Software Engineer II - CIAM

About this role

Build and maintain backend services for customer identity and authentication, including registration, login, authorization, and account lifecycle flows. Deliver scoped CIAM features with an emphasis on security, reliability, and operational rigor, supported by mentorship from experienced engineers.

About the company

Affirm offers buy now, pay later financing that lets consumers split purchases into transparent installment payments at checkout. It partners with merchants to provide flexible credit options without late fees.

Stack

What you'll do

• Build authentication features such as MFA, step-up authentication, and device binding
• Develop backend services and APIs for secure customer account access
• Integrate identity technologies with web, mobile, and partner applications
• Contribute to designs, write automated tests, review code, and deploy features
• Debug services and improve reliability using production logs and metrics

What we're looking for

• Ability to write, test, and debug software in Python, Kotlin, or a similar language
• Foundational knowledge of backend development, APIs, data structures, databases, and version control
• Interest in authentication and building secure, reliable customer experiences
• Practical problem-solving skills and willingness to learn through mentorship and code review
• Clear communication and ability to collaborate across engineering, product, and security

Nice to have

• Experience with identity protocols or CIAM platforms

Benefits

• 100% subsidized medical, dental, and vision coverage for employees and dependents
• Monthly health, wellness, and technology spending stipends
• Flexible time off and generous holidays
• Employee stock purchase plan with a discount
• Potential equity rewards