System Design

Design a secure transaction system for online shopping.

Also asked as "Create a payment gateway system for e-commerce sites."

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1 answer published. Last candidate submission on Apr 30 2026, 7:19am PDT. Interview question asked to Production Engineering Managers, Engineering Managers, Production Engineers and other roles interviewing at Lucid Motors, Red Hat, Boeing and other companies. Original question asked: Design a secure transaction system for online shopping.. Question last reported by a candidate interviewing at Funding Circle for an Engineering Manager interview on May 18 2026, 3:41am PDT.