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JavaScript Interview Mastery: 1000+ Questions from Junior to Senior
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1000+ questions · Junior → Senior
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// EDU · I teach 1000+ developers
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The courses, exam prep, and writing I built from 15+ years of shipping backend systems and 200+ interviews.
// Interview Prep Courses
All courses →Master your next technical interview
1000+ real-world questions organized from junior to senior, built from 200+ interviews I have conducted.
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// Certification
All exams →IT exam prep
Practice questions with detailed explanations for CompTIA and Microsoft certifications. Pass on the first try.
// Writing
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// Architecture
Why I stopped fearing the monolith
Distributed systems are a tax you pay for scale you may never reach. Here is the checklist I run before splitting anything.
May 2026 · 8 min read
// BackendIdempotency keys, dead letters, and other things that save you at 3am
A field guide to message queues for teams who learned the hard way that "at least once" means exactly that.
Apr 2026 · 11 min read
// HiringWhat 200 interviews taught me about senior signal
The questions that actually separate a senior engineer from a confident one - and why most loops miss them.
Mar 2026 · 6 min read
// DatabasesYour Postgres is probably fine - your queries are not
Before you reach for a new datastore, here are the indexes, EXPLAIN habits, and schema choices that buy you years.
Feb 2026 · 9 min read