Born in Esmeraldas, Collahuazo began his career in the youth academy of Emelec.
Collahuazo's first team debut with Emelec was postponed due to a call-up for a microcycle with the Ecuador under-17 team in September 2023, with teammate Diogo Bagüí drafted in to cover for an injury crisis instead.
[2][3] On 29 February 2024, it was reported that New York Red Bulls II had acquired Collahuazo on a 1 year loan deal with an option to purchase from Emelec.
[5] He was called up again for the 2023 FIFA U-17 World Cup, stating that if his teammates were all focused, they could win the tournament.
[6][7] Initially a midfielder when he began playing football at the age of eight, Collahuazo was converted to a defender during his career, due to his imposing height – standing at 1.96 m.[8] He has named compatriot Piero Hincapié as an inspiration to him, stating that he hopes to follow in the Ecuador international's footsteps.