Székely made her senior international debut at the 2019 Doha World Cup where she competed on the uneven bars and balance beam, but she did not qualify for the event finals. She then competed at the 2019 European Championships where she finished fifty-ninth in the all-around during the qualification round. At the 2019 Koper World Cup, she finished fourth on the uneven bars. She was the selected to represent Hungary at the 2019 European Games, and she qualified for the all-around final where she finished seventeenth.