During the work in the big CRM product company "Creatio" I made a great influence on the development of their products. A lot of core-features that were done by me are still working and thousands of clients use them every day. I visited a lot of "Creatio" internal conferences and was an initiator for a few of them. I still have the "Creatio" advanced developer license(this license needs to be approved every 2 years). Also, I worked on a big and successful ERP/CRM system from scratch. I worked there from the first day till the few releases were done. So, I was a participant in every development stage. There was a lot of platform and business features. During the work, I learned a lot of medical specifications and terminology that helped me to understand and implement business requirements.