In 2020 Waldron co-founded Playco, a mobile instant game company backed by Sequoia Capital, where he currently serves as president.

[7] His early software projects included hacking AOL,[7] a favorite childhood pastime shared by other notable technology company founders such as Mark Zuckerberg.

[8] Waldron also reverse engineered the disassembled MIPS machine code of PlayStation 2 games in his spare time to add his own features.

The company's games are available within popular social applications such as Facebook, LINE, Snapchat, Viber, TikTok, Zoom and others.

[16][17] Waldron has made early-stage investments, advised, or served on the board of directors for companies such as Substack,[18] Lambda School, Kik Messenger, Asia Innovations Group,[citation needed] Snappr,[19] and over 50 others.

[24] On March 11, 2011, Zynga announced that 100 percent of the proceeds from the purchase of virtual goods from more than seven of its games would go toward Japan's Save the Children Earthquake Emergency Fund.

[25][26] During the 2012 holiday season, Zynga.org partnered with Toys for Tots in its largest charitable campaign not related to disaster relief.