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Eduardo Diaz

Software Engineer | Java Backend Specialist

Education

Assoc. Degree, Multiplatform Software Development

CEU San Pablo University
2019 - 2021

MSc in Biomedical Science

University of Valencia
2013 - 2015

BSc (Hons) in Biotechnology

Pablo Olavide University
2008 - 2013

Languages

  • English (Professional - IELTS 7.5)
  • Spanish (Native)

Career Profile

I love the art of building software that is simple, stable, and built to last. I’m a firm believer that less code is better, and my journey from clinical science helped me appreciate the value of precision and repeatability. I’m a high-ownership engineer who is passionate about the craft of coding and bringing an enthusiastic, curious mindset to every technical challenge.

Professional Experience

Java Backend Software Engineer

Contal Group; Brisbane - Sep 2024 - Present

I’m currently leading the end-to-end design, implementation, and migration of a greenfield rostering platform. I manage the full stack—from architecting the relational database and Spring Boot REST APIs to the React frontend. My focus is on building a modular, API-first architecture that is clean and scales easily.

I also maintain, develop and troubleshoot our legacy system.

Stack: Java (Spring Boot), Hibernate, React, JavaScript, Node.js, SQL, JUnit, Mockito, Docker, Git.

Software Engineer (Database Consultant - Volunteer)

Australian Koala Foundation, Brisbane; Brisbane - Jun 2024 - Sep 2024

Led system analysis and requirements gathering to architect a PostgreSQL/PostGIS geospatial model for 30 years of legacy research data. Established the technical foundation for transitioning disparate spreadsheets into a unified, searchable system.

Stack: PostgreSQL, PostGIS, Docker, Python, SQL, Psql

Software Developer (Full Stack)

Tier1 Technologies; Seville, Spain; Mar 2021 - Feb 2024

Developed modular Java and Spring features for enterprise ERP and Retail (Web/POS) platforms. I built custom libraries for hardware I/O and third-party API integrations while handling frontend development using JavaFX for POS systems and JSP/Vaadin for web platforms. I also maintained MuleSoft (ESB) workflows and GitLab CI/CD pipelines for our development environments.

Stack: Java (Spring), JavaScript (Vaadin/JSP), JavaFX, REST, ESB (MuleSoft), Git, GitLab CI/CD.

Clinical Scientist (Biotech Career)

NHS (UK) | IVI RMA Global (Spain); 2016 - 2018

Led the nationwide rollout of a biometric digital chain of custody system for IVI RMA Global (world’s largest IVF group), upgrading security across 7 flagship clinics and exceeding regulatory standards.

Safeguarded high-stakes genetic material (embryos/gametes) through time-critical laboratory workflows while providing compassionate, clear updates to patients throughout their journey.