The 40-year-old, who played at Camp Nou in the 1990s, believes the former Valencia star will fit in well with Tito Vilanova's squad as he is familiar with the club's philosophy
The 23-year-old full-back has signed a five-year contract with Barca after the Catalans agreed a €14 million deal with Valencia at the end of June.
The former Che man spent part of his youth career in the La Masia youth system, and Barjuan has no doubt that the defender will adapt seamlessly to the Camp Nou playing style.
"He is fast, good on the ball and good going forward, and offers a cutting edge and patience," Sergi told Marca. "He has the Barca hallmark.
"The advantage is that Jordi knows the club's philosophy inside out. That will help him adapt.
"He learned his stuff at La Masia and has gone on to cut his teeth and improve his game at Valencia, where he got some great experience."
Meanwhile, Albert Ferrer, who also played in Catalunya in the 1990s, stated that Jordi Alba is a quality addition to the side, but admitted that the Blaugrana will lose some aerial presence in defence.
"He is an extremely well-rounded defender, and is quick and very smart," Ferrer noted. "He gives the team balance, since he will open things up on the left flank.
"Until now Barcelona attacked much more on the right with Daniel Alves, because neither [Eric] Abidal nor Adriano had the same threat goinf forward.
"But there is a lack of height. They will probably struggle with crosses from free-kicks and corners, because their only tall players will be the two centre-backs and Sergio Busquets, but that is this Barca's style of play.
"The team spends most of its time on the attack and needs fast players who offer penetration. Having said that, if the full-backs push forward a lot, the rest will have to make sure they cover for them."