153K–213K CAD / year
Senior Software Engineer, Backend (Workload Safety)
BackendRemote — Canada
Published on 2026-10-21
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About this role
Build and enforce workload safety standards across Affirm’s fleet of more than 85 Amazon EKS clusters. Lead standards from research and onboarding through automation, helping protect availability, latency, and cost as the infrastructure scales.
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.
The team
Workload Safety team
Stack
KubernetesAmazon EKSGoPythonOPA GatekeeperKyvernoKarpenterEC2
What you'll do
- Define and evolve workload safety standards for resource settings, isolation, placement, and disruption tolerance
- Own standards from research and prototyping through onboarding, guidance, policy, and automation
- Lead cross-team initiatives and fleet-wide rollouts; mentor engineers and guide technical quality
- Diagnose workload and node-lifecycle issues, including termination, disruption-budget, and Karpenter problems
- Set safe cluster operating limits and develop control-plane scaling patterns
- Analyze workload resource profiles to guide EC2 instance strategy
- Measure standards’ impact on availability, latency, risk, and cost
- Participate in Kubernetes runtime on-call and turn recurring incidents into systemic improvements
What we're looking for
- 5+ years running Kubernetes in production at scale, ideally Amazon EKS across many clusters
- Deep knowledge of Kubernetes resource management, scheduling, pod lifecycle, and disruption management
- Experience enforcing configuration standards with admission control and policy-as-code
- Proficiency in Go or Python and production infrastructure software such as controllers, operators, or admission webhooks
- Strong production debugging skills and ability to convert recurring incidents into systemic fixes
- Experience leading cross-team technical initiatives, driving adoption, and mentoring engineers
- Ability to quantify infrastructure changes’ impact on availability, latency, and cost
- Strong written communication for standards and self-service guidance
Benefits
- 100% subsidized medical, dental, and vision coverage for employees and dependents
- Monthly technology, health, and wellness spending stipends
- Flexible time off and generous holiday calendars
- Employee stock purchase plan with a stock discount
- Equity rewards may be available