Diego Ramirez Caballero

Managed and optimized large-scale production workloads on Google Kubernetes Engine (GKE) using Java 11/21 Enterprise, Spring AOP, and H2 in containerized environments. Led the decomposition of legacy monoliths into scalable microservices while mentoring engineers on architectural validation and robust automated testing.

Proactively drove a core refactoring initiative for a critical Java Enterprise service, delivering a 40% performance improvement by leveraging Java 11 multithreading capabilities.

Initiated and executed a comprehensive codebase refactor utilizing Java 11, Spring Boot, and MySQL, reducing system response times by 60% through data-access bottleneck elimination and single-responsibility endpoint design. Automated project traceability and enhanced team collaboration by architecting end-to-end integration flows between Azure Boards and Azure Repos.

Engineered backend services and custom portal modules on Liferay DXP (OSGi), leveraging Service Builder for persistence layers, custom MVC components, and dynamic entity extensions. Served as lead engineer overseeing technical specifications, system design, and integration architecture for multiple distributed healthcare platforms for Sanitas USA.

Architected and deployed a secure B2B integration framework utilizing Java, Spring Boot, and Oracle databases under an Enterprise Service Bus (ESB) pattern to connect the health insurance platform with external healthcare providers and contracted pharmacies. Successfully reduced pharmacy claim and customer processing times from 15 minutes down to 3 minutes, an 80% operational efficiency gain.

Completed a Professional Certificate Program in IT Project Management.

Completed a postgraduate degree in Information Systems Audit.

Earned a bachelor's degree in Systems Engineering.