• Analyze specifications and requirements, study and propose solutions.• Design system architecture of new generation product based on Control Plane and User Plane Separation.• Design solution for fundamental functions of product.• Break down requirements into user stories and tasks, efforts estimation and task assignment.• Resolve critical issues and puzzles of product and provide solution consultation and technical aids.• In charge of code review and approval of all commits of product.• Implemented core functions of new generation product.• Research Firewall Traversal Tunnel for IKE and IPSec. Specification analysis, proposal solutions, design and implement functions.• Develop prototype applying ODBC with Postgresql.• Integrated static code analysis tool CPPCHECK into project.

• Research and found a solution for automatic adaption between dual configurations of Windows RNDIS and MAC/Linux ECM, implemented core function of the solution.

• Develop video function for new generation product.• Linux platform development. Developed a series of fundamental aspects for new generation product.• Design and implement upgrade functions for new product based on dual-system architecture.• Optimize system boot time, proposed a dependence related, high parallel initializing solution, which effectively reduced system booting time.• Analyze and improve system high reboot frequency issue, proposed a pertinent solution, significantly improved the issue.• Maintain R260 product. Solved various critical problems and difficult puzzles, made system much more stable.

• Optimize protocol identification engine. Located bottleneck of engine and promoted engine performance by applying Aho-Corasick algorithm inside engine.• Platform migration. Migrated product to x86 architecture from MIPS architecture.• Code refactoring. Improving code quality, promoting program performance, reorganizing source code.• Maintain product source code. Locate, analyze and fix bugs reported by testers and customer, develop features according to customer requirement.