Kat Choi Email & Phone Number

OBJECTIVE Work as a lead java architect/developer to utilize my strong system design and development skills in a high volume, real time, mission critical, web/application server environment. SUMMARY OF EXPERTISE• Expert in modernization of legacy application to distributed Java application, either through code conversion tool with refactoring, or total rewritten with common Java framework.• Specializing in design and build high volume(70 millions/day), real time, 24x7 mission critical server side Java framework and application.• Capable of design and implement server/client side reusable framework.• Strong core Java (13 years) and C (13 years) with multi-threading, server-side programming experience. Working knowledge with C++.• 13 years of Linux, 13 years of iSeries/AS400, 2 years of AIX, 1 year of OS2 and 2 years of Mainframe application development experience.• Strong OOD and OOP with design pattern skills in CORE Java; capable to design and implement very complex, real time, and high volume transactions system with multi-tiers, multi-platforms, multi-threads from ground-up. Hands on experience with UML.• Strong leadership in technology and personal development with great team building skills. • Strong Java application performance (GC) tuning knowledge. Hands on experience with tuning high CPU/IO/memory usage system.• Hands on experience in SOA, J2EE with WebLogic, TOMEE, WebSphere, JMS, EJB, Web Services, Servlets, XML, JSON, HTML and many other web related technologies.• Hands on experience with GUI development with Vaadin, GWT, jQuery, JavaScript and HTML.• Solid relational database design and access knowledge. Hands on experience in DB2, MySQL, JDBC, and SQL. Working knowledge with Mongo DB.• Strong server side development skills, with in-depth knowledge in various communication protocols: HTTP, TCP, SNA-LU6.2, X.25-ASNYC etc. Specialized on build communication servers.• Strong IP socket and SNA APPC, CPIC, CSL (Linux SNA) programming skills.

Listed skills include Java, Java Enterprise Edition, Web Services, Xml, and 16 others.