Day 129 of 133

Behavioral: tech leadership + project deep-dive

Walk through your hardest ML system. Trade-offs you considered AND rejected.

DSA · NeetCode Stack

Evaluate Reverse Polish NotationDSA · Stack
Interview questions to prep
1. Why a stack here — what LIFO property does the problem exploit?
2. If this uses a monotonic stack, state the monotonic invariant and how it's restored on each push.
3. Walk through complexity: each element is pushed and popped at most once, so the total work is O(n).

Project deep-dive: structure & narrativeBehavioralLenny's Newsletter
Interview questions to prep
1. Walk me through the most complex ML system you've shipped.
2. What were the trade-offs you considered, and what did you NOT build?
Influence: convincing leadership of an ML investmentBehavioralAmazon LPs
Interview questions to prep
1. Tell me about a time you convinced leadership to invest in an ML platform.
2. Describe a time a senior leader pushed back on your proposal — how did you handle it?
Cross-team / cross-org collaborationBehavioralAmazon LPs
Interview questions to prep
1. Describe a project that required deep alignment across teams — what did you do?
2. Tell me about a time another team's incentives conflicted with yours, and how you got to a shared outcome.

References & further reading