Preslav is a Senior Software Engineer with experience in both big tech companies like Uber and high-growth startups. Throughout his career, he's dealt with various systems such as low-level electronics, blockchain systems as well as large-scale web applications, serving millions of users.

He has also been lead programming courses to more than 25,000 students both online and onsite on various programming and computer science topics across multiple countries such as Bulgaria, The Philippines, Serbia, Singapore and more.