Adrian Castillo Email & Phone Number

United States

- Transformed legacy mainframe applications into batch jobs, APIs, and UIs, using Angular, Spring Boot, Spring Batch, GCP, Docker, and Kubernetes, resulting in a 65% reduction in application downtime- Created an authentication library, which was integrated across all applications, reducing code redundancy by 33%, improving security compliance, and enhancing maintainability and reliability- Optimized batch job processes by transitioning from native SQL to the Hibernate framework, enhancing scalability and boosting performance by 54%- Directed the integration of web applications with identity management systems such as Okta, resulting in a 71% reduction in authentication-related support tickets and increased user satisfaction

United States

- Enhanced data processing efficiency by developing and maintaining batch jobs using Spring Batch, ensuring seamless execution and timely delivery of results, which improved on-time data delivery by 28%- Re-engineered a batch job using Spring Batch for a warehouse scheduling tool, ensuring employees were accurately paid during time changes for daylight savings, resolving payroll discrepancies- Architected and developed a warehouse scheduling web application using Spring Boot and Angular, integrating an Oracle database and AG Grid to improve on time dispatching by 42%- Collaborated with external teams to deliver effective solutions, resolve technical challenges, and meticulously document specifications, sparking continuous improvement and innovation efforts

United States

- Built complex data processing workflows using Airflow DAGs, integrating GCP services like BigQuery, Dataflow, and Dataproc, which efficiently processed over 100TB of data daily and reduced processing time by 46%- Implemented a data pipeline on GCP using Cloud Composer to execute and manage DAGs, automating workflows and significantly improving efficiency- Maintained comprehensive team documentation using Confluence, covering development tools, environment setup, Git workflows, and CI/CD processes

United States

- Led a team of interns in developing an inventory management application using Angular, Spring Boot, and an Oracle database, which improved workflow efficiency and expanded support for additional devices- Developed and implemented a CI/CD pipeline that ensured a 90% unit test coverage and streamlined the deployment process, resulting in a 55% increase in deployment frequency and faster release cycles- Implemented a real-time monitoring solution using Datadog and set up automated Slack alerts for anomalies, improving system reliability and decreasing average resolution time