• Working for warehouse management system team

• Full stack engineer using Java, JavaScript (Node.js, TypeScript), MySQL, SQL Server, RabbitMQ, AWS

• Built a prototype to create user segments based on criteria users choose in order to retarget campaigns; kept adding features and fixing bugs; Used PHP and MySQL for the backend and jQuery/AJAX for the front end; Sent out weekly report using data tracked by analytics service such as Mixpanel and Heap

• Optimized SQL by creating a composite index; sped up from 3-5 minutes to a few seconds

• Built a prototype to login to all the products at once, using the internal APIs; Used PHP with Symfony Framework, jQuery, 2-factor authentication

• Migrated code from PHP to HHVM

• Co-lead in project to develop $USD 2 million integrated authentication system for a department store company; interface with client, review design, manage a 15-member coding team and 2-member consulting team

• Worked in teams of 3-10 people to build enterprise infrastructures for more than 10 client companies; provided design, cost estimations, implementation and testing of operation systems, OS virtualization, directory services, databases, mailing systems, clustering systems, backup systems and monitoring systems; developed specialty in Windows OS servers; department was awarded for exceeding its revenue targets in 2012

• Solely executed 2-month project to build monitoring system for a client; system monitored network switches, routers, servers and storage; customized configuration according to client’s needs; resulted in successful implementation at expected cost

• Member of 20-person Microsoft product study group; attended monthly meetings; gave presentation about OS virtualization and case study based on a personal project experience in which several web servers were needed in a constrained space