Schindler is a two-time major event quarter-finalist, reaching the last eight at the World Grand Prix and UK Open, both in 2023.

[3] Schindler qualified for the 2018 PDC World Darts Championship and faced Simon Whitlock in the first round, losing 3–1 in sets.

Later on in the year he was the runner-up at the 2018 PDC World Youth Championship, losing to Dimitri Van den Bergh 6–3 in the final.

[3] Schindler qualified for the 2018 Grand Slam of Darts, and was drawn into Group D with Stephen Bunting, Mensur Suljović and Scott Mitchell.

Alongside Hopp he again represented Germany at the 2019 PDC World Cup of Darts, losing to Belgium in the second round.

[3] Schindler played at the 2019 PDC World Youth Championship, making it to the quarter-finals of the event, losing to Ryan Meikle.

[3] As the runner-up at the 2018 PDC World Youth Championship he qualified for the 2019 Grand Slam of Darts, being drawn in the Group H with Michael Smith, Glen Durrant and Nathan Aspinall.

Schindler made his final appearance at the 2020 PDC World Youth Championship, again reaching the quarter-finals, where he lost to the eventual champion, Bradley Brooks.

Schindler achieved victory over Joe Cullen 6–3, before defeating Richard Veenstra 6–1, Danny Noppert 6–5, in a deciding leg, and Chris Dobey 7–3 on his way to final.

[8] A week later, Schindler won the 2024 Swiss Darts Trophy, defeating Ryan Searle 8–7 in the final.