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Jonatan García FerreraJG

Jonatan García Ferrera

Senior Java Software Engineer | Spring Boot

€400/day
Las Palmas de Gran Canaria, ES
8-15 years

Average response time: 1 hour

About Jonatan

I'm a skilled software engineer with a decade of experience in the industry, currently based
in Gran Canaria. Throughout my career, I've honed my expertise in back-end development, with a strong focus on Java and Spring technologies. However, I'm also proficient in Python and have experience with front-end technologies such as JavaFX, Android, Vanilla JS and React.
  • Spanish

    Native or bilingual

  • English

    Fluent

  • German

    Basic

Remote only
Primarily works remotely

Experience

  • Huxley,
    Freelance Senior Software Engineer
    March 2025 - December 2025 (9 months)
    Adevinta, Barcelona, Spain
    As a Senior Software Engineer, I have been responsible for driving the technical efforts behind the de-merging of the system currently used across multiple verticals. The goal of this initiative is to simplify subsystem dependencies, improve scalability, and enable the company to sell verticals as independent units.
    Software Architecture Java Spring boot External API integration Flyway
  • Altia
    Freelance Senior Software Engineer
    March 2025 - Today (1 year and 3 months)
    As a Senior Software Engineer, I worked closely with a team of expert engineers to modernize the European Patent Office's (EPO) Translation Hub, a mission-critical platform that integrates multiple subsystems to deliver the most accurate translations across diverse document types and languages. I contributed to designing and implementing scalable services, improving system reliability, and optimizing internal workflows to handle high-volume translation requests efficiently. My work involved enhancing API integrations between subsystems, improving performance, and ensuring compliance with strict quality and security standards. This modernization effort helped streamline translation processes for the EPO, enabling faster and more precise multilingual communication that supports patent examination and international collaboration.
  • Mirai
    Freelance Senior Software Engineer
    March 2025 - Today (1 year and 3 months)
    As a Senior Software Engineer, I have been responsible for integrating and refactoring existing business logic into new microservices, driving improvements in architecture, scalability, and overall system performance. My role involves close collaboration with cross‑functional teams to design, document, and implement solutions aligned with domain‑driven principles. I contribute to both high‑level architectural decisions and low‑level design reviews, ensuring consistency, modularity, and future extensibility. Additionally, I apply test‑driven development practices to deliver robust and maintainable code, while monitoring system health and performance through observability tools such as Grafana.

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Education

  • Master's Degree
    La Rioja International University
    2026
    Master's Degree
  • Postgraduate Certificate
    La Rioja International University
    2022
    Postgraduate Certificate

Skill set

Categories