[4][5] He often worked with fellow Swedish DJ Sebastian Ingrosso on DJing, producing under the names Buy Now, Fireflies, General Moders, Mode Hookers, Outfunk, and The Sinners.

In 2004 Angello released his remix of Eurythmics' "Sweet Dreams (Are Made of This)",[8] and also has produced with Eric Prydz under the name A&P Project.

[9] In 2006, Angello has created an alias with Axwell under the name Supermongo, later renamed to Supermode,[10] in which they released the hit single "Tell Me Why", a cover version of an old Bronski Beat track, Ministry of Sound's Data Records.

[11] Following the success of Supermode's "Tell Me Why", Steve Angello's first major commercial hit as a solo artist came in 2007 from a feature on David Guetta's "Baby When the Light".

The song was a number one hit on the UK dance charts and is still a major part of Swedish House Mafia sets to this day.

In late 2008, Steve Angello, Axwell, and Sebastian Ingrosso formed the Swedish House Mafia with Eric Prydz not joining, saying he is a control freak and cannot abide with collaborations even with close friends.

[17] Around this time Swedish House Mafia released two songs, "Get Dumb" and "Leave the World Behind", however these weren't credited under the group name.

In July 2012, Swedish House Mafia again performed at Tomorrowland for the third consecutive year, this time heading the event and opening Night 2.

The supergroup stated that the final leg of this tour would be their last and the group would split up after its conclusion at Ultra Music Festival Miami 2013.

[31] A month later Steve Angello released his first song since "SLVR" called "Payback" with fellow Swedish artists Dimitri Vangelis & Wyman.

[32] Later that year, in March, Size Records gave away the first 100 releases of for free, as a promotional offer, via Google Play in the US, and through WeTransfer & Box outside of the US.

[35] The album's first single, "Wasted Love", was released on 22 July 2014, and featured vocals from Australian singer Dougy of the indie rock band The Temper Trap.

[50] The songs from Genesis, Inferno, and Paradiso along with "Nothing Scares Me Anymore" would feature on Angello's second studio album Human,[51] which was released through Size Records on 27 April 2018.