Google·Software Engineer·Technical Phone Screen
May 2026
Google SWE interview focused entirely on performance optimization, which sounds straightforward until you're actually in it and realize how many angles they expect you to cover. The question was a single meaty problem but it touched profiling, algorithms, data structures, and Python internals all at once.
- You're given a Python program that produces correct output but runs much slower than expected. Walk through how you'd profile it, identify the bottlenecks, apply fixes, and report the before/after performance improvement.
“This one is deceptively wide.” The rest of the author's notes on Software Engineer interview at Google, Technical Phone Screen round, covers how they worked through the question, what the panel pushed back on, and what they would do differently.
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