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Rubén Martínez MarínRM

Rubén Martínez Marín

Java Backend Developer

€100/day
Murcia, ES
0-2 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Rubén

I am a software developer specializing in creating robust, scalable web applications focused on solving real business problems. My primary focus is Full Stack development, encompassing everything from the design of complex backend architectures to the implementation of efficient user interfaces.

Throughout my career, I have developed complete SaaS platforms from scratch, facing real challenges such as multi-tenant architecture, data security, and compliance with rigorous technical regulations (such as electronic invoicing integration and SHA-256 encryption).
  • Spanish

    Native or bilingual

  • English

    Fluent

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

Experience

  • Ibernetic (Sector farmacéutico)
    Full-Stack Developer
    September 2025 - January 2026 (4 months)
    Development of functionalities in pharmaceutical management software under a microservices architecture and MVC pattern using a proprietary framework. Optimization of SQL queries in MySQL in critical medication dispensing modules, improving response times in high-frequency operations. Development of RESTful APIs with TypeScript for integration between microservices and frontend (SolidJS). Implementation of an interactive medication tracking calendar, CSV export modules, PDF generation, and real-time notifications via WebSockets, along with monitoring of background processes and resolution of critical production bugs.
    REST APIs PHP MySQL Git Gitlab
  • Ayuntamiento de Abanilla
    Administrative Assistant
    October 2023 - October 2024 (1 year)
    Automation of case management processes using VBA and Microsoft Access, reducing document management time by approximately 20% compared to the previous Word-based system. Analysis and design of requirements for migrating the system to a modern Spring Boot + React architecture (Case Manager project). Coordination with technical personnel for digitalization of data flows and modernization of internal records.
    Microsoft Access Microsoft Excel VBA

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Education

  • Higher Technician in Multiplatform Application Development (DAM)
    UNIR FP
    2025
    Técnico Superior en Desarrollo de Aplicaciones Multiplataforma (DAM)
  • Specialist Course in Cybersecurity
    EOI (School of Industrial Organization)
    Curso de Especialista en Ciberseguridad

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