Palo Alto Networks·Software Engineer·Onsite - System Design / Architecture
- Design a metrics monitoring system.
“Spent the first few minutes just trying to nail down what kind of metrics we're talking about.”
Large Enterprises
Most of these Palo Alto Networks write-ups come from Software Engineers (28), then Product Managers (2) and Backend Engineers (1). The most reported rounds are the technical phone screen (10), the system design round (8), the onsite coding round (4) and the product sense round (4).
31 interview notes · updated Sep 2026
“Spent the first few minutes just trying to nail down what kind of metrics we're talking about.”
“This was the whole interview basically.”
“I went with sliding window counter because it smooths out burst traffic better than fixed window without the memory cost of a full log.”
“My first instinct was to go broad and just list channels, which was probably the wrong move.”
“LeetCode 88.”
“I knew it was an LRU cache the second they finished the sentence, which was both reassuring and a trap because I rushed into code before properly explaining the structure.”
“This is where things went sideways for me.”
“I started with target audience segmentation which felt right, but I think I spent too long on that and rushed the channel strategy.”
“This one looked manageable at first glance but the complexity stacks up fast.”
“This is the one that tripped me up a bit.”