Shimada joined Livin’ on the EDGE Company (later became livedoor) in 2001. He was a development engineer for the data center service and start-up business and later become the manager of data center and network related business. He became the president and representative director of DataHotel, a subsidiary of NHN Japan (later became LINE Corporation) that provides data center services and cloud services in 2012. Later, the company merged with Ecommerce service companies and became Techorus (later became NHN Techorus). As the president and representative director he developed Ecommerce and cloud related businesses. He then became the CTO of AltPlus, a company that develops social games and offshore developments. He drives “AltPlus Lab”, the research and development department that develops new technologies including blockchain technology, which has announced “communitio”, an in-house virtual currency service.