I work in the core transactional functionality team. The main responsibilities are the development and optimization of the highload part of product. Completed some useful tasks during my job:- Implemented a distributed compilation mechanism that accelerated the build of the project by 6 times;- Used compile-time mechanisms during refactoring, which allowed to speed up the code by 41%;- With the help of gRPC, implemented the KeepAlive mechanism, which allowed to correctly distribute traffic between modules;- Accelerated database queries by 23% by changing the query structure;- Optimized the asynchronous code in the module, which reduced the complexity of the algorithm to O(1);- Implemented metrics into the project using Prometheus;- Implemented clang-tidy into the project, which allowed to reduce the review time and reduce the number of bugs.

Development of a video communication product characterized by increased security.In the course of work:- Accelerated the login of users on the server by 5 times, using multithreading;- Implemented support for the on/off microphone functionality for SIP/H323 users using a tone dial detector;- Added a mechanism for recording and saving the conference on the server. Supervised the development of relevant components in other teams;- Worked with image rendering: added display of user statuses in the conference, added the possibility of graphical customization of the conference.

Worked in the backend development team of an advertising system. During the work:- Conducted PR and participated in refactoring to improve the convenience of code maintenance.;- Engaged in test coverage using GTest, which reduced the number of bugs during refactoring;- Documented new features, APIs, and server processes;- I was engaged in the implementation of new functionality according to business requirements.