Strong experience in backend services at scale; distributed systems; data/feature pipelines; queues/caching; fault tolerance. Experience with agentic/LLM systems: multi-agent systems; agent communication/delegation; evals; long-running, fault-tolerant agents; tools/prompt/program design; guardrails. Experience with evaluation & experimentation: Designing evals; monitoring performance/drift; fundamentals of Data Science/ML. Experience with Cloud & ops: Kubernetes, Docker, IaC (Terraform/CDK), networking, secrets, observability (Grafana/Prometheus/Datadog), CI/CD. Experience with Model ops: Fine-tuning/RL; designing agent environments; managing inference. Experience with Enterprise delivery: Security/compliance, data governance, integration with legacy systems.