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Alexa Amundson
ec7b1445b5
RoadChain-SHA2048: c645c1292ab1555e RoadChain-Identity: alexa@sovereign RoadChain-Full: c645c1292ab1555ebe6982915536d1c94701ff6bb16c20ed6ef4144eb50c9f984b4bfe5b9902109e8defd958d6be43ced8ec11cf95d6241536cd4da0b75f8fb48cbeb1b9f450c8f665b73d39e837d23e73e2ba4201af4dc40c02a34283efb04b39c612083465536f194f16adfadb1b56f714a65b918f40750f54eebf7724236861de173ec31963ff3b1b988d712be7e5acc3fe391eb804d3fdcfb9ccf77afc732660d23fff801f894318327eabf775eb4f4e67f7f22d07f23b0e17f6594cfe95b83b275fb7baaa97115e86562604fc5b47cc8024574b61396924e0ee2b7e454b0a1480c3076c7ad72408ceb4a75360d2d49c7d805c37ac5315af00e4a8ca2262
51 lines
2.3 KiB
Markdown
51 lines
2.3 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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When your production fleet is single-board computers, every kernel parameter matters. Tuned CPU governors, stabilized voltage, integrated PCIe AI accelerators, and squeezed production workloads from hardware that fits in your hand.
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---
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## Experience
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### BlackRoad OS | Founder & Systems Engineer | 2025–Present
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**The Constraint: Maximum Work from Minimum Hardware**
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- A Pi 5 has 8 GB RAM, a quad-core ARM, and a 30W power budget. It needs to run Docker, Ollama, Nginx, PostgreSQL, and 50+ systemd services simultaneously
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- Tuned swappiness to 10, dirty_ratio to 40, applied conservative CPU governors, capped frequency to 2 GHz — workloads stable, temperatures safe
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- GPU memory reduced from 256MB to 16MB on headless nodes — freed RAM for actual compute. Disabled cups, rpcbind, nfs, lightdm across fleet
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**The Integration: Making Hardware Talk**
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- 2x Hailo-8 NPU via PCIe — installed drivers, firmware, verified /dev/hailo0 on both nodes. 52 TOPS of AI acceleration, zero cloud cost
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- NVMe SSD on Octavia (1TB) — faster I/O for Gitea, Docker images, and model weights. USB peripherals: UART, keyboards, microphones, OLED displays
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- Overclock on one node caused undervoltage (0.75V) — removed overclock, tuned config.txt, recovered +95mV. Fleet-wide voltage monitoring deployed
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**The Discipline: 256 Services, Zero Chaos**
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- 256 systemd services and 35 timers across fleet — each one has a purpose, a health check, and an owner
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- Self-healing watchdogs restart failed services. Power monitoring logs every 5 minutes. Everything persistent across reboots via sysctl.d and tmpfiles.d
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---
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## Technical Skills
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Linux kernel, systemd, sysctl, PCIe, I2C, GPIO, Hailo-8, NVMe, Bash, Python
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---
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## Metrics
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| Metric | Value | Source |
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|--------|-------|--------|
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| Systemd Services | *live* | services.sh — systemctl list-units via SSH |
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| Systemd Timers | *live* | services.sh — systemctl list-timers via SSH |
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| Fleet Nodes | *live* | fleet.sh — SSH probe to all nodes |
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| Avg Temp | *live* | fleet.sh — /sys/class/thermal via SSH |
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| Fleet RAM (MB) | *live* | fleet.sh — /proc/meminfo via SSH |
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| Fleet Storage (GB) | *live* | fleet.sh — df via SSH |
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