FastAPI vs Django for interactive demos
How to choose a backend for project demos without building a full product before you need one.
System Design
The architecture, trade-offs, and decisions behind systems built to endure.
Distributed SystemsAPIsData PlatformsReliability
YouTube system design: from upload to playback
Trace video ingestion, transcoding, storage, discovery, and global delivery as one connected system.
GitHub Actions as a backend system
Reusable workflows, artifacts, variables, and why pipeline design is closer to architecture than YAML.
A large-scale notification system
Model fan-out, preferences, delivery channels, retries, and rate limits without losing messages or users' trust.
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