Nicky Romero worked with many popular DJs. In 2011 and 2012, he started collaborating with celebrities. He worked on “Beta” with Hardwell, recorded “Sparks” with Fedde Le Grand, collaborated with David Guetta to create “Metropolis’, and helped Calvin Travis with his song “Iron”. At that time, many clubs started trying to book Nicky Romero for private events.
The song “Toulouse” brought the DJ big popularity. It reached the top-10 on Beatport and stayed in the chart for a long time. Nick was becoming more and more successful, acquiring new fans in the Netherlands and beyond.
In October 2012, Romero earned a prestigious award, Highest New Entry, from DJ Mag. He reached the 17th position of the magazine’s rating and became one of the most successful newbies along with Dash Berlin and Skrillex. The same year, the musician started working with a famous Swiss DJ, Avicii to record a long-awaited single "I Could Be the One". The song became extremely popular in Europe and topped the British charts.
In 2013, after releasing "I Could Be the One", the DJ recorded a new single, "Symphonica". It topped the Beatport chart. The next release was “Legacy”, on which Nick worked with Krewella.
The artist continued collaborating with other musicians. He worked with Sunnery James & Ryan Marciano to record “SOTU” with the assistance of the Swedish DJ Steve Angello and his label Size. In 2012, Romero became a resident DJ in the night club The Light Las Vegas and performed on different festivals, including Coachella, Ultra Music Festival, Electric Daisy Carnival in LA and Puerto Rico, Tomorrowland, and Sensation White
In October 2013, Nick reached the seventh spot of the DJ Mag’s rating of DJ. He worked on his own radio show, Protocol Radio, and founded a label, Protocol Recordings.
In June 2014, the artist presented a new track, "Feet On The Ground", which he recorded with a Dutch vocalist, Anouk. While working on new songs, Romero participated in charity projects, among which was 10.000 Hours - People Planet Party. His single “Legacy” was used by an Australian TV channel as a soundtrack for a popular show “Revenge” in 2014. The single reached the 44th spot of the ARIA Chart.
In 2016, Romero recorded several other popular tracks, among which were "Future Funk" with Nile Rodgers, "The Moment (Novell)", "Ready 2 Rumble", and "Crossroads" with Navarra. The same year, he presented a compilation album, Nicky Romero Best 2016, which included best hits.
In 2017, Nick worked on "Iconic" with John Christian, "Love" with SWACQ, and "Only For Your Love" with Florian Picasso. With the support of his label Protocol Recordings, the DJ presented a new compilation album, Nicky Romero presents Protocol Miami 2017. After some time, he released an EP, 5 Years of Protocol.
In 2019, Romero is planning to release a new album, Redefine.