Donovan Theseira

Senior Software Engineer @Astrion

San Diego, CA, US

Architecting and developing a User and Organization Control Panel using React, which will serve the more than users on the NASA GLOBE website with features including search, filtering, and dynamic routing- Built a robust API integration layer using SWR, Axios, and custom hooks to seamlessly communicate between the React frontend and the Java REST services, with built-in unit testing to validate this functionality- Designed and implemented a secure RESTful API enabling CRUD operations for user and organization management- Optimized API performance by implementing Elasticsearch indexing and aggregation queries, enabling dynamic filtering capabilities- Modernized Freemarker form field templates to React based components, which improved maintainability and the user experience for thousands- Led a team of 5 through a complex portal system upgrade, coordinating resources and timelines to deliver an on-scheduled solution to NASA- Drove development of standardized code review processes with senior team members, reducing deployment overhead, accelerating testing cycles, and promoting knowledge sharing through smaller, more reviewable pull requests- Spearheaded a security enhancement initiative, implementing CSRF protection and RBAC authorization across Java MVC Commands and JSP pages- Engineered an internal custom Elasticsearch library in Java, helping to reduce search and load times across the GLOBE website by as much as 25%- Implemented Constant Contact API integration into the City of Burbank website, which included creating a system that automatically refreshes auth tokens when necessary using cron jobs- Collaborated with the DevOps team to implement our Jenkins CI/CD workflows, reducing build failures, and maintain consistent deployment quality.