Staff Product Security Engineer

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Affirm

WebsiteLinkedInAll Job Openings

1001 - 5000 employees

Founded 2012

💳 Fintech

👥 B2C

🛍️ eCommerce

💰 Post-IPO Equity on 2021-01

Fintech • B2C • eCommerce

Affirm is a financial technology company that offers a 'Buy Now, Pay Later' service, allowing consumers to make purchases and pay for them over time with flexible payment plans. Affirm eliminates hidden fees and compound interest, providing clear terms and conditions for its users. The company also offers the Affirm Card, a debit card that allows users to request to pay over time for larger purchases or pay in full for smaller ones. Affirm partners with various retailers across multiple categories, including electronics, apparel, and travel, providing customers with the convenience of paying over time at checkout both online and in physical stores. Affirm's services are integrated with Apple Pay, enabling customers to make payments seamlessly from their iPhone or iPad.

📋 Description

• Design, build, and operate core CIAM backend services supporting customer registration, authentication, authorization, account lifecycle, and profile management for B2C and B2B platforms • Implement and extend OAuth 2.0, OIDC, SAML, and SCIM identity standards • Develop backend APIs and services in Python and Kotlin for web, mobile, and partner applications • Integrate CIAM platforms with user data stores, messaging, fraud signals, and downstream customer platforms • Own secure authentication and account flows, including MFA, step-up authentication, device binding, consent, and adaptive authentication • Automate CIAM infrastructure and deployments with Infrastructure as Code and CI/CD pipelines • Monitor, debug, and optimize CIAM services for performance, resilience, and abuse detection • Deliver major features and system components through technical and execution plans • Collaborate with partner engineering, product, frontend, mobile, and security teams

🎯 Requirements

• 7+ years of experience designing, developing, and launching backend systems at scale using Python or Kotlin • 5+ years of professional backend software engineering experience • Strong experience designing and implementing CIAM systems • Deep hands-on knowledge of OAuth 2.0, OIDC, SAML, and SCIM • 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 • Experience extending and integrating CIAM platforms such as Okta, Auth0, Ping Identity, ForgeRock, or Azure AD B2C • Understanding of API design, data modeling, latency, error handling, and observability • Experience with Infrastructure as Code and automation tools such as Terraform • Security fundamentals including access control, token handling, encryption, MFA, and privacy by design • Strong verbal and written communication skills • Familiarity with Cursor and other AI-augmented development environments

🏖️ Benefits

• 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 • Equity rewards may be included in the total compensation package • Monthly stipends for health, wellness and tech spending • Dental and vision coverage for you and your dependents • Reasonable accommodations during the hiring process