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.
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Senior Backend AI Platform Engineer in London employer: Affirm, Inc.
Affirm is an exceptional employer that fosters a collaborative and innovative work culture, particularly for the Staff Backend Engineer role in Canada. With a strong emphasis on employee growth, you will have the opportunity to mentor fellow engineers and lead impactful projects that align with business goals, all while enjoying the flexibility of a remote work environment that promotes work-life balance.
