Interview prep 9 sites
For the day the recruiter emails.
LeetCode
Free tier covers most FAANG DSA prep. Premium ($35/mo) unlocks company tags. Still standard for junior/mid despite AI-assisted interview shift.
NeetCode
Free NeetCode 150 + Blind 75 + YouTube walkthroughs cover ~95% of patterns. Pro lifetime $219 one-time (no recurring card) is the card-free alternative to AlgoExpert.
System Design Primer
296 open PRs backlog but base content remains the free canon. Anki flashcards included.
ByteByteGo
YouTube channel + newsletter fully free — top free system-design content in 2026. Paid courses optional.
systemdesign.one
Neo Kim's article archive. Solid supplementary reading with clean diagrams.
Exponent
Absorbed Pramp fully by 2024. Peer mocks free after signup. Broader than SWE-only competitors.
HackerRank
Developer side remains strong free option. Question-bank leaks + 2026 ATS controversy dented recruiter trust.
Educative.io
7-day trial no card. GitHub Student Pack unlocks 6mo free — meets card-free rule for students.
HiredInTech
Migrated to static; interactive grading gone but readable course material and system-design canvas remain.