On 16 January 2015, Rober was loaned to fellow league team Granada CF, until June.[5] On 25 January 2015, he scored his first professional goal, netting the last in a 2–2 home draw against Deportivo de La Coruña.[6]
On 13 July 2015, Rober returned to the Andalusians, in a season-long loan deal.[7] He would only appear in 18 matches during the campaign (seven starts), as his side avoided relegation. On 31 August of the following year, he moved to fellow top tier CD Leganés, after agreeing to a one-year loan deal.[8]
On 21 November 2016, Rober scored a double in a 2–0 home win against CA Osasuna, but suffered a serious knee injury which sidelined him for the remainder of the season.[9] On 3 January 2018, he signed a three-and-a-half-year contract with Getafe CF still in the top tier, but was immediately loaned to Osasuna in Segunda División until June.[10]
On 29 January 2019, after being sparingly used by Geta in the 2018–19 campaign, Rober returned to Osasuna on loan until June.[11] On 12 August, after achieving promotion to the top tier, he signed a permanent four-year deal with the club, for a fee of € 2 million; his release clause was set at €10 million.[12]
On 24 August 2020, Rober returned to Lega on loan for the 2020–21 season, with an obligatory buyout clause in case of promotion.[13] He rejoined the club for a third spell on 11 January 2022, also on loan.[14]
On 10 August 2022, Rober signed a two-year contract with Levante UD in the second level.[15] On 30 August 2024, he was dismissed from the club.[16]