BuildKite is a CI/CD platform offering elastic, distributed build execution. Instead of paying vendors per-job, you run agents on your own infrastructure (AWS, Kubernetes, bare metal) and scale them elastically. BuildKite provides the orchestration, visibility, and insights without lock-in. Organizations running high-volume test suites benefit from BuildKite's efficiency. DevOps engineers and platform teams use it to scale CI/CD for large codebases. It's a valuable skill for teams running Kubernetes and cost-conscious companies.