Build AI platform services at Affirm using Python or Kotlin, designing reliable backend systems for production workloads at scale. Work remotely within your home country.

As a Senior Backend Software Engineer, you will own technical decisions across the AI Platform team. You will build governed interfaces for models, tools, and agents while supporting identity, reliability, security, and cost attribution. The work spans gateway, runtime, and evaluation services.

Key Responsibilities:

- Plan and own AI Platform projects from design through on-call
- Build gateway, runtime, and evaluation services
- Implement identity, quota, routing, caching, and failover controls
- Monitor systems through metrics, alerting, runbooks, and on-call
- Mentor engineers and improve design, coding, and testing practices

Requirements:

- Four-plus years designing backend systems at scale
- Production experience with LLMs, agents, or AI frameworks
- Proficiency making significant changes in large codebases
- Experience with AWS, MySQL, and Kubernetes
- Bachelor’s degree or equivalent practical experience

Apply backend engineering, AI workload, and distributed systems expertise to Affirm’s governed AI Platform infrastructure.

📌 Senior AI Platform Backend Engineer (Montreal)
🏢 Affirm
📍 Montreal