David Tortajada

Senior Java Developer

Senior Java Developer | E-commerce Expert

With more than 15 years of experience, I’ve built and optimized e-commerce platforms for global brands. My approach combines the robustness of enterprise architectures with the agility of modern development.

🛠️ Tech stack

  • Backend: Java (Expert, upgrading to 17/21), Spring Boot, J2EE, C#/.NET.
  • E-commerce: Intershop (Expert, versions 7.5 to 7.9).
  • Search & Data: Solr, Oracle, MSSQL, InfluxDB.
  • DevOps & Cloud: AWS, Azure, Git, CI/CD, Jenkins, Docker.
  • Methodologies: Scrum (PSM I certified), Kanban, Agile.

🚀 Selected experience

Independent Engineering & Java Refresh

May 2024 – Present

After years of consulting for major retailers, I’m in a phase of technical evolution:

  • Modern Java: Implementing current architectures with Java 17/21 and Spring Boot 3.
  • Applied IoT (Home Lab): End-to-end design of an energy ecosystem with 5.28 kWp of solar power and DIY storage.
  • Automation: Programming control logic in Home Assistant (YAML, Python) for smart energy management.
    • More details in my Home Lab section (in Spanish).

Freelance Java & Intershop Consultant (Valtech / Wunderman Thompson)

November 2020 – May 2024

  • Development and maintenance of platforms for top-tier European retailers.
  • Implementation of REST APIs and microservices to integrate third-party systems.
  • Solr search optimization and Oracle/MSSQL query tuning for high-concurrency environments.

Java & Intershop Consultant (Incentro)

July 2013 – November 2020

  • Technical leadership in critical Intershop (7.5 → 7.9) migrations for clients such as G-Star RAW and Wolters Kluwer NL.
  • 24/7 availability for mission-critical systems.
  • Management of complex replication flows, massive catalogs and promotions.

Earlier career (2007 - 2013)

  • C# Developer (Santander Town Hall): Web applications in .NET and WCF.
  • Java Analyst (Mutua Madrileña): Maintenance of J2EE systems with Spring and Hibernate.
  • Junior Developer (Indra): Development of insurance platforms with Struts and Ajax.

🎓 Education and certifications

  • Technical Engineering in Computer Systems – University of Zaragoza.
  • Professional Scrum Master (PSM I) – Scrum.org.
  • Angular 8 & Cybersecurity Training.
  • Intershop Developer Certified.

🎯 How I work

“I believe in clean code, in understanding the business before writing the first line, and that the best technology is the one that solves the problem in a scalable and maintainable way.”

Shall we talk?

If you need a senior profile able to cover everything from the backend to data architecture: See automation projects (ES) Get in touch