Senior CIAM Security Engineer — Identity & Auth

Affirm; Madison (WI); On-site; USD 204,000 - 264,000; Full time

Benefits offered by this job

Health care coverage

Stipends for health/wellness/tech

Equity rewards

100% subsidized medical coverage for员工

Job summary

Affirm is building the next generation of customer identity and authentication, focusing on secure CIAM capabilities for B2C and B2B experiences. The role involves designing and shipping backend services, integrating with Okta, Auth0, and other CIAM platforms, and delivering robust authentication and account lifecycle features.

Join a remote-first company with competitive pay ranges for USA-based roles, including equity and health benefits; work with Python/Kotlin, AWS, and Kubernetes to power

Qualifications

• : 5+ years professional backend software engineering experience.
• :

Responsibilities

• Design, build, and operate core CIAM backend services that support customer registration, authentication, authorization, account lifecycle, and profile management for B2C and B2B platforms.
• Implement and extend identity standards such as OAuth 2.0, OIDC, SAML, and SCIM in code, ensuring correctness, scalability, and clean integration patterns.
• Develop backend APIs and services in Python and Kotlin that expose identity capabilities to web, mobile, and partner applications.
• Integrate CIAM platforms with internal systems, including user data stores, messaging, fraud signals, and downstream customer platforms.
• Own secure authentication and account flows end to end, including MFA, step-up authentication, device binding, consent, and adaptive authentication logic.
• Automate CIAM infrastructure and deployments using Infrastructure as Code and CI/CD pipelines, treating identity as a core platform service.
• Monitor, debug, and optimize CIAM services for performance, resilience, and abuse detection in high-scale environments.

Skills

Python

Kotlin

Distributed systems

AWS

MySQL

Spark

Kubernetes

OAuth 2.0

OIDC

SAML

SCIM

API design

CI/CD

Terraform

Security fundamentals

Tools

Buildkite

GitHub Actions

Okta

Auth0

Azure AD B2C

Terraform

Job description

Affirm is building the next generation of customer identity and authentication, focusing on secure CIAM capabilities for B2C and B2B experiences. The role involves designing and shipping backend services, integrating with Okta, Auth0, and other CIAM platforms, and delivering robust authentication and account lifecycle features.

Join a remote-first company with competitive pay ranges for USA-based roles, including equity and health benefits; work with Python/Kotlin, AWS, and Kubernetes to power