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Deep dives into system design, distributed systems, and software engineering best practices.

ML System Design: What Changes When a Model Produces the Answer

Four things change when a machine learning model sits in the request path: training and serving split apart, correctness becomes a measured score, features must match in both places, and cost per request becomes a design constraint.

Aug 27, 2026

System Design Interview Questions by Company

Companies ask design questions shaped like the systems they already run. Here is the question to expect at twenty-two companies, the reason behind each match, and the four decisions that appear in every round.

Aug 27, 2026

How to Prepare for a System Design Interview in Four Weeks

Four weeks is enough time if you spend only one of them reading. A week-by-week plan: building blocks first, then case studies, then practice out loud, then depth on your weak areas. Includes the daily time budget and what to skip.

Aug 8, 2026

System Design Interview Questions, Organized by Difficulty

System design questions fall into three levels. The topic does not set the level, the number of separate problems inside the question does. Here are the common questions at each level, what each level tests, and the order to practice them in.

Aug 8, 2026

System Design Interviews: What Actually Matters (And What Doesn't)

A working framework for system design interviews — what interviewers really evaluate, the four-step structure that holds up under pressure, and the trap most candidates fall into.

May 4, 2026