Heygen·Software Engineer·Technical Phone Screen
May 2026
Coding round at Heygen for a software engineer role. One problem, but the real challenge was figuring out what the problem actually was since the interviewer wouldn't clarify anything upfront.
- Given a paragraph string and a list of (substring, annotation) pairs, write a function that wraps every occurrence of each substring in an XML tag using its corresponding annotation. You're expected to surface and resolve edge cases yourself since the interviewer won't bring them up.
“The function itself isn't that bad once you sit down and think about it.” The rest of the author's notes on Software Engineer interview at Heygen, 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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