Remote-First Product Security Engineer (CIAM/Auth)

Affirm, Inc.; Sioux Falls (SD); Remote; USD 146,000 - 225,000; Full time

Benefits offered by this job

Health coverage for you and dependents

Tech stipend and wellness benefits

Equity opportunity via ESPP

Job summary

Affirm, Inc. is seeking a hands-on mid‑engineer to join our Information Security team. You will develop backend services powering registration, login, and account lifecycle for B2C and B2B experiences, with a focus on secure, scalable authentication.

You’ll work with Python or Kotlin, integrate Okta, Auth0, and ForgeRock, and ship features with tests and production readiness. Remote-first with flexible in‑person onboarding supports a nationwide team.

Qualifications

• Demonstrated ability to write, test, and debug software in Python, Kotlin, or a similar language through coursework, internships, personal projects, open source, or professional work.
• Foundational understanding of backend development, including APIs, data structures, databases, and version control.
• Genuine curiosity about how authentication works and motivation to build secure, reliable customer experiences.
• A practical problem‑solving approach, willingness to ask questions, and openness to learning through mentorship and code review.
• Clear communication and the ability to collaborate with engineering, product, and security teammates.
• This position requires either equivalent practical experience or a Bachelor’s degree in a related field.

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

APIs

Backend development

Team collaboration

Education

Bachelor's degree in a related field

Tools

Okta

Auth0

ForgeRock

Job description

Affirm, Inc. is seeking a hands-on mid‑engineer to join our Information Security team. You will develop backend services powering registration, login, and account lifecycle for B2C and B2B experiences, with a focus on secure, scalable authentication.

You’ll work with Python or Kotlin, integrate Okta, Auth0, and ForgeRock, and ship features with tests and production readiness. Remote-first with flexible in‑person onboarding supports a nationwide team.