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Emmanuel SteinitzES

Emmanuel Steinitz

Python & FastAPI Architect

€700/day
Les Lilas, FR
15+ years

Average response time: 1 hour

Freelancer profile translated to English.
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About Emmanuel

Do you have a web or mobile project to launch, an API to build, an application to evolve? Are you looking for a developer you can count on – from design to production.

This is what I bring, structured around three commitments:

Reliable Delivery.
I work primarily on a fixed-price basis: defined scope, clear milestones, no-surprise production deployment. 20+ years of missions have taught me that a good developer is measured by what they deliver.

Quality, Testable, and Documented Code.
Unit and end-to-end tests integrated from the project's start, CI/CD and automated deployment pipelines (GitHub Actions, Docker), rigorous code reviews. Quality is not an option added at the end – it's a discipline built from the first line.

Architecture Built to Last.
MVVM, Clean Architecture, Hexagonal Architecture...: I choose and document patterns adapted to your context, so another developer can take over the project without rewriting everything in six months.

Fullstack React / FastAPI developer, I work end-to-end on your web applications. My background in Android development (Kotlin/Java, 15 years) imposed this rigor – on mobile, architectural errors have a high cost. I apply it today to all my projects, and it gives me a concrete advantage on projects for APIs intended for mobile apps: I know both sides.

If your project also requires technical oversight or a lead role, that's a hat I can wear.

Main Stack:React · TypeScript · FastAPI · Python · PostgreSQL · Docker · GitHub Actions
Mobile:Android · Kotlin · Java
  • English

    Fluent

  • French

    Native or bilingual

Can work on-site
Les Lilas (up to 50km), Paris (up to 50km), Nantes (up to 50km), Montpellier (up to 50km), Lyon (up to 50km)

Experience

  • Dailymotion SA
    FastAPI Backend Architect and Developer
    January 2026 - Today (5 months)
    Long-term mission
    Intervened within the Dailymotion backend team on the modernization and evolution of critical services. Mission focused on code quality, robustness, and sustainability.

    Migration of legacy services to a hexagonal architecture in FastAPI:
    - Decoupling business logic / infrastructure, defining ports and adapters, documenting architectural choices.
    - Development of new features in compliance with established patterns.
    - Implementation and strengthening of unit and end-to-end tests to secure migrations and ensure non-regression.
    - Active contribution to code reviews and architectural decisions within the team.

    FastAPI · Python · Hexagonal Architecture · Unit Tests · E2E Tests · Legacy Migration · CI/CD · PostgreSQL · Docker
    FastAPI Python Hexagonal Architecture CI/CD Docker
  • Caketuzz
    Pixmind.ia SaaS
    SOFTWARE PUBLISHING
    February 2025 - Today (1 year and 4 months)
    - Conception and development, with complete autonomy, of a web platform for semantic image analysis assisted by LLM — from architecture to production deployment.
    - Solo Fullstack: React interface on the front end, FastAPI API on the back end, integration of LLM models for automatic image analysis and description.
    - Infrastructure deployed on AWS and Google Cloud, containerized with Docker, with GitHub Actions CI/CD pipeline.

    React · FastAPI · Python · LLM · AWS · Google Cloud · Docker · GitHub Actions · Fullstack Architecture
    Python React.js FastAPI Google Cloud Platform (GCP) Docker
  • Emmanuel Steinitz Consultant
    Numerous Missions in IT Service Companies or Publishers
    SOFTWARE PUBLISHING
    June 2003 - Today (23 years)
    Many varied missions in the world of mobility, multimedia, and artificial intelligence
    Team Management iOS Android JavaScript Software Architecture

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Education

  • Telecommunications & Computer Engineering
    Sup'Galilée
    2003
    Formation télécom et informatique

Certifications

  • J2SE
    Sun Microsystem
    2006
    Java

Skill set

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