Illumio·Software Engineer

Illumio Software Engineer interview experience

Got offer

Medium

Positive

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

My interview started with two coding interviews that began as a straightforward exercise but quickly became challenging once extra constraints were layered in.

The problem was essentially a log aggregator: for each incoming log line, determine which HTTP verb (GET/PUT/POST/DELETE) appeared most often within a five-minute interval. I remember feeling like the core idea was simple at first, then the added constraints forced me to think much more carefully about state and efficiency.

After the coding, I went into two project deep dives. The first one focused on redesigning the system I had previously built but with a bunch of new constraints introduced during the conversation. That meant I had to revisit earlier decisions and justify them rather than

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