Mobile engineering · Product craft

    YoannAndrieux

    React Native Dev

    Frontend and mobile developer with a passion for UI/UX and careful details. My unconventional path, shaped by six years in management, helps me combine technical rigor, empathy and efficiency. I design clear, robust and enjoyable React Native applications and React/Next.js products, from product framing through delivery.

    100K+

    Mobile production

    22+

    Business modules

    59+

    UI components

    Yoann Andrieux
    KLESIAJajiPressayParigo Music — product redesignMooddayPortfolio Loïc Ghanem

    Selected work

    Mobile foundations, product decisions

    Production React Native experience first, followed by four case studies showing framing, trade-offs and delivery.

    01Mobile insurance · Production

    KLESIA

    White-label retirement & benefits management mobile app

    Constraint
    Make one multi-tenant application support business modules, brands and delivery environments without fragmenting the experience.
    Decision
    A Clean/DDD modular foundation, typed boundaries and a shared design system across iOS and Android.
    Impact
    A production application that remains evolvable across 22+ business modules and 12 delivery configurations.

    100K+

    production downloads

    02Mobile health insurance · Product team

    Jaji

    Mobile app for health insurance and financial services

    Constraint
    Deliver sensitive health-insurance journeys while keeping state, notifications and native behavior predictable.
    Decision
    Hybrid Redux/RxJS state, explicit domain mapping and observable Firebase delivery signals.
    Impact
    Core reimbursement, contract, beneficiary and document journeys delivered in a production app.

    50K+

    mobile downloads

    03Native macOS · Universal voice · Local-first

    Pressay

    Pressay 2 turns speech into text locally across macOS applications, without an account or Internet connection. The public beta introduces Signal OS, three signed local models and remote routes that always remain explicit.

    Constraint
    Run offline on Apple Silicon Macs using macOS 14 or later.
    Decision
    Fast, Polyglot and Precise transcribe on the Mac without an account or quota.
    Impact
    Free local dictation triggered by hold/release or toggle.

    arm64

    native binary

    Read the case study
    04Freelance · Product & frontend

    Parigo Music — product redesign

    End-to-end redesign of Parigo Music's product, art direction and frontend

    Constraint
    Replace a functional catalogue website with a coherent product experience without losing access to the existing music library.
    Decision
    A ground-up frontend and design-system rebuild centered on search, editorial navigation and listening.
    Impact
    A new dark editorial experience, currently in development, supported by automated tests and Preview deployments.

    Ongoing

    complete redesign

    05Sensitive product · Offline-first · Permissions

    Moodday

    Moodday is a non-clinical companion for mood and treatment tracking. The redesign focuses on offline continuity, multi-time reminders, privacy and revocable caregiver sharing.

    Constraint
    Never lose or duplicate a check-in or intake after network loss.
    Decision
    IndexedDB stores each operation with an ID, status, bounded retry and explicit conflict resolution; the server mirrors it with idempotency.
    Impact
    A short daily journey that works without a network.

    122/122

    active tests

    Read the case study
    06Creative web · 3D experience

    Portfolio Loïc Ghanem

    Immersive portfolio for a film/video game/commercial music composer with 3D, mapping, audio player and back-office

    Constraint
    Turn a rich musical career into an experience that stays clear while combining audio, maps, editorial content and 3D.
    Decision
    A progressive experience built around reusable content, immersive scenes and an administration interface.
    Impact
    A distinctive portfolio that remains maintainable and gives every collaboration a place.

    3D

    immersive interface

    Project preview / 01phone

    KLESIA

    01Mobile insurance · Production

    KLESIA

    White-label retirement & benefits management mobile app

    Constraint
    Make one multi-tenant application support business modules, brands and delivery environments without fragmenting the experience.
    Decision
    A Clean/DDD modular foundation, typed boundaries and a shared design system across iOS and Android.
    Impact
    A production application that remains evolvable across 22+ business modules and 12 delivery configurations.

    100K+

    production downloads

    02Mobile health insurance · Product team

    Jaji

    Mobile app for health insurance and financial services

    Constraint
    Deliver sensitive health-insurance journeys while keeping state, notifications and native behavior predictable.
    Decision
    Hybrid Redux/RxJS state, explicit domain mapping and observable Firebase delivery signals.
    Impact
    Core reimbursement, contract, beneficiary and document journeys delivered in a production app.

    50K+

    mobile downloads

    03Native macOS · Universal voice · Local-first

    Pressay

    Pressay 2 turns speech into text locally across macOS applications, without an account or Internet connection. The public beta introduces Signal OS, three signed local models and remote routes that always remain explicit.

