Senior CIAM Software Engineer

About This RoleAI processing…

Key Responsibilities

• 1
  Design, build, and operate core CIAM backend services that support customer registration, authentication, authorization, account lifecycle, and profile management for B2C and B2B platforms.
• 2
  Implement and extend identity standards such as OAuth 2.0, OIDC, SAML, and SCIM in code, ensuring correctness, scalability, and clean integration patterns.
• 3
  Develop backend APIs and services in Python and Kotlin that expose identity capabilities to web, mobile, and partner applications.
• 4
  Integrate CIAM platforms with internal systems, including user data stores, messaging, fraud signals, and downstream customer platforms.
• 5
  Own secure authentication and account flows end to end, including MFA, step-up authentication, device binding, consent, and adaptive authentication logic.
• 6
  Automate CIAM infrastructure and deployments using Infrastructure as Code and CI/CD pipelines, treating identity as a core platform service.
• 7
  Monitor, debug, and optimize CIAM services for performance, resilience, and abuse detection in high-scale environments.
• 8
  Strong experience designing and implementing CIAM systems, with deep, hands-on knowledge of OAuth 2.0, OIDC, SAML, and SCIM beyond basic configuration.
• 9
  5+ years of professional backend software engineering experience
• 10
  Strong production experience in Python or a similar backend language
• 11
  Experience designing APIs, automation frameworks, and distributed systems
• 12
  Hands-on experience building and maintaining CI/CD pipelines
• 13
  Experience with GitHub-based development workflows and Buildkite or similar build systems
• 14
  Experience with cloud-native development, preferably AWS
• 15
  Hands-on experience extending and integrating CIAM platforms such as Okta, Auth0, Ping Identity, ForgeRock, or Azure AD B2C using custom code, hooks, and APIs.
• 16
  Solid understanding of backend and distributed systems fundamentals, including API design, data modeling, latency, error handling, and observability.
• 17
  Experience with Infrastructure as Code and automation tools such as Terraform, plus CI/CD pipelines for deploying backend services.
• 18
  Strong security fundamentals applied through engineering, including access control models, token handling, encryption, MFA, and privacy by design.
• 19
  Clear communication skills and the ability to work closely with product, frontend, mobile, and security teams while owning backend identity services.
• 20
  Familiarity with tools such as Cursor and other AI-augmented development environments
• 21
  Health care coverage - Affirm covers all premiums for all levels of coverage for you and your dependents
• 22
  Flexible Spending Wallets - generous stipends for spending on Technology, Food, various Lifestyle needs, and family forming expenses
• 23
  Time off - competitive vacation and holiday schedules allowing you to take time off to rest and recharge
• 24
  ESPP - An employee stock purchase plan enabling you to buy shares of Affirm at a discount

Requirements

• Strong experience designing and implementing CIAM systems, with deep, hands-on knowledge of OAuth 2.0, OIDC, SAML, and SCIM beyond basic configuration.
• Strong production experience in Python or a similar backend language
• Experience with GitHub-based development workflows and Buildkite or similar build systems
• Experience with cloud-native development, preferably AWS
• Experience with Infrastructure as Code and automation tools such as Terraform, plus CI/CD pipelines for deploying backend services.
• Familiarity with tools such as Cursor and other AI-augmented development environments
• Affirmers in proximal roles have the flexibility to work remotely, but will occasionally be required to work out of their assigned Affirm office.
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Perks & Benefits