real interview stories, told over a cup of tea ♡
Langchain Interview Experiences
3935 interview stories from candidates at 857 companies: how each round went, what was asked and how it ended. Every company page links to practice questions in the same style.
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- Take-Home Optimization Then Three Onsite Rounds in One DayLangChain · Software Engineer · Senior+ · Onsite · Jun 2026
First I talked with the recruiter, then they gave me a take-home with one week to finish. The take-home was optimizing a benchmark testing setup — there's a POST endpoint and a GET endpoint, using S3 as the database. The version they hand you originally reads the whole JSON out every time and uses string find to look for the offset. The overall speed of the POST was about 20+ seconds, and the goa…