His musical life began at age three when he started playing violin after being inspired by seeing a performance by Queenie.

[4] He moved with his family to Sydney when he was seven, and at age 10 took up the saxophone, later playing in his high school jazz band.

[7] Fischer's debut release was as a featured artist on Alex Preston's single "Heartbeats" in July 2012.

[8] In September 2014, after graduating from Berklee,[9] Fischer moved to Los Angeles, where he was active in the local a cappella scene and sang backing vocals for the band Holychild[4] while writing songs and aiming for success as an artist on his own.

[18] Fischer has worked with a variety of producers and has written songs for artists including Ciara ("Dose"),[19] Elle King, Sabrina Claudio, Keith Urban, MAX, Christian French, Andy Grammer, Saygrace, and Jessie J.

In September 2022, Fischer returned to Australia for the first time since the COVID-19 pandemic, opening as a support act for British singer Mimi Webb on her tour of the country and New Zealand.