Product ArchitectureTechnical DiscussionSystem Design

Design a Payment Gateway processing system.

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1 answer published. Last candidate submission on Jul 13 2026, 1:52pm PDT. Interview question asked to Software Engineers interviewing at AT&T, HelloSign, Qlik and other companies. Original question asked: Design a Payment Gateway processing system.. Question last reported by a candidate interviewing at Delhivery for a Software Engineer interview on Jun 1 2026, 5:51am PDT.