Tomas Kazragis discusses the challenges of fast growth at tech companies. Key challenges include handling high volumes of traffic with thousands of servers and meeting response times of under 20 milliseconds. The company has grown from 50 employees in 2015 to over 450 currently across 7 data centers globally. They focus on attracting and developing talent through internal academies and programs that provide employees freedom and accountability at work. This includes freedom to choose projects, learn new skills, and organize work, all within a culture that values team results, ownership, and being open and dynamic.