Develops RESTful web services in Java and Spring MVC. Tech stack includes: Memcached, JMS, Gradle, MySQL, PostgreSQLCreated service endpoint for caching, listening to JMS message to make phone call a blocking process for each user, which prevent slow balance deduction and concurrent call. Include metrics mechanism.Improve credit purchasing flow to include edge case of service call.

Build REST services server and client(JSON format) , PCI compliant level 2 service( integrate Mogl Offers), client authorization/card registration / transaction callback to CitySearch point system. Data mining with pig script for similar nearby business data in CitySearch.com Java Builder, Singleton, Immutable Objects, Exception and other best pattern / practices for fitting situation Java 8 Lambda function programming (entry level) Used best web programming practice using Spring MVC : PRG, AOP, PFG, DAO Unit test DAOs, controllers, services and others using Mockito, JUnit with test coverage at about 50% Best practice on building and branching development, test and production environments with Git, Jenkins and Nexus.

Used / Config Jenkins, Git for build release cycleBuilt Flum feed / Hbase / Hive / Thrift for Java and PHP clientsChose and used CloudStack for hybrid cloud

PHP, Drupal web application backend developmentBuild a Spring / Hibernate WebApp to utilize Salesforce reports for further analysis

Assist the development team to convert existing SQL/.NET/Windows web service architecture to Hadoop/MongoDB/Java/Linux architecture.

QA, Test Plan(case) writing, desktop software customization