Before joining Siemens, my experience was limited to jQuery and Backbone.js, technologies that often resulted in complex, tightly-coupled frontend architectures. At Siemens, the team had adopted AngularJS, one of the earliest UI frameworks to propose a component-based model close to modern frontend development practices. Vitaly mentored me through this transition, teaching me how to build software in a corporate environment. Over two years, he led the development of ELVIS, a web application for real-time data monitoring, along with a mobile application offering limited functionality. Working alongside him helped me grow as an engineer.