Senior Backend Engineer, Authentication Platform (Remote)

Affirm is seeking a Senior Software Engineer for the Consumer Authentication Platform. The role focuses on building secure, reliable authentication experiences across millions of users and merchants, spanning sign-up, sign-in, account recovery, and step-up challenges.

You will lead architectural initiatives and deliver reusable authentication capabilities across geographies. The ideal candidate has 4+ years designing backend systems at scale, deep knowledge of OAuth/OpenID and related security