$ whoami
Lennard V. John
Platform Engineer
I build and automate infrastructure — and I teach it. This site runs on a Kubernetes cluster I built from bare metal, provisioned with Terraform, configured with Ansible, and deployed continuously through Argo CD.
The site is the portfolio. Every page you are reading is served from my own hardware, reached through a zero-trust Cloudflare Tunnel with no inbound ports open.
What I work with
Kubernetes · Terraform · Ansible · Argo CD · Prometheus · Grafana · Docker · Cloudflare · Linux · GitHub Actions
Infrastructure as Code
Three-node Kubernetes cluster provisioned end-to-end from a single pipeline. No manual server setup, no snowflake configuration.
GitOps
Argo CD reconciles the cluster against this repository. Changing what runs in production means opening a pull request, not running a command.
Teaching
I run holiday tech camps for kids, and I document my own engineering failures in detail so others can learn from them.