“How do you ensure an order is processed once when a payment callback is repeated?”
Then, a follow-up
Practice with my project What happens if the order updates successfully, but its fulfillment event is never sent?
Make your constraints, reliability decisions and system boundaries clear.
Start with your resumeBring a project you know well. Start with what you did, then explore decisions, evidence and the limits of your approach.
What happens if the order updates successfully, but its fulfillment event is never sent?
Write down the context, your own actions and verifiable results. Leave out private contact details and confidential work. Practice scores reflect your answers, not a hiring decision.
Read the project storytelling guide