Java EE development for mid sized and large companies who have a multi-tier architecture. From an Internet perspective this usually means frond end systems like portals and content managements systems for presentation to the customer. The front end systems will call back end services to retrieve and store data. Back end system are responsible to store and retrieve the data mostly using a database. Apart from providing services to the front end system the back end system will usually also communicate with other systems of the same company or other companies. For internal communication an ESB (Enterprise Service Bus) will define the set of services available to all internal system. A smaller set of services may be exposed to the outside world through the company's API. Other companies may call this API. Depending on security requirements the front end systems may also need to use this API instead of directly calling the ESB. Dynasol is active in the design, development and management of Java based front and back end system, ESB's and API's with a focus on enabling a company's customers to do business through the Internet.