You want to develop a comparison website. Basically, these sites have a large database and flexible search. It enables users to compare prices, characteristics, tariffs, stores, etc. There are many cases of using projects for comparison, but they all have the following functions: convenient search, flexible filters, large database, payment system and dashboard. In such websites, it is very important to develop the right architecture. Big data can significantly slow down the speed. Thus, we recommend using flexible and powerful technologies that will allow you to easily scale the project. For example, our project Mircen analyzes about 10 million items every hour. It takes a few minutes. The correct architecture and optimized code allowed to achieve such a high speed. This is a complex type of project requiring attention to detail.