Killian O'Connell is a versatile software engineer, experienced in Objective-C, Swift, React, React Native, and Python. He earned a Bachelor of Science in Business Information Systems, focusing on IT and business management, from the University College Cork.

His professional career started with an internship at JRI America, where he worked on Java development. He also served as the Java tutor at the University College Cork before joining Betfair as a Graduate iOS Developer. He then joined Big Health, where he served as a Junior iOS Developer before becoming a Mobile and then a Software Engineer. During his time at Big Health, he worked on numerous projects, honing his skills in developing mobile applications, and improving user experience.

Killian is also passionate about economics and served as the Chairman and Auditor of the UCC Economics Society. Moreover, he is a founding director of the CSGC group, a company focused on providing business solutions to clients.