Born in Valjevo, Rajevac started his career in local club Budućnost. For 2 seasons, he played 36 matches in the Serbian League West and scored 5 goals.
After Budućnost, Rajevac played for Jedinstvo Ub, in the first half of season 2011–12. He scored 8 goal on 15 matches playing for the team from Ub.
Rajevac moved to the club wirh same name, Jedinstvo, but from Užice for the second half of 2011–12 season. He played 11 matches and scored 2 goal until the end of season. The club was also promoted in Serbian First League for the next season.
Attacker returned in Valjevo, in football club of the "Krušik" industry in summer 2012. He made 14 appearances and scored 1 goal playing for FK Krušik. After 6 months he left to FK Kolubara.
On 9 matches in the Serbian First League, he scored 2 goals, against Čukarički, and Napredak. After the end of 2012–13 season, he left FK Kolubara.
In the 2013–14 season, Rajevac played for Železničar Lajkovac. He made 25 league appearances and scored 11 goals until the end of season.
After fuzion of 2 clubs from Valjevo, Budućnost, and Krušik, Rajevac returned to his home town and joined FK Budućnost Krušik 2014. Rajevac played all 15 fixtures, and was the best team scorer in the first half of 2014–15 season. He scored 4 goals against Pobeda Beloševac in 11th fixture, when he scored a spectacular goal from a bicycle kick, and also 1 from penalty. 2 goals scored against Bane Raška in 2nd fixtute, including 1 penalty, and against GFK Jasenica in 6th fixture, both from penalties. He also scored a goals against Jošanica in the 1st, Šumadija 1903 in 3rd, Jedinstvo Ub in 12th and Šumadija Aranđelovac in 14th fixture. He also played matches against Sloga Požega in 4th, Polet Ljubić in 5th, Karađorđe Topola in 7th, Zvižd Kučevo in 8th, Rudar Kostolac in 9th, Loznica in 10th, Smederevo in 13th, and Železničar Lajkovac in the 15th, fixture of Serbian League West. He left the club after the first half of season.
Filip moved to Poland on the beginning of 2015, and joined Siarka Tarnobrzeg for 6 months. He made his debut for new team on 8 march 2015, in lost of Znicz Pruszków with 3:1 result. After that, he played 6 more matches until the end of season, but without goals.
After short abroad episode, Rajevac joined OFK Beograd in summer 2015, but due to administrative problems gained the right to play in 4th fixture of the Serbian SuperLiga.As of 16 May 2016
Serbian League West: 2011–12