Is a professional Sudoku, Solitaire, and Mahjong player, software engineer, and co-founder of Forty Media—the studio behind Sudokus.io, SolitaireX.io, and TheMahjong.io. With over 10 years of experience in tech and gaming, he combines competitive gameplay expertise with deep technical skills. A self-described technical nerd, Stoyan has also been an educator for more than 7 years, mentoring developers and sharing knowledge. Explore his work on GitHub and connect with him on LinkedIn.