Sandar started playing the piano and singing in the Bulgarian National Group Radiodeca (Radiochildren) at the early age of 5 years.

[4] In the same year, Alek Sandar had his first appearance in the prestigious TV show Kato Luvovete (Like The Lions) in front of a national audience.

[7] In Oldenburg, Alek Sandar took acting classes and played leading roles in productions of the German National Theater Oldenburgisches Staatstheater.

They form the Electropop duo Splendid Sounds in 2008 and while performing in various nightclubs in Berlin, they release their album and remix EP Scream.

[11] At the same time, Alek Sandar collaborates closely with German singer Oscar Loya, who gained international popularity representing Germany in the Eurovision Song Contest in 2009.

[14] In the same year, Sandar produces a Remix for Cherrytree-signed musician Frankmusik and Far East Movement, released by Universal Music Germany.

[29] In the video clip, Sandar proves again his talent as director and producer, shooting at world-famous locations such as the Plaza Hotel in Manhattan.

[30] In the beginning of 2016, "Parata Ako Hvana", a song Sandar co-wrote for Bulgarian singer Galin, receives the Planeta TV Award for "Club Hit of The Year".

[31] In September 2016, Sandar is one of the protagonists of the popular TV Show in Bulgaria VIP Brother, the Bulgarian celebrity version of the reality TV show Big Brother, along with other celebrities like the popfolk singers Emanuela and Reni, former football player and president of the Bulgarian Professional Football League Valentin Mihov and international box legend Mike Tyson.

Openly bisexual,[32] Alek Sandar's international performances and video clips make him a highly discussed figure in his home country Bulgaria.

[33][34] Even though the musician himself does not perceive his work as extraordinarily avant-garde,[35] TV and newspapers frequently refer to him as eccentric and scandalous,[36] quoting his video clips, nightlife performances and close relations with New Yorker nightlife LGBT personalities Amanda Lepore, Richie Rich, Susanne Bartsch and Yozmit.

[37] In 2015, Alek Sandar releases "P.O.R.N", a song talking about our need to display our life on social media by being sexy and seeking likes.