Senior Backend AI Platform Engineer

Build AI platform infrastructure with Python or Kotlin as a remote Senior Backend Engineer at Affirm, serving teams and production workloads.

This senior-level role owns technical decisions and projects across design, launch, and on-call. You will build highly available distributed systems using AWS, MySQL, and Kubernetes. Your work supports LLM gateways, agent runtimes, evaluation services, identity, routing, caching, and failover controls.

Key Responsibilities:

• Design gateway, runtime, and evaluation services for production AI workloads
• Plan projects and own decisions from design through launch
• Build identity, quota, routing, caching, and failover controls
• Monitor systems through metrics, alerts, runbooks, and on-call
• Mentor engineers and improve design, coding, and testing practices

Requirements:

• Four or more years designing backend systems at scale
• Experience with Python or Kotlin, AWS, MySQL, and Kubernetes
• Production experience with LLMs, agents, or AI frameworks
• Equivalent practical experience or a related Bachelor’s degree
• Strong written and verbal communication for global collaboration

Bring distributed systems expertise and production AI experience to Affirm’s remote AI Platform team across Canada.