[4] He had the recurring role of Deshawn in the Amazon web series Betas, and in 2018 appeared as Lonnie Laloush in Super Troopers 2 and as Ivanhoe in BlacKkKlansman.

[5][6] He has also appeared as a guest star on the television series Unbreakable Kimmy Schmidt, The Night Shift, Superstore, Key & Peele, It's Always Sunny in Philadelphia, Community, Blunt Talk, I Think You Should Leave, Bupkis, and Cobra Kai.

[9] Although known for his comedic turns, Hauser gained broad recognition and critical praise for his portrayal of the serial killer Larry Hall in the 2022 Apple TV+ true crime miniseries Black Bird, adapted from James Keene's memoir In with the Devil.

Critic Nick Schager wrote of Hauser's performance, "even in a sea of maniacal villains, his Larry Hall stands out as a uniquely cunning madman, so unpredictable and unnerving as to be downright unforgettable.

In 2024, Hauser became attached to the true-crime drama Fruitcake alongside Jennifer Garner;[11] the lead role in a bio-pic about actor-comedian Chris Farley;[12] a reboot of The Naked Gun franchise;[13] the Marvel Cinematic Universe film The Fantastic Four: First Steps (2025);[14] a biographical film about Bruce Springsteen titled Deliver Me from Nowhere, in the role of guitar tech Mike Batlan;[15] and the comedy Balls Up alongside Mark Wahlberg.

[16] An upcoming film of his is The Luckiest Man in America, in which he plays Michael Larson, a contestant accused of cheating on the game show Press Your Luck in 1984.