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Cloudflare Software Engineer Onsite Coding Questions

5+ questions from real Cloudflare Software Engineer Onsite Coding rounds, reported by candidates who interviewed there.

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Questions
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What does the Cloudflare Onsite Coding round test?

The Cloudflare onsite coding round is the core technical evaluation. Software Engineer candidates typically see 2-3 algorithm and data structure problems. Problems range from medium to hard difficulty, and interviewers evaluate both correctness and code quality.

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Cloudflare Software Engineer Onsite Coding Questions

LeetCode #622: Design Circular Queue. Difficulty: Medium. Topics: Array, Linked List, Design, Queue. Asked at Cloudflare in the last 6 months.

LeetCode #1381: Design a Stack With Increment Operation. Difficulty: Medium. Topics: Array, Stack, Design. Asked at Cloudflare in the last 6 months.

LeetCode #23: Merge k Sorted Lists. Difficulty: Hard. Topics: Linked List, Divide and Conquer, Heap (Priority Queue), Merge Sort. Asked at Cloudflare in the last 6 months.

LeetCode #207: Course Schedule. Difficulty: Medium. Topics: Depth-First Search, Breadth-First Search, Graph Theory, Topological Sort. Asked at Cloudflare in the last 6 months.

LeetCode #359: Logger Rate Limiter. Difficulty: Easy. Topics: Hash Table, Design, Data Stream. Asked at Cloudflare in the last 6 months.

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