Defensor Sporting Arambarri was born in
Salto, and joined
Defensor Sporting's youth setup in 2011 after impressing in a local youth tournament. He was promoted to the first team in July 2013 by manager
Tabaré Silva, and made his professional – and
Primera División – debut on 15 September by starting in a 1–0 home win against
Fénix. Arambarri continued to feature regularly for
La Viola in the following seasons, and scored his first senior goal on 21 March 2015 by netting the first in a 1–1 home draw against
Cerro.
Bordeaux On 31 January 2016, Arambarri signed a four-and-a-half-year contract with
Ligue 1 side
FC Girondins de Bordeaux. He made his debut for the club on 3 February, coming on as a second-half
substitute for
Valentin Vada in a 3–0 away loss against
Olympique Lyonnais. Arambarri was only rarely used by the club in the
2016–17 campaign, being limited to four league appearances, all from the bench.
Getafe On 9 August 2017, after having his federative rights assigned to
Boston River, Arambarri signed a one-year loan deal with
La Liga club
Getafe CF, with a buyout clause, which was activated on 11 June 2018. Arambarri signed a five-year contract. ==International career==