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Empower 1,000 engineers to get promoted or land their dream job.

Mike Guoynes. Frontend lead, ex-LaunchDarkly
Frontend lead writing for mid/senior frontend devs who want to ship better systems, interview with confidence, and stop plateauing.
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Course· Module I open now
Stop overthinking UI state.
For engineers who want to avoid useEffect antipatterns and learn the way to cleanly organize production-grade state without over-thinking it.
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- ✦Virtualization, React 19 features, Next.js
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State architecture9 min read
How multiple sources of truth bite you (local vs URL state)
Two parts of the system were deciding the same thing. They stopped agreeing at the worst possible moment.
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What you'll actually learn