# Containers (Docker/Kubernetes) > Selected Engineer ApS work demonstrating Containers (Docker/Kubernetes) — the achievements that prove it. - [Developed and launched the company's first observability dashboard, providing real‑time system performance insights and data visualization on the large office TV.](https://engineer.company/portfolio/developed-and-launched-the-company-s-first-observability-9/) - [Deployed and maintained 20 Docker containerized applications, troubleshooting with Podman and Kubernetes, and managing R‑based apps on Google Cloud and AWS.](https://engineer.company/portfolio/deployed-and-maintained-20-docker-containerized-applications-troubleshooting-19/) - [Automated SSL/TLS certificate creation for 100 Docker applications, ensuring secure connections across Ubuntu Linux hosts.](https://engineer.company/portfolio/automated-ssl-tls-certificate-creation-for-100-docker-41/) - [Built GitHub Actions CI/CD pipelines with a distroless production frontend image and multi‑environment promotion.](https://engineer.company/portfolio/built-github-actions-ci-cd-pipelines-with-a-69/) - [Cut systemd sandbox exposure across every unit this platform installs — a dead‑man's‑switch service from 9.6 UNSAFE to 1.5, an internet‑facing git forge from 8.3 EXPOSED to 1.5 — and added a converge‑time parser check after finding a misspelled directive silently ignored in three unit templates.](https://engineer.company/portfolio/cut-systemd-sandbox-exposure-across-every-unit-119/) - [Deployed a container plane on Podman and Quadlet under systemd rather than Docker, because Docker publishes container ports above the host firewall's own rules — and gave deploys an unprivileged user with one fixed command instead of root.](https://engineer.company/portfolio/deployed-a-container-plane-on-podman-and-quadlet-122/)