Cloud computing became a routine tool for scientists in many domains. In order to speed up an achievement of scientific results a cloud service for execution of distributed applications was developed. It obliviates users from manually creating virtual cluster environment or using batch scheduler and allows them only to specify input parameters to perform their computations. This service, in turn, deploys virtual cluster, executes supplied job and uploads its results to user’s cloud storage. It consists of several components and implements flexible and modular architecture which allows to add on one side more applications and on another side various types of resources as a computational backends as well as to increase a utilization of cloud idle resources.