Domingo, together with his fellow housemate Josef Elizalde, entered the
Pinoy Big Brother house as the "Plus housemates". Their entry was given the "school rivalry" angle because they both came from schools that are considered as rivals in the Philippines. During the first week, they were given the secret task of convincing their housemates that they were "Best buds forever" who have been estranged for a number of years only to see each other again in the show's auditions. They were not able to succeed in their task because their ruse was discovered. Domingo would go on to be part of the Teen Big Four, eventually winning the Second Teen Big Placer award at the end of the season. Shortly after exiting the PBB house, Domingo joined the cast of the Philippine remake of
My Girl with Elizalde, and another ex-housemate, Nicole Uysiuseng. A few months later, Domingo joined another reality contest, the
Myx VJ Search, which he eventually won with 3 others. He was also given a regular spot in ABS-CBN's Sunday variety show,
ASAP as part of the dance group, Gigger Boys. His next project was also with the group when he took the role of Arkin in
Your Song Presents: Boystown. Aside from being a regular in the main show, he also started hosting the online counterpart of the show,
ASAP Chill-Out, with his co-host/s changing over the years. In late 2010, Domingo and his fellow Gigger Boys were launched as the hosts of the short-lived youth oriented teen variety show called
Shoutout!. The show was cancelled on February 11, 2011, after a few months on air because of low ratings. However, not long after, it was announced that Domingo was being tapped to join the elite roster of hosts for
Pinoy Big Brother: Unlimited, together with
Toni Gonzaga and
Bianca Gonzales. A week after the finale of
Unlimited, Domingo launched the opening of
Pinoy Big Brother: Teen Edition 4 with Gonzaga, Gonzales, and newly minted host,
John Prats. He also became a guest star in
ABS-CBN's ''
Kahit Puso'y Masugatan'' late in December 2012, wherein he played the part of Gerald Fernandez opposite
Andi Eigenmann's Veronica Salvacion. Aside from this, he was also a semi-regular co-host in
Sarah Geronimo's now defunct Sunday night variety show,
Sarah G. Live. After a few months of speculation, it was confirmed that ABS-CBN had decided to tap Domingo as one of the co-hosts for its Philippine franchise of the popular reality show,
The Voice of the Philippines in late 2013. He was reunited with Gonzaga for this project, and joined by her younger sister,
Alex Gonzaga. In early 2014, he was a host for the second season of ABS-CBN's afternoon reality show,
I Dare You, reuniting with Prats, and joined by IDY season 1 host
Melisa Cantiveros and
Pinoy Big Brother: Unlimited housemate, Denise Joaquin. In addition to this, Domingo was also chosen to be a game master in the second season of the reality show
The Biggest Loser Pinoy Edition: Doubles with
Matteo Guidicelli in February 2014. Domingo announced to return as co-host for the 5th season of
Pinoy Big Brother dubbed as
Pinoy Big Brother: All In in April 2014, but it still remains unknown if he will return to co-host of the
second season of
The Voice of the Philippines, which is scheduled to air in the mid-2014. In addition, during the 2014 "
MYX Music Awards", it was announced that Domingo was officially back on the roster of
Myx VJs and was given the segment "Tuesdays with Robi". Aside from television, Domingo has also starred in a few films, one of which was
Cinco, a five-part horror anthology. This film marked the last project that he would have with fellow Gigger Boy
AJ Perez before the latter died at the age of 18 in a
vehicular accident in
Moncada, Tarlac on midnight of April 17, 2011. As of 2020, he quits again as a host VJ for MYX for the second time due to retrenchment of ABS-CBN's non-renewal of their franchise amid the
COVID-19 pandemic in the Philippines, but still active in mostly Kapamilya programs. ==Personal life==