What this interview will probe
Infrastructure engineers design and maintain the distributed systems powering xAI's Colossus supercluster, working across Kubernetes scaling (controllers, admission plugins), Envoy-based load balancing, observability, and exabyte-scale storage. The goal is efficiency, reliability, and performance for compute and data platforms at extreme scale. A technical interview would probe large-scale distributed systems design, deep Kubernetes internals and custom controllers, traffic-shaping and load-balancing with Envoy, and reasoning about throughput and failure handling in high-QPS production systems.
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