Ben Callis is a seasoned software developer specializing in iOS applications, currently serving as a Senior iOS Developer at YNAB since August 2025. Previously, Ben has taken on various roles including Lead iOS Developer at Waracle, where contributions included developing a pension app for Royal London and an iOS mobile banking app for a UK challenger bank. Ben also launched the Watch to 5K app for Apple Watch, which has gained significant traction. With experience as an independent mobile app developer, Ben has developed multiple apps including DealPad and FanAds, and has a background at notable firms such as Skyscanner and J.P. Morgan. Ben holds a BSC Honours degree in Mobile Software Engineering from the University of Glasgow.
This person is not in any teams
This person is not in any offices