Chang Sau Sheong has more than 12 years experience in software application development and has spent much of his career in Web and Internet-based applications. He has a wide range of experience in banking payment-related as well as Internet-based e-commerce software. Currently he is the Director of Software Development of a 50+ strong software development team in Welcome Real-time, a multi-national payment/loyalty software company based in France and Singapore.

Sau Sheong frequently writes for technical magazines and journals including Java Report, Java World, and Dr. Dobb's Journal. He also contributes to open-source projects in various technologies including smart cards, Ruby, and Java. His interests revolve mainly around technology and software development. He has done programming in Java/Java EE, C, C++, PHP, Python, Perl, Smalltalk, Erlang, Ruby/Ruby on Rails, various smart card platforms, and also worked on various databases. He has a wide range of experience in banking payment-related as well as Internet-based e-commerce software.

Sau Sheong hails from tropical Malaysia but has spent most of his adult and working life in sunny Singapore, where he shares his spare time enthusiastically writing software and equally playing Nintendo Wii with his wife and son. He has a Bachelor's degree in Computer Engineering, a Master's degree in Commercial Law, and is a certified international arbitrator.