1 answer published. Last candidate submission on Jun 25 2026, 8:39am PDT. Interview question asked to Technical Program Managers, Machine Learning Engineers, Production Engineers and other roles interviewing at ZocDoc, Bitdefender, Duolingo and other companies. Original question asked: Design a system for real-time fraud detection in financial transactions.. Question last reported by a candidate interviewing at Ironclad for an Engineering Manager interview on Aug 14 2026, 1:36pm PDT.