Backend Identity Engineer - Auth & CIAM (Remote)

Affirm, Inc.; St. Louis (MO); Remote; USD 146,000 - 225,000; Full time

Benefits offered by this job

Health coverage for you and dependents

Monthly stipends for tech setup

Time off & holidays

ESPP

Job summary

Affirm, Inc. is a remote‑first tech company redefining how people pay over time.

We’re seeking a hands‑on mid‑level engineer to contribute to core CIAM capabilities, building secure registration, login, and account lifecycle features for B2C and B2B. You’ll work in Python or Kotlin, integrate with Okta, Auth0, and ForgeRock, and ship backend services with emphasis on security, reliability, and observability.

Qualifications

• Experience writing, testing, and debugging software in Python or Kotlin.
• Foundational backend API development experience.
• Interest in CIAM and security principles.

Responsibilities

• Build and ship customer-facing authentication features—from smoother login experiences to MFA, step-up authentication, and device binding, with mentorship from experienced engineers.
• Develop backend services and APIs in Python or Kotlin, turning product requirements into working software that helps customers access their accounts securely.
• Work with modern identity technologies such as Okta, Auth0, and ForgeRock, writing custom code and integrations that connect identity capabilities to web, mobile, and partner applications.
• Take scoped features through the software development lifecycle: contribute to design, write readable code and automated tests, participate in code reviews, and deploy to production with support from the team.
• Solve real engineering problems by debugging services, improving reliability, and using logs and metrics to understand how your code behaves in production.
• Collaborate with engineering and product partners, learn secure development practices, and grow your software engineering skills while building expertise in authentication.

Skills

Python

Kotlin

Backend development

APIs

Security fundamentals

Education

Bachelor’s degree or equivalent

Job description

Affirm, Inc. is a remote‑first tech company redefining how people pay over time.

We’re seeking a hands‑on mid‑level engineer to contribute to core CIAM capabilities, building secure registration, login, and account lifecycle features for B2C and B2B. You’ll work in Python or Kotlin, integrate with Okta, Auth0, and ForgeRock, and ship backend services with emphasis on security, reliability, and observability.