Axiom made his WWE debut as A-Kid, alongside fellow wrestler Carlos Romo on April 20, 2017, where they were defeated by Gallus (Mark Coffey and Wolfgang) during NXT UK tapings. On October 17, 2019, A-Kid was announced as having signed for the NXT UK brand. He made his singles debut on October 31, defeating Kassius Ohno. On November 26, 2020, A-Kid became the first ever NXT UK Heritage Cup Champion by defeating Trent Seven in the finals. A-Kid lost the NXT UK Heritage Cup on the October 28, 2021 edition of NXT UK, to Noam Dar.
On July 5, 2022, his name was changed to Axiom and he debuted an intelligent masked superhero-esque character. He would make his redebut on the July 19 episode of NXT 2.0, defeating Dante Chen. He then entered a best-of-three series against Nathan Frazer, where he won the first match on the September 6 episode of NXT 2.0, but lost the other two matches on September 14 and October 11 episodes of NXT. At NXT Deadline, Axiom failed to win the Iron Survivor Challenge. Axiom then entered a brief rivalry with Carmelo Hayes, where he lost to him on the December 13 episode of NXT, but defeated Trick Williams on the January 17 episode of NXT. At NXT Stand and Deliver, Axiom failed to win the NXT North American Championship and lost again on the following episode of NXT to Wes Lee. Axiom soon entered a rivalry with Scrypts where he defeated him on the May 2 episode of NXT. Shortly afterward, the two started teaming after Scrypts turned face. On the July 18 edition of NXT, Scrypts turned on Axiom and aligned himself with the debuting Bronco Nima and Lucien Price during their scheduled match.
Axiom made his SmackDown debut on the November 17 episode, losing to Dragon Lee. Around this time, Axiom formed a tag team partnership with Nathan Frazer. In early 2024, Axiom and Frazer participated in the NXT Tag Team Championship eliminator tournament, defeating No Quarter Catch Crew (Charlie Dempsey and Myles Borne) in the first round and Latino World Order (Joaquin Wilde and Cruz Del Toro) and The O.C. (Luke Gallows and Karl Anderson) in a triple threat tag team match in the finals to face NXT Tag Team Champions Baron Corbin and Bron Breakker for the titles at NXT Stand and Deliver, but failed to win the match. In a rematch on the following episode of NXT, Frazer and Axiom defeated Corbin and Breakker to become the new NXT Tag Team Champions. After the match, The Final Testament's Authors of Pain returned to NXT and attacked Frazer and Axiom. During week two of Spring Breakin', Frazer and Axiom successfully defended their titles against AOP after interference from New Catch Republic (Pete Dunne and Tyler Bate). On the May 21 episode of NXT, Frazer and Axiom retained their titles against The D’Angelo Family (Luca Crusafino and Channing “Stacks” Lorenzo). After the match, they were attacked by The O.C. (Luke Gallows and Karl Anderson). At NXT Battleground, Frazer and Axiom retained their titles against The O.C. After multiple successful title defenses, on the August 13 episode of NXT, Axiom and Frazer lost the titles to Chase University's Andre Chase and Ridge Holland, ending their reign at 126 days. The pair regained the titles in a rematch nineteen days later at NXT No Mercy to become two-time champions.