On January 29, 2021, it was reported that Teoman had signed a contract with WWE, where he was announced to perform on the NXT UK brand. A series of vignettes hyping his debut began on the February 25 episode of NXT UK. He made his debut on the March 11 episode of NXT UK, defeating Danny Jones. On the June 24 episode of NXT UK, Teoman defeated Oliver Carter and was joined by Rohan Raja, who stomped on Carter and aligned himself with Teoman. On the July 15 episode of NXT UK, he teamed with Raja to defeat Carter and Ashton Smith in a tag team match. In September, Teoman competed in a tournament to determine the number one contender to the NXT UK Heritage Cup, defeating Nathan Frazer in the first round but lost to Wolfgang in the semifinals. He started a feud with Gallus on the October 28 episode of NXT UK, when Raja lost to Mark Coffey and both of them attacked him and Wolfgang. On the November 18 episode of NXT UK, Teoman and Raja defeated them in a tag team match, after a distraction from Charlie Dempsey attacking Joe Coffey. On the December 2 episode of NXT UK, Raja (with Teoman on the phone) accepted Dempsey into their group, officially dubbed Die Familie.
On the January 27, 2022 episode of NXT UK, Die Familie defeated Gallus in a six-man tag team match. Afterwards, Nathan Frazer questioned Teoman on why he was keeping Rohan Raja and Charlie Dempsey to protect him. The following week, they attacked Frazer in the parking lot, leading to a match on the February 10 episode of NXT UK, where Frazer defeated Teoman. On the April 14 episode of NXT UK, Teoman defeated A-Kid. On the May 19 episode of NXT UK, Teoman and Raja defeated Dave Mastiff and Jack Starz in a tag team title eliminator match, and were added into the NXT UK Tag Team Championship match involving the champions Moustache Mountain (Trent Seven and Tyler Bate) and the team of Ashton Smith and Oliver Carter. On the June 2 episode of NXT UK, they failed to win the titles when Smith pinned Seven. On the June 23 episode of NXT UK, Die Familie received another shot at the tag titles after Smith and Carter vacated them, but failed to win a fatal four-way elimination match after Raja was pinned by eventual winners Brooks Jensen and Josh Briggs.
On August 18, 2022, Teoman was released from his WWE contract.