Senior Software Engineer, Backend (AI Platform) (Fully Remote)

Affirm, Inc.; United States; Remote; USD 140,000 - 230,000; Full time

Benefits offered by this job

Health coverage

Wellness stipend

Flexible time off

ESPP

Job summary

Affirm is a remote-first company focused on clear, predictable pay-over-time financial products. We build gateway, runtime, and evaluation systems for AI workloads, taking ownership from design to launch and on-call support.

We value distributed systems expertise and AI production experience, with a culture centered on blameless postmortems and strong technical design. Flexible time off and ESPP are offered.

Qualifications

• 4+ years in backend systems with Python or Kotlin.
• Experience with AWS, MySQL, Kubernetes, and LLMs.
• Distributed systems and AI production experience.

Responsibilities

• Build the gateway, runtime, and evals for AI workloads.
• Own projects from design to launch and on-call.
• Partner with security and infra on agentic guardrails.

Skills

Backend development (Python/Kotlin)

AWS

MySQL

Kubernetes

LLMs

Distributed systems

AI production experience

Job description

• Build the gateway, runtime, and evals for AI workloads.
• Own projects from design to launch and on-call.
• Partner with security and infra on agentic guardrails.

What We Look For:

• 4+ years in backend systems with Python or Kotlin.
• Experience with AWS, MySQL, Kubernetes, and LLMs.
• Distributed systems and AI production experience.
• 100% medical, dental, and vision coverage.
• Monthly stipends for tech, health, and wellness.
• Flexible time off and ESPP.

Affirm

We provide clear, predictable pay-over-time financial products with no hidden fees. We are a remote-first company with an engineering culture centered on blameless postmortems and detailed technical design.