[10] Under Szulczek's tenure, which included an eighth-place finish at the end of the 2022–23 campaign, Warta has overperformed and managed to avoid relegation twice despite their limited transfer activity and having one of if not the lowest reported club budget in Ekstraklasa.

[11][12] He has received praise for his work, which has been cited as a catalyst for other top-level Polish clubs to hire young managers with no playing experience beyond lower divisions or youth level, such as Adrian Siemieniec, Daniel Myśliwiec, Dawid Szwarga or Gonçalo Feio.

[13] On 18 April 2024, amid ongoing media reports linking him with Cracovia,[14] it was announced Szulczek would leave Warta at the end of his contract.

[9] He was unable to save Warta from relegation at the end of the 2023–24 season, as they lost 0–3 to Jagiellonia Białystok and were jumped in the standings by Korona Kielce following their away win over Lech Poznań on the last matchday.

[15] On 27 August 2024, Szulczek was appointed manager of I liga side Ruch Chorzów, a club he supported as a child,[16] on a deal until the end of June 2026.