Staff software engineer. Ivan works at Kontur for 17 years, during which time he was a team lead in 5 teams. He develops web services for business and likes to puzzle out complex domains and solve tricky engineering problems. As a student he participated in ACM, and quite successfully: his team ranked 9th on NEERC in 2000. Now in his free time he participates in online contests, such as CodinGame, IPSC, ICFP Contest.