3 free reviews. 3 deep dives. No card.

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• ✓3 free code reviews and 3 free Bug Hunt exercises. No card required.
• ✓3 system design deep dives, free to read
• ✓AI-graded against a hand-authored senior-engineer rubric
• ✓Each exercise shows its available languages. Most support Go, Kotlin, Python, Java, and C#.