Haoshui Zhang

Hong Kong Hong Kong

Linux and Virtualisation System Programmer at Guosen Securities

Technology / Software / Internet

Work as a system programmer at the Merchant bank of China in Shenzhen, which is a city near to Hong Kong. Now, maintaining the credit card system which holds the most credit cards all around the world. This credit card system is running on z/OS as the operating system, using CICS as the OLTP middle-ware, and VSAM as the file system. My work is focus on maintaining all the online and batch jobs in the production environment, and helping developer to diagnose bugs and to tune jobs which run too long or consume too much resources.