    Constraint
    Run offline on Apple Silicon Macs using macOS 14 or later.
    Decision
    Fast, Polyglot and Precise transcribe on the Mac without an account or quota.
    Impact
    Free local dictation triggered by hold/release or toggle.

    arm64

    native binary

    Read the case study
    04Freelance · Product & frontend

    Parigo Music — product redesign

    End-to-end redesign of Parigo Music's product, art direction and frontend

    Constraint
    Replace a functional catalogue website with a coherent product experience without losing access to the existing music library.
    Decision
    A ground-up frontend and design-system rebuild centered on search, editorial navigation and listening.
    Impact
    A new dark editorial experience, currently in development, supported by automated tests and Preview deployments.

    Ongoing

    complete redesign

    05Sensitive product · Offline-first · Permissions

    Moodday

    Moodday is a non-clinical companion for mood and treatment tracking. The redesign focuses on offline continuity, multi-time reminders, privacy and revocable caregiver sharing.

    Constraint
    Never lose or duplicate a check-in or intake after network loss.
    Decision
    IndexedDB stores each operation with an ID, status, bounded retry and explicit conflict resolution; the server mirrors it with idempotency.
    Impact
    A short daily journey that works without a network.

    122/122

    active tests

    Read the case study
    06Creative web · 3D experience

    Portfolio Loïc Ghanem

    Immersive portfolio for a film/video game/commercial music composer with 3D, mapping, audio player and back-office

    Constraint
    Turn a rich musical career into an experience that stays clear while combining audio, maps, editorial content and 3D.
    Decision
    A progressive experience built around reusable content, immersive scenes and an administration interface.
    Impact
    A distinctive portfolio that remains maintainable and gives every collaboration a place.

    3D

    immersive interface

    Web → iPhone

    Two formats. One portfolio.

    The same content is reorganized as a real interactive mini-app, with its own navigation and mobile rhythm.

    Mobile engineering · Product craft

    YoannAndrieux

    React Native Dev

    Frontend and mobile developer with a passion for UI/UX and careful details. My unconventional path, shaped by six years in management, helps me combine technical rigor, empathy and efficiency. I design clear, robust and enjoyable React Native applications and React/Next.js products, from product framing through delivery.

    View my workContact mePDF

    100K+

    Mobile production

    22+

    Business modules

    59+

    UI components

    00:00

    Paris, France

    YoannAndrieux

    React Native Dev

    Yoann Andrieux

    100K+

    Mobile production

    22+

    Business modules

    59+

    UI components

    Frontend and mobile developer with a passion for UI/UX and careful details. My unconventional path, shaped by six years in management, helps me combine technical rigor, empathy and efficiency. I design clear, robust and enjoyable React Native applications and React/Next.js products, from product framing through delivery.

    Explore

    Capabilities

    Skills proven through delivery

    I'm a front-end and mobile developer with an atypical background: after a degree in cinema, I spent ten years in events and management before transitioning into software development. That journey gave me a different perspective: I don't just see lines of code, I focus on the experience they create for the end user. I keep the same attention to detail.

    klesiajaji

    React Native in production

    Native-feeling journeys, business modules and reliable iOS/Android delivery on applications used at scale.

    Decisions made

    • Modular domain boundaries
    • Shared UI foundations
    • Observable multi-environment delivery

    Visible evidence

    • 100K+ production downloads
    • 22+ business modules
    • 59+ shared UI components

    Working method

    AI, integrated into the 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.

    Human in the loop

    The tool accelerates the work. Responsibility stays human.

    Every assisted output returns to an explicit contract: product intent, types, review, tests and release boundaries.

    Agentic workflowsSpecialized agentsContext engineeringMCPHuman reviewTyped guardrails
    1. PrepareFraming, architecture, task breakdown and useful context.01
    2. BuildSpecialized agents, implementation and documentation in the same loop.02
    3. VerifyHuman review, types, tests and explicit delivery boundaries.03

    4. Toolbox

      CopilotClaudeCodexCodeRabbitMCPPlugins

    Work & missions

    Complete journey

    All of my technical, management and creative experience remains available without competing with the main evidence.

    26 entries

    2026 · Case study

    Pressay

    Hold, speak, release — to write from any application.

    Thread

    A path built across disciplines

    Cinema taught me precision. Operations taught me clarity. Product and mobile brought both together.

    1. 01 · 2004—2026

      Cinema & projection

      Every frame matters: preparation, calibration and calm under live constraints shaped my attention to user experience.

    2. 02 · 2016—2022

      Operations & management

      Six years coordinating people and operations taught me to clarify a framework, listen and deliver under pressure.

    3. 03 · 2022—2026

      Web products

      Moving from interfaces to products meant learning to reduce scope, expose trade-offs and verify delivery.

    4. 04 · 2023—2026

      React Native

      Mobile brings the whole path together: technical rigor, product empathy and care for every interaction.

    One resume. The complete path.

    FR · EN · PDF

    Contact

    A product team to join?

    Tell me about the context, the team and the problems you want to solve. I’ll reply with the same level of care.

    Send me a message

    Yoann Andrieux

    © 2026 · React Native Dev

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