Younger was born in Brooklyn, and raised in a Modern Orthodox Jewish household in Eltingville, Staten Island and in Fair Lawn, New Jersey. He attended a yeshiva, before entering Queens College, part of the City University of New York, where he studied political science. While at university, he started performing comedy. After leaving university, he set his sights on a career in politics, taking on a role as a policy analyst for the New York City comptroller's office, where he served as a legislative aide to Alan Hevesi. After that, he successfully managed the State Assembly campaign for Queens Democrat Melinda Katz, becoming, at 21, the city's youngest ever campaign manager. Despite his success, Younger became disenchanted with politics, and by 1995 started to seek a creative outlet that would rekindle the excitement he felt as a stand-up comedian. He wrote and directed a short film,L & M, as well as working on a number of feature films as a grip, and directing music videos and commercials.
''Boiler Room''
In 1995, he attended an interview for a job in a brokerage firm, and immediately conceived the idea that went on to become his first film, Boiler Room. He spent two years researching the underground telemarketing brokerage industry as background for his screenplay. Boiler Room was released in 2000. A corporate drama in the mold of Wall Street and Glengarry Glen Ross, with colorful dialogue that some critics compared to David Mamet, the film exposed the shady world of "chop shops", and starred Giovanni Ribisi, Vin Diesel, Nicky Katt, Jamie Kennedy, and Ben Affleck.
''Prime''
Younger's second film, Prime, is a romantic comedy about the relationship between a young Jewish man and an older gentile woman. The film stars Uma Thurman and Meryl Streep. The movie was prominently featured in the HBO show Unscripted because Bryan Greenberg, star of Unscripted was also the male lead in Prime. Younger appeared as himself in the episodes where the movie was featured.
In addition to his film projects, Younger has been published in The New Yorker, and has sold numerous television pilots to FX, NBC, ABC and Fox, to name a few. Younger is a keen motorcycle racing enthusiast, and has expressed a desire to make a film about road racing.