Kevin A. O'Brien, PhD
Valerian worked with me for over 2 years in a project delivering an advanced analytics solution to a public safety client, under intense pressure to deliver to a demanding timeline and set of requirements. Valerian was a thoughtful, well-informed, and dedicated data engineer who took the time to understand the client's use-cases and real needs (beyond the 'headline' of the requirement), work through the development of the potential feature in close consultation with the client and the rest of the development team, and find the most efficient and current approach possible (within the constraints of the work) to solution the problem. His knowledge and expertise on data analytics engineering, infrastructure, pipelining, modelling, and UI/UX needs was both comprehensive and strong, as well as continuing to evolve as he sought to learn ever more to find the best solution. He worked well with both the rest of the delivery team and the client. Overall, I would recommend Valerian most highly to any other client or teams working in the data engineering and advance analytics space as an excellent, reliable, and conscientious worker addressing the key challenges for the use of data analytics today.