I can fully assure you of the fact that a good company that deals with quality app optimization does exist, and you can easily find it on this website https://www.griddynamics.com/solutio...etes-migration . It is engaged in their work, quite a long time and in that time have learned to optimize the things that really need to optimize, and they will also conduct a complete analysis of your application and tell you what you can do to better spread it in the shop.