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Alexa Amundson
292fa97a8e
RoadChain-SHA2048: 9f948f149bd9f508 RoadChain-Identity: alexa@sovereign RoadChain-Full: 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
74 lines
2.9 KiB
Markdown
74 lines
2.9 KiB
Markdown
# Alexa Amundson
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**Site Reliability 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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SRE managing a 7-node distributed fleet with 256 systemd services, 52 automated tasks, and self-healing autonomy. Maintains 48+ production domains, 99 Cloudflare deployments, and a daily KPI system tracking 60+ reliability metrics across 9 data sources.
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---
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## Experience
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### BlackRoad OS | Founder & SRE Lead | 2025–Present
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**Reliability & Uptime**
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- Operate 5 Raspberry Pi edge nodes + 2 cloud VMs with WireGuard mesh connectivity
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- Implement self-healing cron automation: heartbeat every 1 minute, heal cycle every 5 minutes
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- Monitor and resolve 12 failed systemd units across fleet with automated restart policies
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- Manage 48 Nginx reverse proxy sites routing traffic to backend services
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**Incident Response**
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- Identified and resolved thermal throttling (73.8°C → 57.9°C) caused by runaway Ollama loops
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- Fixed undervoltage issues across Pi fleet via config.txt tuning (+95mV recovery)
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- Discovered and removed obfuscated cron dropper (security incident on Cecilia)
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- Resolved swap exhaustion (100% on Cecilia) by identifying memory-hungry services
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- Migrated leaked credentials from plaintext crontabs to secured env files (chmod 600)
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**Monitoring & Observability**
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- Built 9-collector KPI system: GitHub, Gitea, fleet, services, autonomy, LOC, local, Cloudflare, deep GitHub
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- Track 60+ metrics daily: commits, fleet health, temperatures, swap, processes, connections
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- Distributed tracing database with nanosecond-precision spans
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- Per-node SSH health probes with Python-based remote execution
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- Power monitoring deployed to all nodes (cron every 5 minutes, persistent logs)
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**Infrastructure Management**
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- 14 Docker containers via Docker Swarm with leader election
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- 11 PostgreSQL databases with automated backup
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- 9 Tailscale mesh peers for secure cross-network access
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- 4 Cloudflare tunnels routing 48+ domains to fleet services
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**Capacity Planning**
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- Fleet: 20 GB RAM, 707 GB storage, 52 TOPS AI compute
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- Identified and disabled 16 skeleton microservices freeing 800 MB RAM
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- Cleaned 19 GB of stale GitHub Actions runner directories
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- Power optimization: conservative CPU governors, WiFi power management, GPU memory reduction
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---
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## Technical Skills
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**SRE:** systemd, cron, Nginx, Docker Swarm, WireGuard, Tailscale, Cloudflare Tunnels
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**Monitoring:** Custom KPI collection, distributed tracing, thermal/voltage monitoring, SSH probes
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**Incident Response:** Root cause analysis, credential rotation, service isolation, capacity recovery
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**Languages:** Bash (212 CLI tools), Python, JavaScript
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**Cloud:** Cloudflare (99 Pages, 22 D1, 46 KV, 11 R2), DigitalOcean
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---
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## Metrics
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| Metric | Value |
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|--------|-------|
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| Services managed | 256 |
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| Automated tasks | 52 |
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| Domains served | 48+ |
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| KPI metrics tracked | 60+ |
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| Fleet nodes | 7 |
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| Incident resolutions | 10+ |
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| Docker containers | 14 |
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