jrcichra.dev

I’m a Senior Systems Engineer at NVIDIA who loves writing software and building solutions with new technologies.

Home Projects

  • Android Location Tracker - Rust backend, React Native frontend
  • Distributed block storage for Kubernetes, written in Rust (WAL replication, quorum writes, CSI plugin) — built largely with AI coding agents
  • bitwarden-secrets-operator, which reconciles BitwardenSecrets into Kubernetes Secrets
  • Bluetooth App that opens gate with Raspberry Pi, relays, and reed switches
  • Phidget Temperatures and Humidity Sensor collection with Go into MySQL, displayed in Grafana
  • Raspberry Pi car automation - record with ignition - downloads dashcam footage when arriving home
  • Homelab ARM64 ZFS NAS serving NFS & iSCSI LUNs
  • Two k3s clusters - home rack + Oracle Cloud - hosting everything above
  • Linux VFIO/GPU passthrough for graphics-accelerated virtual machines
skills
Languages
  • Go
  • Rust
  • Python
  • TypeScript
  • NodeJS
  • Perl
  • Assembly (x86 & 6809)
  • Shell
Infrastructure
  • Kubernetes
  • Docker
  • Helm
  • cdk8s
  • KubeVirt
  • GitHub Actions
  • Ansible
  • Salt
  • Vagrant
  • kube-vip
  • MetalLB
Storage & Databases
  • ZFS
  • Ceph
  • NFS
  • SMB
  • iSCSI
  • PXE / TFTP / squashfs
  • MySQL
  • Postgres
  • Oracle
  • CockroachDB
Networking
  • IPv6
  • BGP
  • Wireshark
  • Wireguard
  • Nebula
  • Tailscale
Cloud
  • AWS
  • GCP
  • Azure
  • Oracle Cloud
  • OVH
  • Linode
  • Cloudflare
Observability
  • Grafana
  • Prometheus
  • Alertmanager
Protocols
  • gRPC
  • Protobuf
  • REST
tools i use
Development
  • Visual Studio Code
  • vim
  • Claude Code
  • Codex
  • pi
  • opencode
Operating Systems
  • Arch Linux (ZFS root)
  • Windows 11 (KVM/VFIO guest)
  • macOS Mojave (KVM/VFIO guest)
  • Raspberry Pi OS
Workflow
  • SSH
  • Cloudflare
  • Nebula
  • Kubernetes / k3s / k3d
  • GitHub Actions
  • Postgres / MySQL / CockroachDB
cpuAMD Ryzen 3900X
gpu (host)AMD WX2100
gpu (guest)AMD 6700XT
gpu (compute)NVIDIA RTX 5090
storageSamsung 970 EVO Plus 2TB + 970 EVO 1TB
ram32GB Corsair