Preface These proceedings contain the papers accepted for the main program at the 11th Majorov International Conference on Software Engineering and Computer Systems (MICSECS 2019). Similarly to the previous editions, MICSECS 2019 features a peer-reviewing process in which every paper was reviewed in a rigorous but constructive way by three members of the Program Committee, supported by EasyChair. The last year, the number of applicants increased by 1.5 times, and as a result 173 applications were submitted. The authors represented 17 universities, 4 research centers, 4 commercial companies and one lyceum. The strict reviewing policies resulted in the acceptance of 61%. This translates into an acceptance of 32 full research papers and in an addition 38 papers were accepted for short presentation and have also been given space in these pro- ceedings. Established researchers and industry representatives were invited for keynote presentations at MICSECS 2019. We are grateful to the keynote speak- ers for their insightful talks. The program also included posters and position paper presentations to help attendees, especially younger researchers, to discuss preliminary ideas and promising PhD topics. We would like to express our grat- itude to various people who made MICSECS 2019 possible, and to the members of the Technical Program Committee for their valuable work in evaluating the submitted papers. March 23, 2020 Sergei Bykovskii Pavel Kustarev Dmitry Mouromtsev