Close is hiring a Senior or Staff Backend Engineer for its Backend Platform team. The role focuses on building shared API foundations, cloud development environments (DevDawg), AI review/root-cause tooling (Spice), observability, and safe guardrails for coding agents. The stack centers on Python (Flask) with data stores like MongoDB and PostgreSQL, infrastructure on AWS and Kubernetes, and tooling such as Terraform, Docker, and Kafka. This position is US-only and remote.