My many years of experience in creating software systems of varying complexity embodied in the software platform Phoenix, the author of which I am. The platform has gone through several generations (COM+/C++, EJB/Java, .Net Core/C#) and continues to evolve today.A distinctive feature of the platform, in addition to the unification of the structure of projects, is the generation of applications based on a class model or UML. Projects have been successfully completed on the basis of different generations of Phoenix:- Ensuring distribution , allocation and licensing of radio frequencies for the implementation of regulation of radio frequency resource of Ukraine (Ministry of Transport and Communications of Ukraine.)- Automated system for collecting and processing corporate industrial, economic and financial information of the Directorate for interaction with operators (Ukrtelecom).- Census 2001 OLAP (Department of Statistics, Ukraine).- Census 2001 (Department of Statistics, Ukraine).- Census 2001 Data Manager (Department of Statistics, Ukraine).- Census Moldova-2004" (Department of Statistics and Sociology of the Republic of Moldova).- OLTP system of data collection and processing for gas distribution operator (OdesaGaz, PoltavaGaz).- The pilot census of the population of Ukraine in 2019 (+ upgrade in 2021) (State Statistics Service of Ukraine).- ICS “International automatic Information Exchange” (State Tax Service of Ukraine).- аnd other projects...