Iwlijew made his first international appearance at the 2018 Junior World Championships in Tomaszów Mazowiecki . There he was tenth in the all-around competition and won the silver medal with the relay. He made his debut in the World Cup at the beginning of the 2018/19 season in Calgary , finishing 41st over 1000m and 17th over 500m. At the following World Cup in Salt Lake City , he achieved his first podium finish in the World Cup with third place in the relay. The relay won the bronze medal at the 2019 European Championships in Dordrecht and the 2019 Junior World Championships in Montreal . At the beginning of March 2019, he won the bronze medal over 500 m and the silver medal with the relay at the Winter Universiade in Krasnoyarsk . The following year he was sixth at the Junior World Championships in Bormio over 1000 m and won the silver medal with the relay.
Personal bests
500 m 40.480 sec. (installed on January 31, 2020 in Bormio)
1000 m 1: 25.700 min. (installed on December 24, 2017 in Kolomna)
1500 m 2: 13.728 min. (installed on December 22, 2017 in Kolomna)
3000 m 5: 10.940 min. (installed on December 29, 2018 in Kolomna)