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Yayun Jin, Ph.D.ML Engineer at Reddit | Ex-Microsoft & Workday | Mentoring 200+ Engineers into ML Roles

Coding Round Grades

In this segment, we break down what interviewers really look for in a machine learning coding round. It’s not just about solving the problem—it's about how we think, communicate, and write code that reflects real engineering practices.

  • We understand that weak performance stems from messy code, poor use of data structures, or inability to explain complexity.
  • Mediocre performance may reach the right answer but relies heavily on interviewer help, signaling a lack of confidence or strategy.
  • A great performance involves writing clean, efficient code and clearly explaining trade-offs and scalability.
  • To be exceptional, we should offer multiple solutions, consider edge cases, and write production-quality code.
  • We improve by following a systematic approach, thinking out loud, handling edge cases, and prioritizing clean, readable code—just like real ML engineers do in production.

If you want to learn even more from Yayun: