Luma AI interview notes, page 1 of 2

“I knew the brute force immediately, two nested loops, done.” The rest of the author's notes on Machine Learning Engineer interview at Luma AI, Technical Phone Screen round, covers how they worked through the question, what the panel pushed back on, and what they would do differently.

“This one had three distinct failure modes packed into a single scenario and they wanted you to walk through all of them.” The rest of the author's notes on Machine Learning Engineer interview at Luma AI, Technical Phone Screen round, covers how they worked through the question, what the panel pushed back on, and what they would do differently.

“Not what I was expecting from an ML interview.” The rest of the author's notes on Machine Learning Engineer interview at Luma AI, Technical Phone Screen round, covers how they worked through the question, what the panel pushed back on, and what they would do differently.

“The triangle inequality part is straightforward once you remember you need all three checks, not just one.” The rest of the author's notes on Machine Learning Engineer interview at Luma AI, Technical Phone Screen round, covers how they worked through the question, what the panel pushed back on, and what they would do differently.

“I've done the LeetCode transpose before so my first instinct was to just write that solution.” The rest of the author's notes on Machine Learning Engineer interview at Luma AI, Technical Phone Screen round, covers how they worked through the question, what the panel pushed back on, and what they would do differently.

“Brute force is O(n^2) and I knew that wasn't the answer they wanted.” The rest of the author's notes on Machine Learning Engineer interview at Luma AI, Technical Phone Screen round, covers how they worked through the question, what the panel pushed back on, and what they would do differently.

“I knew the formula but fumbled the normalization part at first.” The rest of the author's notes on Machine Learning Engineer interview at Luma AI, Technical Phone Screen round, covers how they worked through the question, what the panel pushed back on, and what they would do differently.

“My first pass just exponentiated everything directly and called it done.” The rest of the author's notes on Machine Learning Engineer interview at Luma AI, Technical Phone Screen round, covers how they worked through the question, what the panel pushed back on, and what they would do differently.

“The imputation part is fine, masking zeros and computing column means is a few lines.” The rest of the author's notes on Machine Learning Engineer interview at Luma AI, Technical Phone Screen round, covers how they worked through the question, what the panel pushed back on, and what they would do differently.

“They handed over the formula so it wasn't a recall test, more about whether you could translate math into clean code.” The rest of the author's notes on Machine Learning Engineer interview at Luma AI, Technical Phone Screen round, covers how they worked through the question, what the panel pushed back on, and what they would do differently.