Motivations for choosing microservice architecture

This thesis is devoted to uncovering the motives behind the choice of microservice architecture for any project as the preferred architecture in today's IT world. The thesis includes a broad literature search containing a sufficient introduction to the studied issue, a description of the most used architectures and a detailed analysis of the characteristics of microservice architecture. The research is introduced by a structured comparison of all the mentioned architectures (SOA, Monolithic Architecture, EDA and Layered Architecture) with microservice architecture. Three qualitative interviews were conducted with carefully selected industry experts and then processed using thematic analysis to obtain data for further research. As a result of the research, the findings of the thematic analysis and the literature search are compared with the differences between the two sources discussed and explained. Within the result, the thesis talks about the transition from monolithic to microservice architecture, as a frequent step in order to increase the sustainability and usability of modern applications. Furthermore, the strengths of the microservice architecture, which are the possibility of agile and rapid development, flexibility in deployment and the possibility of total optimization of the resources used. The main risks identified at the end of the analysis are design, without which the microservice architecture may lose its effectiveness, or the difficulty of integrating a multitude of heterogeneous services. Finally, the identified differences between the literature search and the interviews are the difficulty of navigating the code and its complexity, the difficulty of creating sustainable systems, and the complexity of testing and deployment. These differences are explained by the different environments, i.e., the interviews come from a professional environment, while the literature contains a wider range of information generated even in amateur settings.