[5][6] Liendo was born in Toronto, Ontario to Trinidadian parents, and spent his early childhood in Trinidad and Tobago, beginning to learn to swim there.

[8] At the 2017 Canadian junior championships, Liendo set an age group record in the 100 m butterfly, swimming it in 54.76 seconds, which he would later cite as the moment he knew he could go far in the sport.

[14] As part of the 2021 Canadian Olympic swimming trials in Toronto, Liendo broke the national record in the 100 m butterfly event, with a time of 51.40.

He was part of the Canadian team in the 4x100 m freestyle relay that unexpectedly qualified to the event final and the finished in fourth place, 0.60 seconds back of a bronze medal.

"[2] Liendo began the 2022 World Aquatics Championships as part of the Canadian team for the 4×100 m freestyle relay, where they finished in sixth place.

[19] In the event final, Liendo led at the halfway mark, finishing third to take the bronze medal in a close contest, with only 0.07 seconds separating him and silver medalist Maxime Grousset of France.

[21] The following day, Liendo competed in three finals in the evening session, finishing fifth in the 50 m freestyle before winning his second bronze medal in the 100 m butterfly.

"[22] Named to Canada's team for the 2022 Commonwealth Games, Liendo began the first day of the championships by winning the bronze medal in the mixed 4×100 m freestyle relay, and qualifying to the event final of the 50 m butterfly by placing ninth in the heats and fourth in the semi-finals.

[28] Liendo started his 2023 season by competing at the 2023 SEC Swimming and Diving Championships, where he won the men's 100-yard butterfly title in a time of 44.11 and placed second in both the 50- and 100-yard freestyles, going 18.39 and 42.24, respectively.

[30] In his first day of competition at the 2023 World Aquatics Championships in Budapest, Liendo was part of the Canadian men's fifth-place 4×100 m freestyle relay team, and came fifteenth in the semi-finals of the 50 m butterfly.

[33] The following day he won silver in the 100 m butterfly final with a new national record time of 50.34, and was part of a fourth-place mixed 4×100 freestyle relay team.