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Julian LopezJL

Julian Lopez

Backend .NET Developer | Azure Expert

€650/day
Paris, FR
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Julian

Backend .NET developer with over 10 years of experience, I work as a freelancer on the design, modernization, and optimization of critical applications.
My expertise in Azure cloud and distributed architectures allows me to deliver robust, scalable solutions adapted to business challenges.
I can also intervene occasionally on the front-end (React/TypeScript) to streamline integration.

✅ What I do:
– .NET Core backend development / REST APIs / microservices
– Migration to Azure Cloud (App Services, Service Bus, SQL/MongoDB/PostgreSQL databases)
– Implementation and improvement of CI/CD pipelines (Azure DevOps, GitHub Actions, Terraform)
– Performance optimization (SQL queries, application monitoring)

🛠 Tech & environments:
.NET (Core, 5–9), C#, Azure, SQL Server, MongoDB, PostgreSQL, Entity Framework, Terraform, React/TypeScript

📍 Available for freelance missions:
– .NET backend development
– Azure Cloud migration
– Front/back integration and CI/CD industrialization
  • French

    Native or bilingual

  • English

    Fluent

Can work on-site
Paris (up to 15km), Nanterre (up to 15km), Rueil-Malmaison (up to 15km), Boulogne-Billancourt (up to 15km), Issy-les-Moulineaux (up to 15km)

Experience

  • Roole
    Backend Developer
    BANKING AND INSURANCE
    July 2024 - March 2025 (8 months)
    Boulogne-Billancourt, France
    • Complete redesign of a critical IS backend in .NET on Azure
    • Agile organization consulting: coordination of 3 product teams, implementation of delivery indicators
    • Facilitation of technical design workshops (event storming, cloud architecture)
    • Writing architecture documents and best practice guides
    .NET Méthode agile Cloud Azure MongoDB
  • TF1 - Pôle R&D
    Development Manager
    PRESS AND MEDIA
    June 2022 - August 2023 (1 year and 2 months)
    Boulogne-Billancourt, France
    • Research and prototyping of innovative solutions (AI, cloud, blockchain)
    • Representation at internal and external events (VivaTech, partner trade shows)
    • Management of POCs and support for industrialization in coordination with CIOs
  • CRITEO
    Senior IT Developer – Team Lead
    DIGITAL AND IT
    November 2019 - May 2022 (2 years and 6 months)
    • Supervision of 6 developers on critical backend projects
    • Management of the migration to Azure Cloud (infrastructure as code, CI/CD)
    • Implementation of code standards and tools ensuring development quality
    • Active participation in recruitment (tests, technical interviews)

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Education

  • AWS Machine Learning
    2023
    AWS Machine Learning
  • Microsoft AZ-203 & AZ-400 – Solutions Azure / DevOps
    2020
    Microsoft AZ-203 & AZ-400 – Solutions Azure / DevOps

Skill set

Categories