral Stage Manager
2009 - 2010
Paris area
UGC / CGR
FreelanceProjectionist Operator
2004 - 2008
France
Education
Web & Mobile Project Manager
La Capsule
2023
Full-stack Web Developer
OpenClassrooms
2022
Bachelor's degree in Cinema & Audiovisual
University Paris 8
2008