Ship discovery and merchandising features for Affirm's deals feed and affiliate marketplace

A full-stack role on Affirm's Marketplace Performance team, building the deals feed, affiliate, payment attribution, and merchandising systems that help shoppers find the right merchant and financing. The interview will focus on shipping features with React/Vue and Python/Kotlin APIs, breaking down projects into phased delivery, and collaborating across product, design, and analytics.

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What this interview tests

Shipping web features with React or Vue
Designing and launching APIs at scale in Python or Kotlin
Breaking a larger project into phased, deliverable tasks
Debugging and code review in a large existing codebase
Monitoring metrics and supporting on-call/operational health

Common question themes

A full-stack feature you shipped: frontend framework + backend API

Breaking a project into phases and delivering incrementally

Debugging an unfamiliar part of a large codebase

Giving and receiving feedback in code review

Proactively seeking feedback to grow as an engineer

Supporting metrics/monitoring and on-call for owned systems

How candidates describe it

Real Software Engineer II interview stories — retold from candidates' public write-ups, with sources.

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