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Juan José CumbaJJ

Juan José Cumba

Senior Microsoft Technologies Developer

€350/day
Barcelona, ES
15+ years

Average response time: 1 hour

Freelancer profile translated to English.
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About Juan José

With over 20 years of experience in developing technological solutions, I have worked in multiple sectors, including fintech, airlines, and insurance, in companies such as AXA Partners and Vueling. My main focus is development with Microsoft technologies (.NET Core, SQL Server, Azure) and React for the frontend, creating robust and scalable applications that support large volumes of data and transactions.

Now, as a freelancer, I offer my services to help companies solve their technological challenges, from creating high-performance APIs to developing interactive and efficient user interfaces. I am passionate about process optimization, code quality, and continuous improvement in every project I undertake.
  • Russian

    Basic

  • English

    Fluent

  • Spanish

    Native or bilingual

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

Experience

  • axa
    Technical Lead
    September 2020 - Today (5 years and 9 months)
    I have been leading a development team for over 4 years. The project consists of an API that acts as the main gateway to the CMS (Salesforce). The various assistance lines of business within AXA interact with the company’s CMS exclusively through the project I lead. We handle thousands of requests daily and orchestrate processes by connecting with several internal and external APIs. This is a mission-critical project for the company, requiring an SLA of nearly 100%.

    Technologies used include .Net Core 8.0, Azure Functions, Service Bus for queues, Redis, Azure App Configuration, Application Insights, CosmosDB, SonarQube, among others.
    .NET .NET Core SQL Server Microsoft Azure Azure DevOps React Cosmos DB
  • Vueling
    Experienced Consultant
    AVIATION AND AEROSPACE
    March 2018 - August 2020 (2 years and 5 months)
    Barcelona, Spain
    At Vueling, I was the technical lead of the Revenue Management team. We developed the pricing control system for tickets across all flights. This was a highly critical process for the company since sales channels relied on the prices calculated by our system.

    We used .Net Core with automated processes, Microsoft SQL Server, and MVC 5.0 with Razor for the frontend.
    .NET .NET Core C# CSS SASS React SQL Server MongoDB Microsoft Azure Azure DevOps
  • R/GA
    Associate Technology Director
    INTERNET OF THINGS (IOT)
    April 2016 - March 2018 (1 year and 11 months)
    Buenos Aires, Argentina
    As an Associate Technology Director at R/GA, I am responsible for leading several development teams working with different front-end and back-end technologies. I also lead client interactions for projects.
    Furthermore, my responsibilities include designing technological solutions, architectures, workflows, timelines, budgets, and resource allocation according to project requirements.
    Technologies: Node.js, React.js, Angular.js, all Microsoft .Net framework, MS Sql Server, MySql, Neo4j, MongoDB, others.

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