Affirm

Software Engineer, Backend Interview Experience - Canada

October 27, 2025

Positive ExperienceNo Offer

Process

Screening call with recruiter (about 30 minutes) Technical round (coding in HackerRank - about 60 minutes) Hiring Manager (about 60 minutes)

The recruiter was very informative and helpful. The overall experience is good.

I only wish they would agree to give feedback after the Hiring Manager interview.

Questions

HM asked about a time I took ownership on a project, and how much time each part of the project took.

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Interview Statistics

The following metrics were computed from 1 interview experience for the Affirm Software Engineer, Backend role in Canada.

Success Rate

Pass Rate

Affirm's interview process for their Software Engineer, Backend roles in Canada is extremely selective, failing the vast majority of engineers.

Experience Rating

Positive100%

Neutral0%

Negative0%

Candidates reported having very good feelings for Affirm's Software Engineer, Backend interview process in Canada.

Affirm Interview Questions

Shortest Uncommon Substring in an Array

Medium

Find the shortest string that is not a substring of any string within a given array of strings. Return this shortest uncommon substring.

ArraysStringsTwo PointersSliding Windows

Insert Delete GetRandom O(1)

Medium

Design a data structure that supports insertion, deletion, and random element retrieval, all in constant time on average. You'll need to handle edge cases carefully to achieve O(1) complexity.

ArraysHash Table

Group Anagrams

Medium

Given a list of words, group together all the anagrams. Anagrams are words that contain the same letters rearranged.

ArraysStrings