Learn systems by seeing them.

Interactive scenes for backend, infrastructure, and systems concepts. The scene is the lesson; the text is the appendix.

Lessons · 3 published

• GPU basics and how inference actually runs

  SMs, the memory hierarchy, why matmul is the whole game, and how a transformer forward pass maps to silicon.

  intermediate·18 min

• How Postgres data lives on disk

  The actual bytes — files, 8KB pages, tuples, indexes, WAL, MVCC.

  intermediate·22 min

• How TCP actually works

  The three-way handshake, sliding windows, congestion control, and the four-way teardown — with real sequence numbers.

  intermediate·20 min