Every technology here runs locally in Docker first, then gets explained from the ground up — not just commands, but why it exists and how it works internally. Learn → build → teach.
Columnar OLAP internals, MergeTree, replication & scale
MVCC, WAL, indexing, query planning, replication
Data structures, caching, pub/sub, distributed locks
Exchanges, queues, routing, dead letters, retries
Topics, partitions, consumer groups, exactly-once
S3-compatible object storage, buckets, presigned URLs
Prometheus, Grafana, Loki, distributed tracing
Reverse proxy, load balancing, TLS, caching
Pods, deployments, services, StatefulSets, Helm
For every technology: what problem does it solve, why wasn't something else enough, how does it work internally, how is it deployed, monitored, scaled, and backed up — and what actually breaks in production. If you can answer those, you've learned it, not memorized it.