Aldemir first played poker while at a 5️⃣ friend's house on New Year's Eve in 2006. He began by playing freerolls on PokerStars and had his first recorded 5️⃣ live cash in January 2012 in a €200 tournament held in Berlin.[2] While playing a tournament in Rozvadov, Czech Republic 5️⃣ in 2013, Aldemir allowed another player to use his computer to send money on PokerStars and had his account locked 5️⃣ on the site for the next four years. He moved to Vienna soon after to study psychology in university.[3]

Prior to 5️⃣ the Main Event, Aldemir's best career cash was forR$2.1 million when he finished in third place in theR$111,111 One Drop 5️⃣ High Roller at the 2024 World Series of Poker.[4] That same year, he finished runner-up to Adrian Mateos in the 5️⃣ Summer Solstice event.[5]

Aldemir won a Triton high roller in the Philippines in 2024 forR$1.3 million.[6] In 2024, he finished third 5️⃣ in the PokerStars Caribbean Adventure forR$481,000.[7] He also won an event at the 2024 U.S. Poker Open.[8]

At the 2024 Main 5️⃣ Event, Aldemir began the final table with the chip lead and went heads-up against George Holmes. On the 223rd hand 5️⃣ of the final table, Holmes moved all in with K♣ Q♠ on a board of 10♥ 7♠ 2♥ K♠ 9♣ 5️⃣ and Aldemir called with 10♦ 7♦ for two pair to win the tournament.[9] The victory moved him pastR$20 million in 5️⃣ career earnings and into fourth place on Germany's all-time money list.[10]