See how systems really work

How real companies architect their systems, from their own engineering publications, and how the technologies underneath work inside, with simulations you can run in the browser. Every claim is sourced.

• Git Internals: How Version Control Really Works: Discover how Git actually works. Explore blobs, trees, commits, branches, HEAD, merging, rebasing, and remote synchronization through interactive diagrams.
• Kubernetes Architecture: How Container Orchestration Really Works: Understand Kubernetes from the inside. Explore the API server, etcd, scheduler, Pods, networking, scaling and self-healing with interactive architecture diagrams.
• PostgreSQL Internals: How a Relational Database Really Works: How PostgreSQL works inside: postmaster and backends, query planning, pages, shared buffers, WAL, checkpoints, crash recovery, MVCC, isolation levels and VACUUM — interactive and sourced.
• NATS: Inside a High-Performance Messaging System: How NATS works inside: protocol, subjects, queue groups, request–reply, JetStream streams, consumers, acks, Raft replication, gateways and leaf nodes — interactive and sourced.
• Netflix System Architecture: How Global Video Streaming Works: Interactive, sourced deep dive into Netflix architecture: Open Connect CDN, playback, encoding, AWS microservices, data, personalization and resilience.