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Roberto BullónRB

Roberto Bullón

Backend Developer | Java, Microservices, Spring

€200/day
Sevilla, ES
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Roberto

I am a software developer with more than two years of experience in Backend development.

I have successfully worked in different development teams, collaborating closely with frontend programmers, and I bring solid knowledge in backend development and API design and integration, ensuring seamless integration between business logic and user interfaces.

My technical skills, combined with my experience in multidisciplinary teams and effective communication, make me an ideal candidate for technology teams looking for a backend developer eager to learn, passionate about technical excellence, and with a proactive approach to automation and efficiency in software development.
  • Spanish

    Native or bilingual

  • English

    Fluent

Remote only
Primarily works remotely

Experience

  • emergya
    Mid-Senior Backend Developer
    August 2025 - Today (11 months)
    Development of new features in Java 17 within a monolithic application, contributing to the evolution and maintenance of the system. I manage and monitor batch/pre-processed jobs for product indexing and other critical system flows. I perform deployments in multiple environments using Jenkins, ensuring stability in the different phases of the lifecycle. I collaborate in the maintenance of legacy parts of the system using AngularJS.
    Java Jenkins Solr AngularJS Bash
  • bebeyond
    Backend Developer
    March 2024 - June 2025 (1 year and 3 months)
    I led the development of a microservices Rest API (Java with Spring Boot, Node.js, and Python), applying SOLID, Clean Code, and DDD principles to improve its scalability and maintainability. I managed development, QA, and production environments, ensuring continuous and secure deployments. I implemented unit tests with Mockito and JUnit, achieving over 80% code coverage validated by SonarQube, which reduced errors in QA and production. I containerized services with Docker and published versioned images to facilitate frontend team local API execution, reducing integration and testing times. I orchestrated asynchronous events between microservices with Kafka.

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Education

  • Higher Degree in Application Development
    SAFA
    2024

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