xAI onsite applied coding interview
Round 4 of 7 · 11 questions reported
- Format
- Two or three rounds, in person (Palo Alto for many roles)
- They grade
- Whether your first design is modular enough to take new requirements
- Heads-up
- One round can be reading an unfamiliar, partly built codebase (sometimes LLM-related) and filling in a missing piece without tests or specs.
Questions xAI asks in this round 11
- Anthropic OA: leveled in-memory record storeApr 2026 · rarely
- Sort an array with k worker threadsJan 2026 · rarely
- Resumable iterators that save and restore their positionApr 2026 · once
- Per-user token bucket limiter with interval refillsApr 2026 · once
- Backend for a game of checkersJan 2026 · once
- Total listener time per live audio room from an event logJan 2026 · once
- Radix cache for integer sequences with LRU evictionJan 2026 · once
- Key-value store with nested transaction rollbackJan 2026 · once
- K-th largest value over the last N seconds of a streamJan 2026 · once
- Crash-safe on-disk key-value storeJan 2026 · once
- Merge known bigrams in a sentence, leftmost first
About the xAI onsite applied coding round
What does xAI ask in the onsite applied coding round?
The most asked: Anthropic OA: leveled in-memory record store, Sort an array with k worker threads and Resumable iterators that save and restore their position. 11 questions reported in all.
What is the xAI onsite applied coding round like?
Two or three rounds, in person (Palo Alto for many roles). They grade: Whether your first design is modular enough to take new requirements.