Redis
Event loop, memory management, RDB/AOF persistence, cluster gossip, replication, streams, Lua scripting, modules.
Linux Kernel
Subsystem architecture, scheduler (EEVDF), memory management, VFS, networking stack, device model, LSM security, eBPF hooks.
Chromium / V8
Multi-process architecture, Blink rendering pipeline, V8 4-tier JIT, Orinoco GC, Mojo IPC, compositor, network stack, site isolation.
Lichess
Lila Scala core, lila-ws Rust WebSockets, MongoDB storage, Redis pub/sub, fishnet distributed analysis, Stockfish, tournaments, puzzles, OAuth API.
Bluesky / AT Protocol
PDS, Relay/BGS, App View, Feed Generators, Labelers, DID identity (did:plc, did:web), Lexicon schemas, XRPC, MST data repos, Ozone moderation, firehose.
Home Assistant
Core event bus, state machine, HASS OS, Supervisor, 2700+ integrations, MQTT, Zigbee/Z-Wave, automations engine, Lovelace dashboard, Companion app, Nabu Casa cloud, ESPHome.