Served as tech lead for multiple frameworks and feature development for WebEx online buy flow(purchase.webex.com) using HTML5, JavaScript, and advanced CSS based on React and Redux.Worked closely with UX team to implement UI development for WebEx home page(webex.com).Responsible for building the web application for Cisco's next-generation enterprise collaboration platform, Cisco Webex Teams(teams.webex.com).Built new web client chat, audio, and video-related features including messaging system, 1-on-1 calls, scheduled meetings, and large-scaled meetings, which is the most important key feature of user engagement.Modularize the Cisco Webex Teams web client’s front-end components into a well-tested and dynamic React JS component library as SDK for open source developers.Wrote unit test and integration test for both web applications and open-sourced web client components. Worked with back-end teams to plan APIs for new features such as interoperability with Cisco WebEx, Locus, and WME server.Worked with the UX team to design the user interface and plan a better user experience.Participated in Cisco WebEx web application video and audio client platform design, implementation, testing, and release for the cloud.

Interfaced with a variety of renowned customers (IBM, Alibaba, Bank of China, Ping An Insurance, etc.) at both business and technical level to propose viable solutions for their customized video conferencing system based on RealPresence Media Suite. Fully evolved in the entire process of creating the customized video conferencing system for our clients, from project requirement analysis, preparation of feature specifications, architecture design, to technical document writing.Served as the tech lead for architecture design, code development and maintenance of RealPresence Media Suite SDK module and sample UI module for all platforms including iOS, Android, Mac OS, Windows and browsers. Frequently interacted with teams at lower layers of Call Control module and Media Processing module for feature development, maintenance, product upgrades and bug fix.Responsible for the unit test for the SDK and UI module, and worked with the QA team to design and complete feature test, function test and product integration test.Managed the version control and the compiler build servers using SVN and Jenkins.Managed the SDK implementation training and the UI design and maintenance for our offshore team and customers.

Responsible for the entire code design of the device drive on various types of boards, including analyzing the business requirement, evaluating the feasibility and effectiveness of the algorithm, writing design documents, interface control manual, and software feature documents.Implemented various modules of device drive such as Ethernet, file system, hardware abstraction layer, IIC, GPS and etc. in C, C++ and Assembly in Linux and VxWorks.Maintained and improved the code for protocol stack such as TCP/IP, FTP and SCTP in Linux and VxWorks.Created the test cases and test scripts and implemented the off-line test, verification test, unit test and integration test. Managed the periodical software upgrade of various base station equipment across China and provided technical support for problem analysis, fault location, bug solving, and so on.Designed the code framework and led the code refactoring based on object-orientated thinking to improve the effectiveness, portability and compatibility.

Participated in every step of SDLC process, including requirement gathering, technical design documents creation, unit testing and regression testing.Utilized TIBCO Designer Palettes HTTP, SOAP, XML, WSDL, FTP, File and Parse palettes to implement various interfaces such as IBM WebSphere MQ and establish connections between Mainframe Applications and MQ.Configured TIBCO SAP Adapter for publishing and subscribing the IDOCS, BAPI and RFC through secure FTP, MQ series and MFT as the transport protocol.Designed custom Java code to implement specified system activity such as calling EMS API.Implemented Error handling in Business Process and conduct unit testing, functional unit testing, integration testing and supported system testing.Utilized TIBCO Administrator to deploy TIBCO Components and the EARs into various environments.