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Emilio Javier Mateo GimenezEJ

Emilio Javier Mateo Gimenez

Software Architect & Full Stack Engineer

€300/day
Valencia, ES
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Emilio Javier

Programming is easy. The difficult part is building software that solves real business problems without generating infinite technical debt.

With over 5 years of experience as a Full Stack developer, I've specialized in transforming complex environments into efficient and scalable solutions. My approach is simple: less noise, more results. I don't just 'code'; I get involved in the architecture and business logic to ensure every line of code adds value.

How can I help you?

✅ Robust Backend Architectures: Expert in Spring Boot, NestJS, and Node.js for systems that require performance and security.

✅ High-level Interfaces: Development with Angular focused on user experience and complex data visualization (Dashboards, genetic tools, etc.).

✅ Process Optimization: ERP integration, e-commerce stock automation, and legacy system refactoring.

I've worked in sectors ranging from logistics and e-commerce to bioinformatics, tackling challenges where precision and scalability are non-negotiable.

I live and work with the clarity that the mountains give me and the discipline of a senior developer. If you're looking for a technology partner who speaks your language and gets straight to the point, let's talk.

🔗 Portfolio: ematgim.dev
  • Spanish

    Native or bilingual

  • English

    Fluent

  • Catalan

    Fluent

Remote only
Primarily works remotely

Experience

  • Power Electronics
    Senior Full Stack Developer
    ENERGY AND UTILITIES
    October 2025 - Today (8 months)
    Valencia, Spain
    I evolve the neural platform for technical support and stock management. Optimization of core code using NestJs and Angular, ensuring absolute reliability and seamless integration with SAP and MongoDB.
    Angular Software Architecture External API Integration NestJs Docker
  • Boluda Corporación Marítima
    Full Stack Developer
    LOGISTICS AND SUPPLY CHAIN
    September 2024 - October 2025 (1 year and 1 month)
    Valencia, Spain
    I designed the architecture for the global control platform for tugboats. Real-time integration with port APIs (PCS) and SAP, operating on MariaDB and Docker Swarm.
  • Sistemas Genómicos
    Architecture Assistant & Full Stack
    BIOTECH
    September 2022 - August 2024 (1 year and 11 months)
    Valencia, Spain
    I collaborated on the design of an event-driven architecture for massive genomic analysis. Orchestration using Kubernetes and processing with Kafka and MongoDB.

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Education

  • Higher Technician in Cross-Platform Application Development, Computer Programming
    IES Henri Matisse
    2020
    Tecnico Superior en Desarrollo de aplicaciones Multiplataforma, Programación informática
  • Technician in Microcomputer Systems and Networks
    IES Henri Matisse
    2018
    Tecnico en sistemas microinformaticos y redes

Certifications

  • First Certificate in English (B2)
    British Council
    2018

Skill set

Categories