Jack Lassen - Linux Infrastructure Engineer

Engineering Profile

Systems Engineer specializing in bare-metal deployments, infrastructure automation, and software-defined networking. Focused on building self-healing systems, tuning Linux kernels, and deploying immutable environments. Pragmatic problem solver dedicated to eliminating operational toil through clean scripting and practical architecture—**strictly focused on engineering pipelines and server environments, not helpdesk queues or identity management.**

Core Tech Stack

Environments & Runtimes

Fedora Kinoite, Ubuntu Server, DietPi, CoreOS, Docker, Podman, systemd-nspawn, Proxmox VE, KVM/QEMU.

Networking & Routing

WireGuard routing, Tailscale/ZeroTier mesh networks, OPNsense, CoreDNS, Unbound, nftables, custom VPN tunnels.

Automation & Code

Bash, Python, Ansible, systemd unit generation, custom KWin scripts, web APIs / lightweight service utilities.

Experience

Systems Engineer Imperial Artillery Dec 2021 – Present

Engineered and maintained virtualization clusters and automated backup pipelines for secure manufacturing infrastructure.
Architected cross-site software-defined networks using a WireGuard and Tailscale hybrid layout to abstract external connectivity safely.
Deployed reproducible container runtimes and configured immutable host systems utilizing rpm-ostree overlays to secure critical edge devices.

Data Center Technician GoDaddy Mar 2021 – Dec 2021

Provisioned, mapped, and rumbled hardware lifecycle tasks for large-scale rack infrastructure; configured secure out-of-band management via IPMI/BMC interfaces.
Troubleshot Layer 1/2 physical networking issues and managed system migrations from physical bare-metal hardware directly into virtualization layers.

NOC Infrastructure Technician Phoenix NAP Jan 2020 – May 2021

Monitored networking matrices, ran remote packet captures (tcpdump/wireshark) to isolate throughput drops, and maintained storage array pools.
Wrote utility scripts to compress multi-step diagnostics into singular commands, decreasing overall triage metrics during core link flapping events.

Open Source & Systems Built

Filedropper

A bare-bones, highly efficient web service designed for rapid file streaming across local and remote targets. Built with lean execution in mind to bypass sluggish standard file-sharing bloat, maintaining a lightweight runtime signature and zero arbitrary size limits.

Distributed Mesh DNS Architecture

Designed a decentralized, multi-region CoreDNS + Unbound naming layer linking hybrid footprints (Oracle Cloud nodes and custom home lab clusters) securely via automated software mesh topologies.

Hardware Gadget KVM Tool

Programmed a Raspberry Pi Zero configuration running Linux USB gadget functions (Ethernet emulation, serial passthrough, and custom HID profiles) to dynamically mount, boot, and recover un-networked target boxes on physical site floors.