Backend Engineer, CIAM & Security (Remote)

Affirm, Inc.; Austin (TX); Remote; USD 146,000 - 206,000; Full time

Benefits offered by this job

100% subsidized medical coverage

Equity rewards

Monthly stipends for health, wellness,

Tech spending stipends

ESPP

Job summary

Affirm, Inc. is building the next generation of customer identity and authentication. This hands-on, mid-engineering role sits inside Information Security, contributing to core CIAM capabilities that protect customers and support growth.

You will help build backend services powering registration, login, authorization, and account lifecycle flows across B2C and B2B experiences. You will work with experienced engineers to deliver scoped identity features with strong security, reliability, and

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.

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.

Skills

Python

Kotlin

APIs

Backend development

Security fundamentals

Communication

Education

Bachelor's degree or equivalent

Tools

Okta

Auth0

ForgeRock

Job description

Affirm, Inc. is building the next generation of customer identity and authentication. This hands-on, mid-engineering role sits inside Information Security, contributing to core CIAM capabilities that protect customers and support growth.

You will help build backend services powering registration, login, authorization, and account lifecycle flows across B2C and B2B experiences. You will work with experienced engineers to deliver scoped identity features with strong security, reliability, and