Designed and deployed a complete observability infrastructure (metrics, logging, alerting) for a full-stack multiplayer web platform — Prometheus, Grafana, ELK stack, containerized with Docker Compose.
Built a fully bootable Linux system from scratch — cross-compilation toolchain, kernel compilation, filesystem hierarchy, init system, and bootloader. Automated across 14 build stages.
Provisioned a multi-node K3s cluster using Vagrant and VirtualBox, with ingress routing, GitOps-style deployment via ArgoCD, and full cluster networking.