Fireworks AI technical phone screen interview

Round 2 of 6 · 2 questions reported

See the whole loop
Format
One or two live coding sessions
They grade
Medium-level coding, sometimes some design
Heads-up
Reported problems: idle intervals across many GPUs, merging intervals of GPU tasks, ordering by a custom alphabet, minimum swaps. Infrastructure roles also get questions on GPU communication, CI/CD and Kubernetes. One candidate got an offer after two screen rounds.

Questions Fireworks AI asks in this round 2

  • Detect security attacks in text logsCodingScan text logs for patterns indicating security attacks and report the offending entries. Reported on 1point3acres' Fireworks AI bank; reconstructed in our own words.
    Last asked Oct 2026
  • Find all GPU idle timesCodingFrom GPU task schedules, compute every idle window where no task runs. Reported on 1point3acres' Fireworks AI bank; reconstructed in our own words.
    Last asked Jan 2026