Technical Interview Preparation: A Realistic Plan

The default technical-prep plan is “grind LeetCode until the heat death of the universe.” Coding fluency matters — but plenty of strong engineers grind for months and still stumble, because the interview tests things LeetCode never does: explaining your thinking, handling design ambiguity, and not freezing when someone's watching.

The four things to cover

• Coding fluency: enough pattern practice that common problem shapes feel familiar. Depth over volume — understanding 50 problems beats half-remembering 500.
• System design: a repeatable framework for open-ended design questions.
• Spoken communication: narrating your approach clearly while you work. This is the most-neglected and highest-leverage skill.
• Behavioral: yes, even for engineers. A story bank for the “tell me about a time” round.

A sane weekly split

If you have a few weeks: roughly half your time on coding patterns, a quarter on system design, and — this is the part people skip — a quarter on doing it out loud. Solve problems while narrating. Explain a design to a wall, a friend, or a mock interviewer. The goal is to make “think and talk at the same time” automatic.

Don't over-index on volume

Five hundred problems half-understood is worse than a hundred you can explain. Interviewers probe; if you pattern-matched your way to an answer you can't reason about, the first “why?” exposes it.

The week before

Ease off cramming and switch to full simulation — timed, out loud, end to end. You're not learning new material now; you're rehearsing performance under pressure so the real thing isn't your first live rep. That single shift is the difference between knowing the material and being able to access it when your heart's pounding.