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Max Nussenbaum

Max Nussenbaum

Writer, product leader, and startup founder with a creative background

Brooklyn, New York, United States
Joined February 2026

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Summary

Max Nussenbaum is a seasoned product leader and startup founder with a strong background in writing and communication. He has held significant roles such as Head of Product at Upside and co-founder/CEO of Castle Co., a property management startup that successfully raised $4 million and went through Y Combinator. His career demonstrates a blend of entrepreneurial drive and strategic product development, even navigating a company through its winding down, extracting valuable lessons. maxnuss+4
Max leverages his creative writing background from Wesleyan University to excel in communication roles, currently serving as a Business & Product Writer at Stripe. His writing extends to his popular newsletter, 'Candy for Breakfast,' where he explores diverse topics, and his co-authored guide, 'Oversubscribed,' on seed fundraising. This highlights his ability to translate complex ideas into engaging content for various audiences. maxnuss+5
An early participant in Venture for America, Max Nussenbaum showed an inclination towards impact and community development by moving to Detroit to work in a startup environment. This experience also led him to co-found Rebirth Realty, where he was involved in rehabilitating abandoned properties, demonstrating his commitment to rebuilding and innovation beyond traditional tech spaces. maxnuss+2
Max has a unique and varied set of interests and past experiences, including ghostwriting dating app profiles, winning The New Yorker cartoon caption contest, and being a game show contestant. These diverse experiences showcase his creative flair and willingness to engage in unconventional projects, contributing to a well-rounded and interesting professional persona. maxnuss+2

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Hobbies

Max has previously engaged in creative pursuits including fiction writing, musical lyricism, and freestyle rapping. maxnuss+1

Max won The New Yorker cartoon caption contest. maxnuss