At 15, Achaga began her career as a model, travelling up to five hours every week by bus from Mar del Plata to Buenos Aires for jobs.

Other modeling work included a 2010 commercial for Marinela cookies, and appearances in the magazines ParaTeens, Código Teen, Joy and Para Ti in 2011.

[1] In August 2009, she did editorial work for Cosmopolitan Argentina and appeared in the Spring/Summer 2012 print campaign for handbags for the brand CLOĒ in Mexico.

She also appeared in a web mini-series ad for Nescafé Dolce Cafe, promoting the brand alongside Gossip Girl: Acapulco in Mexico.

Achaga appeared on the cover and in an editorial spread modeling bridal dresses for Hola magazine's special "Novias" edition in November 2014.

[4][5] In October 2015, Achaga and actor Gonzalo Garcia Vivanco appeared in an autumn print campaign for Banana Republic in Mexico.

Achaga's first television job was co-hosting the Argentine version of the MTV Latin America music show Los 10+ Pedidos with Gabo Ramos in 2010.

In June 2011, she was in Mexico City attending workshop at Televisa San Ángel, where she was spotted by producer, Pedro Damián, in the cafeteria.

[6] Filming for the television series required Achaga to make the permanent move to Mexico City where production on the show lasted from October 2011 to June 2012.

[10][11] In January 2014, she filmed Páginas Negras, a horror themed television series starring Alfonso Herrera in Buenos Aires.

[12][13] In late March 2014, Achaga traveled to Pucón, Chile to begin rehearsals for Sitiados, a new historical drama television series co-produced by the Chilean network TVN and FOX International Channels.

Set from 1598 to 1601, the series is inspired by the true account of a group of Mapuche who held 500 Spanish prisoners in Villarrica, Chile during the Arauco War.

[14][15][16][17] From October 2014 to April 2015, she filmed the third season of the Fox Latin America television musical drama, Cumbia Ninja, in Bogotá, Colombia.

[18][19] In early October 2015, Achaga travelled to Lima, Peru to begin filming the television drama, El regreso de Lucas.

[22] In July 2017, Achaga was cast in the television drama series, La bella y las bestias, which began filming in Mexico City for three months.

[25][26] The remaining five members were Paulina Goto, Elezar Gómez, Natasha Dupeyrón, Yago Muñoz, and Jack Duarte.

[28][29][30] She met Juanpa Zurita on set while shooting Luis Miguel: La Serie 2 and confirmed a romantic relationship with him in 2021.