[3] Making his ISU Junior Grand Prix (JGP) debut, he placed seventh in Linz, Austria, in September 2012.

[4] In November, he placed fifth at the 2014 CS Volvo Open Cup, an ISU Challenger Series event and his first senior international.

In December he skated his third Challenger event of the season at the 2017 CS Golden Spin of Zagreb where he placed sixth.

In September Lazukin won the bronze medal at the 2018 CS Lombardia Trophy with a personal best score of 243.45 points.

At the 2019 Russian Championships, he debuted a new free skate to Pyotr Ilyich Tchaikovsky's Romeo and Juliet, finishing in fourth place overall.

[9][10] Beginning the season on the Challenger series, Lazukin placed twelfth at Lombardia and seventh at the Finlandia Trophy.

At his first Grand Prix assignment, Lazukin was sixth in the short program after a rough landing on his quad Lutz attempt and having to put a hand down on his triple Axel.