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Mario Del BarrioMD

Mario Del Barrio

Backend Developer

€150/day
Madrid, ES
0-2 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Mario

Backend developer with a background in Cross-Platform Application Development (DAM) and over a year of professional experience working with Java and Spring Boot in real enterprise environments.
I specialize in developing REST APIs and microservices architectures, with experience in Oracle and SQL databases. I work with agile methodologies and am accustomed to collaborating in a team using Git.
Available for backend development projects, API integration, and implementation of new features in existing Java systems.
If you have a project and want to talk, write to me without any obligation.
  • Spanish

    Native or bilingual

  • English

    Fluent

Remote only
Primarily works remotely

Experience

  • Minsait / Becario
    Backend Developer
    INTERNET OF THINGS (IOT)
    March 2025 - May 2025 (2 months)
    Madrid, Spain
    Maintenance of microservices. Technologies: Java, Spring Boot, Microservices, Oracle SQL, Jenkins, OpenShift, GitHub, IntelliJ IDEA, Sonar, JUnit, JMeter, Fortify.
    SQL Java Hexagonal Architecture Spring boot Apache Kafka
  • Minsait / Cliente Banco Santander
    Backend Developer
    INTERNET OF THINGS (IOT)
    March 2025 - Today (1 year and 3 months)
    Madrid, Spain
    Technologies: Java, Spring Boot, Microservices, Oracle SQL, Jenkins, OpenShift, GitHub, IntelliJ IDEA, Sonar, JUnit, JMeter, Fortify
    • • Development of Java microservices (Darwin – Spring Boot) for the Long-Term Financing area, integrated directly within the client's team.
    • • Management and maintenance of Oracle databases (SQL).
    • • Resolution of technical debt and incidents, contributing to the continuous improvement and quality of the system.
    • • Migration and modernization of applications to the latest corporate versions and technologies.
    • • Deployment of applications to production environments using Jenkins and OpenShift.
    • • Quality assurance using tools such as SonarQube, JUnit, JMeter, and Fortify.
    • • Active participation in agile teams, following good development practices, version control with GitHub, and using IntelliJ IDEA as the main IDE.
    Spring boot Java Microservices SQL Git

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Education

  • Computer Engineering
    National University of Distance Education
    2026
    Ingeniería Informatica
  • Higher Vocational Training in Cross-Platform Application Development
    IES Villaverde
    2025
    Ciclo Formativo superior de Desarrollo de Aplicaciones Multiplataforma

Skill set

Categories