Supporting customers to take advantage of AWS services more efficiently. It's challenging but really enjoyable.In previous position, I had worked on keeping up site reliability of a part of big e-commerce service mainly, and also developed anything from front-end UI to back-end batch/stream system for running web services on demand.And formerly my main assignment was to expand and stabilize Hadoop and the related systems in that company.In addition, I had worked as a web application developer and also as a service producer in a variety of web services like web advertisement, recommendation and so on.And that, always interested in any challenging solution.