Affirm is seeking a mid-level Software Engineer in Canada to join the Information Security team. You will help build backend services powering registration, login, authorization, and account lifecycle for both B2C and B2B experiences, with a focus on secure, scalable CIAM capabilities. You’ll work with Python or Kotlin, contribute through the full SDLC, and collaborate with cross-functional partners to ship reliable authentication features and improve system resilience in production.