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The
Senior
Frontend
Engineer's
Companion

The reference I wish I had when I started building apps for millions of users.

Last updated December 2025

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Foundations

Build on solid principles. Learn the core concepts that underpin great frontend architecture.

Guides

Not sure which pattern to use? Start with a comprehensive decision guide.

Patterns

Atomic, non-opinionated techniques. Short, factual descriptions of specific implementations.

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What Are Frontend Architecture Patterns?

Frontend architecture patterns are the repeatable design approaches teams use to structure and scale modern web apps, from JavaScript components to full UI systems, while keeping codebases clear, maintainable, and fast.

How to Be a Frontend Architect

New to frontend architecture? Start here to understand the role and mindset.

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