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Julien SaumandeJS

Julien Saumande

CTO as a Service · AI Builder / Agentic Coding

€950/day
Paris, FR
15+ years

Average response time: 1 hour

Freelancer profile translated to English.
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About Julien

Since 2021, I have been working as a CTO as a Service, supporting startups and SMEs from the idea to the live product: structuring the tech vision, choosing architecture, building teams, and often developing myself.

More recently, I have shifted to AI-driven development. I use AI agents and agentic coding to build software faster, lighter, and smarter. This is not experimentation — this is how I deliver today.

Before that, I founded Phoceis, a digital agency specializing in mobile. In 15 years: from 0 to 40 people, expansion to Shanghai in 2014, exit in 2017 (Ineat group).

Co-founder of GEN AI Builders, the French community of professionals building with generative AI.
  • French

    Native or bilingual

  • English

    Fluent

Can work on-site
Paris (up to 10km), Lille (up to 10km)

Experience

  • Ask Eko
    CTO as a Service - Impact Project
    RETAIL (SMALL BUSINESS)
    November 2024 - Today (1 year and 7 months)
    Lille, France
    Mission for the launch of the company AskEko, which rewards citizens for eco-responsible actions with cashback: repairing or reselling a product instead of throwing it away, buying second-hand instead of new, donating to charities.
    Development from scratch of version 0, namely an end-user mobile application (Flutter) and its associated backend (.net). With API integration of several AI components, notably a Vision type LLM.
    Application launched in Fall 2025, currently being tested by several clients.
    Flutter Flutter Web ASP.NET Core Microsoft Azure LLM
  • J'ai une place !
    Co-founder & CTO — Solidarity Carpooling Application
    TRANSPORTATION
    September 2025 - Today (9 months)
    Paris, France
    Co-founder and CTO of J'ai une place !, a carpooling application designed to promote mutual aid and mobility for residents of rural areas in France. Product design, development of the mobile application in Flutter and the backend in .NET Core. Integration of geolocation, matching between drivers and passengers, and real-time notification functionalities. Social impact project aimed at combating isolation in rural areas.
    Flutter ASP.NET Core PostgreSQL Firebase Mobile Application
  • MyMag
    Development of a complete ERP (mobile + back-office + API).
    RETAIL (LARGE RETAILERS)
    June 2025 - December 2025 (6 months)
    Lille, France
    Development of an ERP for an SME operating in the retail sector.
    Creation of a complete ERP including the administration interface for the management team, and the mobile application for field employees.
    Some features: mission management, contract management, timesheets, consumables.
    Integration of an LLM to accelerate mission creation by analyzing customer requests sent by email to the company.
    Tools developed in Flutter and .NET Core
    CICD Code Magic / GitHub Actions
    dotnet core LLMs Flutter Vibe coding

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Education

  • Engineer
    Ecole Centrale
    2000
    Option Entrepreneur
  • Managing Innovation
    Stanford University
    2017
    Stanford Center for Professional Development - Managing Innovation

Skill set

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