A professional since 2015,[3] Windle faced Tommy Frank for the vacant British flyweight title at Ponds Forge in Sheffield on 18 September 2021, losing via unanimous decision.
[4][5] In his next fight, he dropped down a weight division to claim the vacant Commonwealth light-flyweight title by stopping previously unbeaten South African boxer Siphelele Myeza in the 11th round at Premier Banqueting Suite in Burmantofts, Leeds, on 8 October 2022.
[6][7] Windle challenged Commonwealth flyweight champion Connor Butler at Liverpool Olympia on 9 June 2023, with the vacant European title also on the line.
[8] Dropping back down to light-flyweight, he made the first defense of his Commonwealth title against Craig Derbyshire at Lions Centre in George Town, Cayman Islands, on 8 December 2023.
Windle took heavy blows throughout the contest and lost when his corner halted the fight at the end of round five to avoid him sustaining further damage.