Platform engineering is the practice of designing and building internal developer platforms (IDPs) that enable product teams to deploy code safely and quickly with minimal operational overhead. A platform engineer abstracts away infrastructure complexity—Kubernetes, networking, databases, secrets management, monitoring—and exposes simple self-service interfaces that product teams use to manage their applications. An IDP typically includes: containerization and orchestration (Kubernetes), deployment automation (GitOps with ArgoCD or Flux), observability (metrics, logs, traces), identity and access management, cost tracking, and runbooks. The goal is to reduce toil (repetitive, low-value operational work) and accelerate time-to-deployment.