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Yanis O.YO

Yanis O.

Product Builder Fullstack | AI, Web & Mobile SaaS

€500/day
1 project
Marseille, FR
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Yanis

I design and develop digital products end-to-end: SaaS, web applications, mobile apps, internal tools, and MVPs.

Many projects start with a list of features. I prefer to start with a simpler question: are customers already willing to pay for the solution?
It's generally more profitable to sell an imperfect product to real customers than to spend six months perfecting a product that no one will buy.

I don't just develop what I'm asked for. My role is also to help transform a sometimes vague idea into a coherent, feasible, and relevant product.

For example, a client might come with:
"I would like to develop a matchmaking application."

From there:
  • Who are the two types of users?
  • How to create enough value to attract early adopters?
  • How to handle the chicken-and-egg problem?
  • What is the real value proposition?
  • How to prevent fraud? Is KYC needed?
  • Mobile app, website, or both?
  • How to monetize the service?
  • What is the smallest MVP capable of validating the idea?

I intervene mainly on:

→ Transforming an idea into a concrete and marketable product
→ Defining the MVP, technical choices, and feature prioritization
→ Developing SaaS, web, and mobile applications
→ Technical architecture, cloud, and deployment
→ Application security and reliability
→ Optimizing user experience and conversion

Main stack: Next.js, React, Node.js, TypeScript, Swift, Kotlin, Docker, AWS, GCP, Vercel, Supabase, CI/CD.

If you already have all the answers, or if you simply want to execute a technical specification to the letter, you probably don't need me.

On the other hand, if you have an idea, hypotheses to validate, or a product to build intelligently, send me a message :)
  • French

    Native or bilingual

  • English

    Native or bilingual

Can work on-site
Marseille (up to 50km)

Experience

  • ES PLAN
    Malt logoOn Malt
    Design and development of the Ciao Focaccia mobile platform
    RESTAURANTS AND FOOD SERVICE
    May 2026 - June 2026 (1 month)
    Marseille, France
    Ciao Focaccia is a restaurant chain that wants to offer a digital experience beyond a simple ordering or loyalty app. The goal was not to develop a simple ordering or loyalty app, but a true platform to enhance the customer experience and strengthen the relationship between the restaurant and its customers.

    I supported the project end-to-end: product thinking, feature definition, user experience design, technical architecture, and development of the mobile applications, backend, and administration interface.
    Product Development Mobile Application Cash Register Management External API Integration User Experience Design
  • PokoLabs
    Co-Founder & CEO
    INTERNET OF THINGS (IOT)
    December 2025 - Today (8 months)
    Co-founder of PokoLabs, we are building a new generation of AI products focused on connection, not just performance.

    Our main project: Nyo, a connected plush toy designed for children, with a voice, a memory, and a real personality. The goal: to create an authentic connection, without screens. Designed with a secure and ethical approach, so parents can trust it.

    At PokoLabs, we develop AI companions designed to create a real connection with a voice, a memory, and a personality. The objective: to transform the way users interact with AI, on a daily basis.
    Branding Product Development Hardware Embedded Systems Storytelling
  • Foxgate.io
    Founder · Product & Engineering
    SOFTWARE PUBLISHING
    December 2024 - August 2025 (8 months)
    Marseille, France
    🧠 Foxgate.io — a SaaS project I designed, developed, and put into production from A to Z.

    The idea: rethink email management in the age of information overload, by automatically filtering and prioritizing messages before they even reach the main inbox.

    The product worked, the infrastructure held up, but the project didn't find its market.

    And that's precisely where I learned the most.

    Building Foxgate allowed me to go through a complete cycle: imagining a product, developing it, deploying it at scale, measuring its adoption — and understanding why it didn't take off.

    I learned more from it than from projects that "work":

    the difference between a technically solid product and a product that is actually adopted
    the importance of positioning and timing
    how to build reliable infrastructure without unnecessary over-engineering
    and above all, when to stop, analyze, and move on

    🔧 Technically, the project was based on a complete and distributed stack:

    email pipeline with Rust SMTP agents
    full-stack architecture (Next.js / Node.js)
    cloud infrastructure optimized for performance and resilience
    asynchronous and scalable processing

    Foxgate didn't work out, but it gave me something much more valuable:
    a concrete understanding of what it takes to go from an idea to a real product — and the reasons why it can fail.

    It's this experience that I apply in my current projects today.
    Docker docker-compose Branding Email Automation SEO

Reviews

5.0

Out of 1 rating

F

Fabio

Developpeur - ES PLAN

Reviewed on 6/29/2026

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Education

  • Bachelor's Degree, Computer Science
    Aix-Marseille University
    2025
    Licence, Informatique

Skill set

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