Andrian Budantsov is the CEO of Hypersequent and creator of QA Sphere. With decades of tech industry experience, Andrian co-founded Readdle as Chief Technology Officer (CTO) in 2007, a role he held until December 2022. During that time, Readdle grew into a global company, creating popular apps like Spark Mail and PDF Expert. Its apps have been downloaded over 200 million times worldwide, and have earned numerous industry awards, including Red Dot, Golden Kitty, and Apple App store accolades. Andrian also served as CTO of Fluix, Readdle's B2B document management software division. Since 2023, Andrian has dedicated his expertise to Hypersequent, his own venture, focused on developing advanced software testing tools.