Frontend Architecture at Scale
Lessons on building component libraries and design systems that thousands of engineers depend on.
This is a sample post. Replace it with your own writing — the structure, frontmatter, and MDX features all work out of the box.
When a component library is consumed by thousands of downstream applications, every decision compounds. A prop rename isn't a refactor — it's a migration for hundreds of teams.
The three constraints
Platform frontend work lives inside three constraints that pull against each other:
- Backward compatibility — you almost never get to make a breaking change cheaply.
- Accessibility — every component must meet WCAG, by default, for every consumer.
- Performance — you're on the critical path of apps you'll never see.
Design for the consumer you can't see
The hardest part of platform work is empathy at a distance. You're designing APIs for engineers whose use cases you can't fully predict.
A few principles that hold up:
- Make the accessible path the default path.
- Prefer composition over configuration flags.
- Treat every public prop as a forever commitment.
Closing
Good frontend architecture is mostly about saying no to complexity on behalf of people who will never thank you for it — but whose apps will be faster and more accessible because you did.