Because the time span is as long as 10 years, many friends who browsed this question at that time will feel very touched in retrospect.
There are many banking systems and links, and the people's bank of China, UnionPay, credit card, international remittance, securities, credit card and insurance are all in custody. But nothing more than their own systems, specific application systems and connections to various network systems. Our own system is mainly the core accounting system, with UnionPay inter-bank transfer access to various network systems; Each application system includes funds, credit cards and insurance. The scope of various application systems is constantly expanding, such as financial product systems, personal loan products and other innovative products, as well as electronic channel businesses such as precious metal gold, foreign exchange trading system, interbank lending system, mobile banking and online banking self-service equipment. Internal office, OA, asset management, communication software, etc. So all the languages you can hear are used in banks:
Needless to say, the banking system uses C language, java and javascript, as well as flex, Cobol, Small Talk, VB, R, Python, PHP and Swift. Various cutting-edge financial technologies are also widely used in banks, such as blockchain, artificial intelligence, speech recognition, DevOps, big data cloud computing, Docker container and so on.
Why? Because since the millennium bug, various foreign information technologies have found their place in banks. Banks also have various database technologies and talents. If it weren't for PBOC's safety supervision of banks, bank innovations would emerge one after another, and Alipay might be different now.