https://juliantellez.com/blog Julian Tellez is a software engineer in London working across broadcasting, video streaming and site reliability. Available for contract work. Projects, writing and CV. en-GB https://juliantellez.com/blog/talking-to-claude-code-through-alexa https://juliantellez.com/blog/talking-to-claude-code-through-alexa Sat, 27 Jun 2026 00:00:00 GMT An afternoon experiment: wiring an Amazon Echo to drive Claude Code on my own Mac. The fun was not the voice, it was designing a planning conversation around an LLM that is too slow to answer inside Alexa's eight second window, and then thinking about what a real product would need. https://juliantellez.com/blog/stop-letting-ai-mark-its-own-homework https://juliantellez.com/blog/stop-letting-ai-mark-its-own-homework Sun, 15 Feb 2026 00:00:00 GMT Why letting an AI review its own code is marking its own homework, and how Greenlight enforces a TDD trust boundary between the agents that write tests and the agents that write code. https://juliantellez.com/blog/raspberry-pi-kubernetes-cluster-load-balancer https://juliantellez.com/blog/raspberry-pi-kubernetes-cluster-load-balancer Thu, 10 Nov 2022 00:00:00 GMT Give bare-metal services real external IPs with MetalLB as a Layer 2 load balancer for the Raspberry Pi cluster. https://juliantellez.com/blog/raspberry-pi-kubernetes-cluster-nfs-storage https://juliantellez.com/blog/raspberry-pi-kubernetes-cluster-nfs-storage Mon, 10 Oct 2022 00:00:00 GMT Set up an NFS server on a worker node and wire it into the cluster as default storage with PersistentVolume and PersistentVolumeClaim manifests. https://juliantellez.com/blog/raspberry-pi-kubernetes-cluster-start-the-cluster https://juliantellez.com/blog/raspberry-pi-kubernetes-cluster-start-the-cluster Fri, 30 Sep 2022 00:00:00 GMT Install Kubernetes on the Raspberry Pi cluster: containerd, kubeadm, the Flannel CNI, then initialise the master node and join the workers. https://juliantellez.com/blog/raspberry-pi-kubernetes-cluster-ssh-into-the-nodes https://juliantellez.com/blog/raspberry-pi-kubernetes-cluster-ssh-into-the-nodes Wed, 21 Sep 2022 00:00:00 GMT Find your Raspberry Pi nodes on the network with nmap and connect over SSH, both by password and with RSA keys. https://juliantellez.com/blog/raspberry-pi-kubernetes-cluster-os-installation https://juliantellez.com/blog/raspberry-pi-kubernetes-cluster-os-installation Tue, 13 Sep 2022 00:00:00 GMT Flash Ubuntu 22.04 onto SD cards and prepare each Raspberry Pi node: locate the disk, write the image with dd, and enable SSH. https://juliantellez.com/blog/raspberry-pi-kubernetes-cluster-equipment https://juliantellez.com/blog/raspberry-pi-kubernetes-cluster-equipment Fri, 09 Sep 2022 00:00:00 GMT The first in a series on building a Kubernetes home lab with Raspberry Pi: the prerequisites and the equipment to get started.