Career
Internacional
Born in Porto Alegre, Rio Grande do Sul, Allan rose slowly through the ranks as a youth product of his hometown club Internacional. Goal Brazil’s deputy editor Rodrigo Calvozzo claimed Allan "was always treated by Internacional as one of the most important players in the team"
Liverpool
In the summer of 2015, he joined English Premier League club Liverpool for a fee of £500,000 after impressing the club"s coaches at the Frenz International Cup. = Seinäjoen Jalkapallokerho (loan) On 2 September 2015, he was loaned to Finnish club Seinäjoen Jalkapallokerho on a short term deal.
Allan scored on his debut eight days later, coming on in the 56th minute for Jussi Vasara and opening the scoring sixteen minutes later in a 1–1 draw away to KuPS. On 29 October 2015, Allan returned from his loan spell to Liverpool, greeting the new manager of the club, Jürgen Klopp, for the first time.
= Sint-Truiden (loan) On 18 January 2016, Liverpool announced that Allan had been loaned to Belgian club Sint-Truiden for the remainder of the season. A central midfielder by trade, Allan is primarily left-footed and employs a strong passing range, honed with time spent as a deep-lying playmaker in Brazil.
Allan has proven himself a useful box-to-box midfielder with promising attacking instincts.