Using Java, Spring Boot and shell script, refactored legacy computing components to dynamically load different versions of NLP research libraries (includes Java and native libraries) based on configuration.Deployed software stack to Azure using Docker, Kubernetes, Helm, and various Azure services.Enhanced an internal library providing MyBatis support to Spring Data, which in turn solved multiple database transaction related issues when working with legacy code.Troubleshot complex integration issues among different NLP components, which includes Java and Linux native libraries, third party service, etc., using AspectJ, VisualVM, Memory Analyzer etc.

Developed new features from frontend to backend using JavaEE/Spring/JPA/JMS/Oracle/AngularJS etc.Added bitcoin payment option which will incur complex payment scenarios.Integrated multiple 3rd party payment services into payment system to achieve better success rates and lower processing fees.Designed and implemented history and audit data storage using Cassandra. The data is handled to multiple departments to provide enhanced fraud detection and operation history.Provided on-call production support, prevented or resolved several emergency issues.

Worked on MoneyCloud platform, providing loyalty program, payment system, adivertisements and BI solutions.Designed, implemented, tested and maintained object oriented RESTful web service, which is highly scalable and able to handle high volume of requests.Cooperated with designers, frontend developers and other departments to fulfill requirement. Enhanced the backend application using difference techniques for performance and functionality.Set up, managed and secured Linux servers.Technologies: JavaEE, REST, Spring, PostgreSQL, Hibernate, MongoDB, Redis, Msg Queue, Linux, etc.

Designed and implemented a web-based management system for graduate paper submission.Participated in requirement analysis, system design and coding, testing and maintenance.Designed the database using MySQL.Implemented a web-based system using Java web development with Struts/Hibernate/Spring frameworks.Technologies: Java, HTTP, XML, JavaScript, AJAX, JSP, Servlet, Struts 2, Hibernate, SQL, email service.