Hello, Mishka, you wrote: M> From zero the online shop is written. Standard business processes - search, purchase, goods layout, registration. It is expected hardly more than users. A database (Cassandra, DynamoDB, etc. In general arranged, not relational), the server on Java (rest, web), clients - web (JS, jQuery, etc.), (Java), iOS (Objective-C). M> How many in man-days in your judgement the side occupies put for technologies?" Pioneer "the version - for two months. Beauty of design and riches of possibilities for flight of commercial thought like" and here know, here at us it is some warehouses in a city, some cities, and still are hierarchy of dealers with accumulative discounts and integration with mail , and also automatic calculation of package for the goods and weight of sendings "it will not differ. Still, I do not understand, what flow of orders should be that the server of a DB with 32 and PCIE-SSD could not process it. All this elasticity of that people want to be launched on a shit because on good iron to them credits do not give. M> iOS (Objective-C). After - write on Xamarin.