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Joshua 'Zerkaa' Bradley has built a significant online presence as a YouTuber and Twitch streamer, co-founding the Sidemen and expanding into various entrepreneurial ventures.
In March 2024, Zerkaa, with the Sidemen, launched a breakfast cereal brand, "Best Cereal," in collaboration with Mornflake.
Zerkaa is managed by OP Talent, an agency that handles various social influencers and content creators for lifestyle and gaming.
In 2017, Josh launched his own clothing line, ZRK London, selling streetwear apparel. In 2023, the clothing line was renamed to Internet Made.
In November 2021, Zerkaa and the Sidemen founded a restaurant chain called Sides in collaboration with Reef.
In October 2022, Zerkaa and the Sidemen launched their own vodka brand, XIX Vodka.
In May 2025, Zerkaa and the Sidemen launched their own venture capital firm, Upside VC. Josh was a Director for the firm but has formally resigned from the position.
A YouTube-focused partnership with Revolut drove the brand's most successful acquisition campaign, delivering more than 100,000 app downloads within three months.
Zi8gzag teamed up with Zerkaa for a new Geoguessr adventure, which included a special Surfshark offer.
Joshua Charlie Joseph Bradley, known online as Zerkaa, was born on September 4, 1992, in Bermondsey, London. He attended Bexley Grammar School, where he met future Sidemen member Tobi Brown. Bradley initially expressed interest in architecture but experienced a challenging period due to his parents’ divorce, leading him to find an escape in gaming, particularly ‘Call of Duty,’ for up to eight hours a day. He later pursued higher education at Ravensbourne University, earning an upper second-class honors degree in digital film production. Before dedicating himself to content creation, Bradley had brief experiences working at a bank with his father and at Sky Sports studio.
In 2009, Bradley launched his first YouTube channel, ‘Zerkaa,’ focusing initially on video game content such as ‘Call of Duty’ and ‘FIFA.’ This humble beginning set the stage for a career that would see him become a key figure in the online entertainment landscape. A pivotal moment in his career came in October 2013 when he co-founded the British YouTube group, the Sidemen, becoming the eldest member of the prominent collective. The Sidemen went on to create diverse content, including challenges, sketches, and video game commentaries, quickly amassing a large following. From 2014 to 2018, Bradley lived with fellow Sidemen members Vikkstar, KSI, and Miniminter, contributing regularly to their collaborative content before moving into an apartment with his girlfriend.
Zerkaa’s influence grew steadily throughout the 2010s. In 2018, he co-starred in ‘The Sidemen Show,’ a YouTube Premium series. The following year, ‘The Sunday Times’ recognized him as the ninth most influential online creator in the UK. His presence extends beyond YouTube; he began streaming on Twitch in 2010 and became a Twitch partner, achieving the status of the most-watched Twitch streamer in the UK in 2022 with 17.68 million hours watched. Outside of content creation, Bradley has engaged in entrepreneurial activities, launching his own clothing line, ‘ZRK London’ (later rebranded as ‘Internet Made’), and participating in various Sidemen ventures, including ‘Sidemen Clothing,’ the restaurant chain ‘Sides,’ ‘XIX Vodka,’ and ‘Best Cereal.’ He was previously a Director for Upside VC.
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