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Guillaume PoumaratGP

Guillaume Poumarat

Lead .Net Developer

€750/day
Paris, FR
15+ years

Average response time: 1 hour

Freelancer profile translated to English.
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About Guillaume

Senior Developer & Digital Strategist - 20 years of expertise at your service for your tech projects
Since 2005, I have been supporting startups, SMEs, and large companies in the development of high-performance, scalable, and user-centric web and mobile applications.

Specializing in Microsoft (.NET) and JavaScript (React, Node.js, Vue.js) environments and modern architectures (Docker, cloud, API-first), I am passionate about high-impact projects: B2B SaaS, auction platforms, business tools, process automation.

What I bring to you:

  • Expert insight to frame your needs and propose robust solutions
  • Clean code execution focused on performance and maintainability
  • Fluid communication, tested deliverables, and a true product culture

My goal: to help you go faster, further, with a tailor-made product that creates value.

Contact me to discuss your project!
  • Spanish

    Basic

  • English

    Fluent

  • French

    Native or bilingual

Can work on-site
Paris (up to 50km), Paris (up to 30km)

Experience

  • Agorastore
    Lead Developer
    September 2021 - Today (4 years and 11 months)
    Montreuil, France
    Successfully led a team of developers, ensuring effective collaboration and high-quality results.
    • IT Steering Committee Member: Actively contributed to strategic decisions as a member of the IT steering committee, influencing the company's technological directions.
    - Salesforce and Business Central Integration: Successfully led the integration of Salesforce and Business Central, improving operational efficiency and data management.
    • Recruitment: Recruited developers to expand the Agorastore teams.
    • Feature Development: Designed and implemented features in both the back office and the marketplace, enhancing user experience and increasing product added value.
    • Technical Migration: Orchestrated a technical migration, ensuring a transition to new technologies and improving overall system performance.
    • Technical Redesign: Orchestrated a technical redesign to accommodate Agorastore's acquisition strategy.
    • Technical Redesign: Orchestrated a technical redesign to accommodate Agorastore's acquisition strategy.
    DevOps - Infrastructure - IAC Pulumi, GitHub Actions (CI/CD) - Azure - AWS - Ansible - Marathon - Implemented robust DevOps practices using Infrastructure as Code (IaC) with Pulumi, GitHub Actions for CI/CD, and deployed on Microsoft Azure.
    Microsoft Azure ASP.NET Node.js React.js Nuxt3
  • Younited Credit
    Senior Developer
    November 2019 - September 2021 (1 year and 10 months)
    Paris, France
    Feature Team Completion/Contact: Played a role within the Completion/Contact team, responsible for the complete management of the file completion process and customer relationship management.
    File Completion Management: Led efforts related to document upload, automatic document analysis, identity verification, and bank aggregation. These initiatives significantly improved process efficiency.
    Customer Relationship Management: Oversaw initiatives related to the customer portal, the Back Office for request tracking, and communication tools (email, SMS, phone), thereby strengthening customer engagement.
    Technological Environment: Collaborated in a modern technological environment including .Net Core, Angular, Azure DevOps, Azure Cosmos DB, SQL Azure, Azure Service Bus, Azure Function, with Agile and Kanban methodology.
    Key Skills Implemented:
    Development: .Net Core, Angular
    Project Management: Azure DevOps
    Databases: Azure Cosmos DB, SQL Azure
    Integration and Communication: Azure Service Bus, Azure Function
    Methodologies: Agile, Kanban
    Angular C# Microsoft Azure Azure Service Bus Azure Cosmos DB
  • MEGA International
    Senior Developer
    June 2016 - November 2019 (3 years and 5 months)
    14th arrondissement, 75014 Paris, France
    Responsibilities within the innovation team:
    Played a key role within Mega's innovation team, focusing on cutting-edge projects using agile methodologies such as Scrum, KANBAN, TDD, and BDD.
    Notable projects:
    Diagram Recognition Mobile Application (XAMARIN):
    Successfully led the implementation of an innovative Xamarin-based mobile application, offering an advanced diagram recognition solution.
    Unified Authentication Microservice:
    Developed a unified authentication microservice supporting market standards such as SAML2, OPENID, OAUTH2, enhancing security and ease of access.
    Microservice Implementation:
    Contributed to the implementation of microservices using advanced technologies such as Service Fabric, Docker, Kubernetes, .Net Core, VSTS, and Azure, ensuring a scalable and robust architecture.
    Internal Tool Development:
    Created essential internal tools using .Net Core, NodeJS, and Electron, improving operational efficiency and team productivity.
    Technological Environment:
    Successfully experienced in a diverse technological environment involving Xamarin, Service Fabric, Docker, Kubernetes, .Net Core, VSTS, Azure, .Net Core, NodeJS, Electron.
    Methodologies:
    Expertise in applying agile methodologies such as Scrum, KANBAN, TDD, and BDD to ensure efficient and high-quality delivery.
    .NET Node.js

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