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5+ years of commercial experience of Full Stack Developer, with large projects in which I have successfully contributed to their development. My main activities are developing both web applications and client-server applications on the .NET. I created scalable and flexible solutions using the best practices and principles of development. My experience also includes optimization of code, database queries and reduction of their number, introduction of caching to accelerate the work of services, websites.Worked with various technologies and tools, the main ones are ASP.NET Core (MVC), Winforms, EF Core, Linq, SignalR and others. I used REST API, WebSocket, gRPC for data exchange. Also I have experience in frontend development of HTML, CSS, JavaScript (TypeScript), Angular, jQuery, Bootstrap. Worked with databases SQL, MySQL, PostgreSQL, T-SQL (triggers, stored procedures, user functions). In general, my experience in application development on . NET allows me to create high quality and efficient solutions that meet business requirements. I integrated various payment systems including Binance, Perfect Money, FreeKassa, FKWallet, BetaTransfer and Payport. I have experience in developing Chrome Extensions. Used Puppeteer, Playwright to automate various tasks. Worked on creating proxy servers.In the development process, I used design patterns and strategies such as DDD, MVC, Bounded context and others. I also used the principles of SOLID, DRY, KISS, YAGNI to create clean and supported code.In my work I actively use version control tools such as Git. He made decisions in the construction of architecture of projects, taking into account business requirements, possible nuances, identified problems and ways of their solution.In my experience, I have successfully implemented the use of multi-dataset technology from the procedure together with EF Core. This allowed to optimize and increase the performance of the application by obtaining multiple datasets from the repository in a single request. This approach reduced database queries and improved the efficiency of the application by 30%. I also worked on accelerating the process of putting big data streams into the system. As a result of my actions, the process time was reduced from 46 minutes to 1 minute and 40 seconds with the same data. Thus, the module was accelerated by 96%.Examples of realized projects: market place of children’s camps, personal account of the customer, Unity simulators, automated parsers, proxy servers, financial platform for trade, various microservices and desktop programs.