Infrastructure Engineer

• Design, build, operate, and scale the platform powering Sezzle's interest-free installment payments and shopping experience
• Own complex infrastructure initiatives from architecture and prototyping through implementation, production rollout, and ongoing operation
• Identify system limits and implement improvements for increasing traffic, data volume, and workload complexity
• Connect business workflows to infrastructure, application, and data behavior to improve performance, reliability, and cost efficiency
• Build capacity models, run load and stress tests, diagnose bottlenecks, and validate improvements
• Design resilient AWS account, IAM, network, and service architectures
• Build and operate the Kubernetes platform, including lifecycle automation, workload isolation, resource allocation, autoscaling, upgrades, and deployment reliability
• Scale and optimize Aurora RDS for MySQL and Postgres, including queries, indexes, connections, replication, failover, schema changes, and migrations
• Define and instrument service-level objectives and error budgets; implement failure isolation, backpressure, load shedding, and safe retries
• Participate in on-call and lead technical recovery during serious incidents and outages
• Design, test, and document disaster recovery, backup, restore, and failover mechanisms
• Build infrastructure-as-code and operational automation to make provisioning, deployments, upgrades, and recovery reproducible
• Improve observability through metrics, logs, traces, dashboards, and actionable alerts
• Deliver safe infrastructure migrations with phased rollouts, validation, and rollback paths
• Improve cloud cost efficiency through resource right-sizing, utilization, autoscaling, and storage optimization
• Build and evaluate AI-assisted tooling for incident investigation, runbooks, anomaly analysis, and repetitive operations
• Write architecture proposals, evaluate technology tradeoffs, review shared-infrastructure changes, and document system operation and failure
• Report to engineering leadership and collaborate with application engineering, Security, and Compliance

Explore Principal Infrastructure Engineer at Sezzle. Review requirements and application details.