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Alexa Amundson ec7b1445b5 kpi: auto-update metrics 2026-03-13

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Alexa Amundson

Database Engineer

amundsonalexa@gmail.com | github.com/blackboxprogramming

Summary

Different data needs different storage. Designed and operate 283 databases across 5 engines — PostgreSQL for transactions, SQLite for embedded state, D1 for serverless, KV for edge config, Qdrant for vectors. Each one chosen for a reason.

Experience

BlackRoad OS | Founder & Database Engineer | 2025–Present

The Decision: Why 5 Engines, Not 1

PostgreSQL (11 DBs) for relational data that needs ACID guarantees — user state, application data, fleet metadata
SQLite (230 DBs, 1.4 GB) for embedded, zero-config storage — agent memory, metrics history, local state. No server process, instant access
Cloudflare D1 (23 DBs) for serverless apps at the edge — data lives next to the Workers that query it. Millisecond reads globally
KV (47 namespaces) for configuration and caching — edge-distributed, eventually consistent, perfect for feature flags and session data

The Search: Finding Anything Instantly

FTS5 full-text search across 156,675 memory entries — the entire knowledge base searchable in under a millisecond
Code search engine indexing 354 repos — find any function, any file, any pattern across the whole codebase
111 registered systems tracked in a systems database — every device, service, and endpoint has a record

Technical Skills

PostgreSQL, SQLite/FTS5, Cloudflare D1, KV stores, Qdrant, SQL, Python, database design

Metrics

Metric	Value	Source
PostgreSQL DBs	live	services.sh — psql -l via SSH
SQLite DBs	live	local.sh — find ~/.blackroad -name *.db
Total DB Rows	live	local.sh — sqlite3 row count across 230 DBs
D1 Databases	live	cloudflare.sh — wrangler d1 list --json
KV Namespaces	live	cloudflare.sh — wrangler kv list
FTS5 Entries	live	local.sh — sqlite3 FTS5 count

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