The main goal of this diploma thesis is a presentation of Autocommerce web project development. All used technologies are described. On the basis of the project we also present agile methodologies for software development which helps us to efficiently build the whole information system from the idea to the first version. Such methodologies are mostly used by startups, because they are perfect for building and testing products in a very short time & for adapting with the provided feedback from users. With process like that it's possible to achieve the optimal position on the market. Web application Autocommerce connects buyers and sellers of used & verified vehicles. All vehicles in the application are verified by specialized organisation. Like that users spend less time searching for a new vehicle because they know the condition of a vehicle. The thesis also describes business model of the application and how it collects analytics data inside the application. The end product of this diploma is a web application developed with Ruby on Rails framework. All major parts of an applications are described with short examples, as well as external tools and services that extend the functionalities and helps us develop it even further. They are important, because they connect all ends of the application into one information system.