Illumio·Software Engineer

Illumio Software Engineer interview experience

No offer

Hard

Positive

Sunnyvale, CAPosted Dec 2025 · Candidate report, summarized by Dataford

My process started with a take-home assignment, which was followed by a technical round centered on a resume deep-dive.

After that, I went through two consecutive rounds that mixed coding with architecture discussions, and then there was a dedicated system design round. The overall arc felt pretty structured: each step built on the last, and by the time I reached the end I was thinking at multiple abstraction levels, not just implementing.

The final onsite portion included hands-on HDD-style discussion plus technical and behavioral questions. The difficulty felt hard overall, and I left with the impression that the bar was high across both implementation and design thinking. I didn’t receive an offer, but the

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