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Affirm interview questions

39 questions24 coding2 system design13 behavioral5 freeUpdated

This is every question in the Affirm guide, in one list: 24 coding problems, 2 system designs and 13 behavioral questions, drawn from what candidates report about Affirm interviews.

Each row shows the round it comes from and links to the lesson that works through it. 5 are free to read in full. The other 34 are Premium, and here you still see their round, difficulty and topic, so you know what you're walking into.

Open the Affirm guide Unlock all 39

Affirm coding interview questions

24 problems, in the order the guide teaches them. The 4 tagged OA are covered in the online assessment lessons. Each lesson gives the full problem, a worked solution and the follow-ups interviewers tend to add.

1Random Access With DuplicatesFreeCodingMediumHash Maps & Class Design
2Most Bought AlongsideFreeCodingMediumHash Maps & Class Design
3Loan Volume: The Trailing HourFreeCodingMediumHash Maps & Class Design
4Reservoir Sampling: Pick From a StreamFreeCodingMediumHash Maps & Class Design
5Premium medium problemCodingMediumCard Games, Trees and Stacks
6Premium medium problemCodingMediumCard Games, Trees and Stacks
7Premium medium problemCodingMediumCard Games, Trees and Stacks
8Premium medium problemCodingMediumCard Games, Trees and Stacks
9Premium medium problemCodingMediumCard Games, Trees and Stacks
10Premium medium problemCodingMediumThe Machine-Coding Round
11Premium hard problemCodingHardThe Machine-Coding Round
12Premium medium problemCodingMediumThe Machine-Coding Round
13Premium easy problemCodingEasyThe Machine-Coding Round
14Premium medium problemCodingMediumEvent Logs and CSV Data
15Premium easy problemCodingEasyEvent Logs and CSV Data
16Premium medium problemCodingMediumEvent Logs and CSV Data
17Premium medium problemCodingMediumStrings and Nested Data
18Premium easy problemCodingEasyStrings and Nested Data
19Premium medium problemCodingMediumStrings and Nested Data
20Premium medium problemOAMediumAssessment and DP Classics
21Premium easy problemOAEasyAssessment and DP Classics
22Premium medium problemOAMediumAssessment and DP Classics
23Premium medium problemOAMediumAssessment and DP Classics
24Premium medium problemSystem designMediumDesign an Experimentation Platform

Affirm system design interview questions

2 designs, each worked end to end in its own lesson, from requirements to the architecture and its trade-offs.

#Question
1Design a Payment SystemFree
2Design an Experimentation Platform (Premium)

A lock means the design is named here and its walkthrough is Premium.

Affirm behavioral interview questions

13 questions, grouped by what the interviewer is testing. The lesson explains why each one gets asked and what a strong answer covers.

Ownership (3)

All 3 are Premium

Collaboration (3)

All 3 are Premium

Impact (2)

All 2 are Premium

Dealing with ambiguity (3)

All 3 are Premium

Motivation (2)

All 2 are Premium

Read the Affirm behavioral questions

See all 39 Affirm questions by name

Premium opens the 34 locked questions on this page, each with the full prompt and a worked answer, and every other lesson in all 100 company guides.

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Common questions

How many questions are in the Affirm interview guide?

39: 24 coding problems, 2 system designs and 13 behavioral questions. The guide was last updated in November 2026.

Which rounds do these Affirm interview questions come from?

Of the 24 coding problems, 19 come from the coding rounds, 4 from the online assessment and 1 from the system design lessons. The 2 system designs and 13 behavioral questions come from the system design and behavioral rounds. Every row in the list carries its round, so you can start with the one you have booked.

Which Affirm interview questions are free?

5 of the 39 are free to read in full, marked Free in the list. The other 34 come with Premium, which also opens all 100 company guides.