First-time day at Affirm

Stop duplicates in onboarding without merging multi-store merchants

Published Oct 23, 2026

You’re the software engineer. Your team is in the room.

The setting

is a buy now, pay later company that offers installment loans at checkout to shoppers and payment tools to merchants. is the pay-over-time financing that merchants add to their checkout.

Merchant identity matching must stop duplicates without merging real store relationships.

Fast onboarding protects activation, while careful matching protects the merchant data used for risk analysis and fraud detection.

Who you’d be doing this for

“I’ve got two setup links for the same store, and finance is asking which one is real.”

Sylvie Wolf · Merchant Payments Manager · a character in this brief

Owns the merchant’s checkout payment methods and coordinates activation with its commerce-platform team.

What is at stake

Duplicate merchant identities are splitting setup status for new platform merchants. You have to protect quick activation without collapsing legitimate multi-store relationships.

Why it isn’t already fixed

Every obvious fix costs something else. That’s the part you’d have to decide.

  • activation speed vs. identity accuracy
  • automatic matching vs. multi-store integrity
  • partner compatibility vs. shared-data consistency
  • fast release vs. rollback confidence

Why Affirm

Merchant Data Platform records connect onboarding touchpoints to the APIs merchants use to accept financing at checkout.

Written with these in mind

backend platform builderdata integrity engineermerchant integration engineer

Not your kind of problem? 128 more at Affirm, or browse every organization.

Where the organization context comes fromThe postings this brief was written from, and the reporting read before it.

The organization context comes from public information. The situation and characters are written for the brief.

Job postings it was written from

Public descriptions of the work at Affirm. They are listed as sources, not as openings. The lines under a posting are its own words, where it meets this brief.

  • Software Engineer II, Frontend (Marketing and Privacy) · no longer posted
    • You will work in a modern web stack across React, TypeScript, shared component systems, testing, performance, and observability, with opportunities to develop deeper expertise in technologies such as Google Tag Manager, analytics and experimentation platforms, conversion tracking, and marketing APIs.
  • Software Engineer II, Backend (Partner Merchant Interface) (opens in a new tab)
  • Senior Software Engineer, Backend (Partner Merchant Interface) · no longer posted
  • Staff Software Engineer · no longer posted

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.

Other live briefs connected to this one, and what connects them.

Similar problems at other organizations

Like this one, each of these is about money moving incorrectly, late, or twice.

The same setting, from another role

Each is set around Affirm’s Affirm for Merchants, written for a different role. They’re separate briefs, not the same scenario.

Other problems with a similar purpose

In each of these, as in this one, the aim is to make complex payment systems feel dependable in the exact real-world moment someone needs to complete one.