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Alexa Amundson
292fa97a8e
RoadChain-SHA2048: 9f948f149bd9f508 RoadChain-Identity: alexa@sovereign RoadChain-Full: 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
74 lines
2.7 KiB
Markdown
74 lines
2.7 KiB
Markdown
# Alexa Amundson
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**Systems Engineer**
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amundsonalexa@gmail.com | [github.com/blackboxprogramming](https://github.com/blackboxprogramming)
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---
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## Summary
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Systems engineer managing 256 systemd services across a 7-node Linux fleet. Deep expertise in kernel tuning, power optimization, thermal management, device drivers (Hailo-8 NPU, I2C, GPIO, UART), and distributed system reliability with automated monitoring and self-healing.
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---
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## Experience
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### BlackRoad OS | Founder & Systems Lead | 2025–Present
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**Linux Systems**
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- Manage 5 Raspberry Pi nodes (Debian Bookworm) + 2 Ubuntu VMs
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- Configure and tune 256 systemd services and 35 timers
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- Kernel parameter optimization: CPU governors, swappiness, dirty_ratio, WiFi power management
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- Custom udev rules for device persistence (vcio, Hailo-8, USB peripherals)
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- Boot configuration: cmdline.txt, config.txt, /etc/sysctl.d/ for persistent tuning
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**Hardware & Device Drivers**
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- 2× Hailo-8 AI accelerators: PCIe driver installation, /dev/hailo0 device management
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- I2C devices: Pironman5 OLED display (0x3c), sensor interfaces
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- UART/serial: CP2102 adapters, BL808 RISC-V dev boards
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- GPIO: IR receivers, custom peripheral control
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- NVMe storage: 1 TB drive on Octavia for high-speed workloads
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**Performance Engineering**
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- Resolved thermal throttling: identified runaway processes, reduced 73.8°C → 57.9°C
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- Fixed undervoltage: removed overclock settings, tuned voltage (+95mV recovery)
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- Power optimization deployed fleet-wide: conservative governors, GPU memory reduction (256→16 MB)
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- Boot-persistent config via tmpfiles.d, rc.local, sysctl.d
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**Networking**
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- WireGuard mesh VPN across all nodes
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- DNS infrastructure: Pi-hole, PowerDNS (Docker), dnsmasq with custom zones (.cece, .blackroad)
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- Nginx (48 sites), Cloudflare tunnels (4), Tailscale (9 peers)
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- Network diagnostics: 106 active connections monitored, 867 processes tracked
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**Security**
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- Credential rotation: migrated secrets from crontabs to env files (chmod 600)
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- Identified and removed obfuscated cron dropper (malware)
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- SSH key audit: 50+ keys on Alice/Octavia
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- UFW firewall management on edge nodes
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---
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## Technical Skills
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**OS:** Debian, Raspberry Pi OS, Ubuntu, systemd, udev, kernel tuning
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**Hardware:** Hailo-8 NPU, Raspberry Pi 5, I2C, GPIO, UART, PCIe, NVMe
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**Networking:** WireGuard, Tailscale, Nginx, DNS (Pi-hole, PowerDNS, dnsmasq)
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**Security:** SSH hardening, credential management, firewall (UFW/nftables)
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**Scripting:** Bash (212 tools, 91 scripts), Python
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---
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## Metrics
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| Metric | Value |
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|--------|-------|
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| Systemd services | 256 |
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| Fleet nodes | 7 |
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| AI acceleration | 52 TOPS |
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| Processes managed | 867 |
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| Network connections | 106 |
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| Automated tasks | 52 |
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| CLI tools | 212 |
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