Dragan Misita delivered a platform upgrade and security-focused refactor for the GovAlta/adsp-monorepo, focusing on improving stability, maintainability, and security. He upgraded the adsp-service-spring-sdk to Spring Boot 3.4.2 and Java 17, ensuring alignment between runtime and build tooling. Dragan refactored the AccessJwtGrantedAuthoritiesConverter to use safer Java types for JWT claims, enhancing type safety in authorization handling. He also updated CI/CD pipelines to support Java 17, reducing technical debt and preparing the codebase for future enhancements. His work demonstrated depth in Java, Spring Boot, and CI/CD, addressing both immediate security needs and long-term maintainability.