Frontend Handbook

Frontend System Design

How senior engineers approach frontend design problems: a repeatable method first, then case studies that apply it. Interactive references, not server demos.

3 of 3 pages written

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The design method
A repeatable way to run any frontend design prompt: clarify requirements, shape the architecture and data model, define the interface, go deep on the hard parts, and defend the trade-offs — with interactive references.
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Design a news feed
The method applied end to end to an infinite, personalised feed: requirements and architecture, the data model and why feeds need cursor pagination, and the deep dives — virtualization, media, optimistic likes and freshness.
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Design an autocomplete
The method applied to a typeahead: requirements and architecture, the request lifecycle (debounce, cancel, and why the latest query must win), and the accessible combobox keyboard pattern, with live demos.