In 2015, he concluded his karting career in the KF class of the South Garda Winter Cup, where he finished 11th.

For 2018, Zendeli moved to the US Racing-CHRS team, partnering David Schumacher, Mick Wishofer and Tom Beckhäuser, for a year that would prove to be his breakout.

[19][20] He dominated the season by taking eight pole positions of a possible 14, winning 10 races out of 21 and finishing over 100 points ahead of nearest rival Liam Lawson.

[21][22] Zendeli progressed to Formula 3 in 2019, continuing with Charouz and alongside Fabio Scherer and Raoul Hyman.

[31] In Formula 3, Zendeli signed for Trident Racing to partner David Beckmann and Olli Caldwell in the 2020 season.

[34] He scored his first Formula 3 podium finish at the rain-shortened first race of the second Red Bull Ring round.

The German made a brilliant start from sixth, soaring to second on the first lap and nearly snatching the lead from the Frederik Vesti.

[43] He remained in the lead for seven laps and later fought with Jake Hughes but Zendeli would fall to fourth place at the finish.

[46][47] Zendeli returned to Charouz Racing System for a cameo appearance for the 2022 Barcelona Formula 3 round, taking over David Schumacher's seat.

[51] In December 2020 it was announced that Zendeli would graduate to the FIA Formula 2 Championship for the 2021 season, driving for MP Motorsport alongside Richard Verschoor.

That saw him line up for Sprint Race 2, and he was set for points when Christian Lundgaard made contact with his rear-right tyre, causing the German a puncture and his retirement.

[53] In Monaco, Zendeli qualified in 17th, and in the second sprint race he would finish in seventh, scoring points due to others' misfortune.

[54] In Baku, Zendeli had another incident in the second sprint but rescued a point with tenth in the feature race.

[59] Due to financial reasons Zendeli left the team in early November and was replaced by Clément Novalak.

[61] In 2022, Zendeli made a cameo deputisation at Spa-Francorchamps, replacing the banned Olli Caldwell at Campos Racing, which was his first F2 round since he left MP Motorsport in 2021.

[65] Zendeli returned to racing in 2023, and would contest the 2023 USF Pro 2000 Championship with TJ Speed Motorsports.

His father Jauni, who had fled from North Macedonia before settling in Germany, founded a drywall works company in Bochum.