Affirm is reinventing credit to make it more honest and friendly, giving consumers the flexibility to buy now and pay later without any hidden fees or compounding interest
Affirm is building the next generation of customer identity and authentication. This role is a hands-on engineering position inside Information Security, focused on designing and shipping core CIAM capabilities that protect customers and support growth
You will build and operate backend services that power registration, login, authorization, and account lifecycle flows across B2C and B2B experiences. You will work closely with partner engineering teams and ensure identity features are delivered with strong security fundamentals, reliability, and operational rigor
What you’ll do 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
What we look for Strong experience designing and implementing CIAM systems, with deep, hands-on knowledge of OAuth 2.0, OIDC, SAML, and SCIM beyond basic configuration
5+ years of professional backend software engineering experience Strong production experience in Python or a similar backend language Experience designing APIs, automation frameworks, and distributed systems Hands-on experience building and maintaining CI/CD pipelines Experience with GitHub-based development workflows and Buildkite or similar build systems Experience with cloud-native development, preferably AWS 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
Solid understanding of backend and distributed systems fundamentals, including API design, data modeling, latency, error handling, and observability
Experience with Infrastructure as Code and automation tools such as Terraform, plus CI/CD pipelines for deploying backend services
Strong security fundamentals applied through engineering, including access control models, token handling, encryption, MFA, and privacy by design
Clear communication skills and the ability to work closely with product, frontend, mobile, and security teams while owning backend identity services
Familiarity with tools such as Cursor and other AI-augmented development environments Base Pay Grade - N Equity Grade - USA 9 Employees new to Affirm typically come in at the start of the pay range. Affirm focuses on providing a simple and transparent pay structure which is based on a variety of factors, including location, experience and job-related skills
Base pay is part of a total compensation package that may include equity rewards, monthly stipends for health, wellness and tech spending, and benefits (including 100% subsidized medical coverage, dental and vision for you and your dependents.) USA base pay range (CA, WA, NY, NJ, CT) per year: $195,000 - $255,000 USA base pay range (all other U.S. states) per year: $173,000 - $233,000 #LI-Remote Affirm is proud to be a remote-first company! The majority of our roles are remote and you can work almost anywhere within the country of employment. Affirmers in proximal roles have the flexibility to work remotely, but will occasionally be required to work out of their assigned Affirm office. A limited number of roles remain office-based due to the nature of their job responsibilities
We’re extremely proud to offer competitive benefits that are anchored to our core value of people come first. Some key highlights of our benefits package include: Health care coverage - Affirm covers all premiums for all levels of coverage for you and your dependents Flexible Spending Wallets - generous stipends for spending on Technology, Food, various Lifestyle needs, and family forming expenses Time off - competitive vacation and holiday schedules allowing you to take time off to rest and recharge ESPP - An employee stock purchase plan enabling you to buy shares of Affirm at a discount We believe It’s On Us to provide an inclusive interview experience for all, including people with disabilities. We are happy to provide reasonable accommodations to candidates in need of individualized support during the hiring process
[For U.S. positions that could be performed in Los Angeles or San Francisco] Pursuant to the San Francisco Fair Chance Ordinance and Los Angeles Fair Chance Initiative for Hiring Ordinance, Affirm will consider for employment qualified applicants with arrest and conviction records
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