Affirm
Software EngineerAppliedAug 6, 2026

Prevent duplicate plans after terminal recovery

Recovery behavior can be as important as the first attempt in a payment flow.

Merchants need completed transactions while shoppers need each purchase represented only once.

The sale looked stuck, so we tried again—then the customer saw two plans.

Esmeralda Delgado · Store associate

He helps shoppers complete in-store purchases when the terminal reconnects after intermittent connectivity.

What pulls against what

  • recovery completion vs. duplicate prevention
  • universal keys vs. provider-specific behavior
  • certification speed vs. production confidence
  • merchant continuity vs. state integrity

What is at stake

Recovered in-store transactions must remain successful without creating duplicate financial records. Delay raises shopper confusion and merchant reconciliation work

Why Affirm

At Affirm, dependable in-store plan creation can help keep checkout and account records aligned.

Written for

Distributed systems engineerPayments integration engineerReliability-focused backend engineer

This is the setup. The work is inside.

Running it puts you in the room: the full situation and its constraints, stakeholders who push back in their own words, and the decisions that are yours to make. What you produce becomes a Day One Plan — work you can show someone instead of describing.