The 30-Minute System Design Warm-Up Before an Onsite
A 30-minute checklist to run the morning of a system design interview so you walk in warm instead of cold.
system-designinterview-prepengineering
Pat•
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26 articles tagged System Design - interview prep, system design, and career guidance.
A 30-minute checklist to run the morning of a system design interview so you walk in warm instead of cold.
How to show an interviewer you can design systems that survive failure, with concrete failure modes to raise and a script for the conversation.
A practical method for turning a vague design prompt into real numbers for traffic, storage, and bandwidth so you can defend your design choices.
A practical guide to picking SQL or NoSQL in a system design interview, what tradeoffs to name out loud, and the mistakes that cost you points.
A plain explanation of consistent hashing - the problem it solves, how the hash ring works, why virtual nodes matter, and how to talk about it in an interview.
Most candidates draw a load balancer box and move on - here is what to actually know about L4 vs L7, algorithms, and health checks so it holds up under follow-up questions.
A practical walkthrough of designing a chat app, covering connections, message delivery, ordering, and storage without leaning on buzzwords.
A walkthrough of the real decisions behind a news feed - fan-out on write vs read, ranking, and caching - and how to reason about them in an interview.
A practical walk-through of how to design a URL shortener in an interview, from clarifying requirements to key generation, storage, and reads.
A plain-English walk through what CAP actually says, why the partition is forced on you, and how to use it in a system design interview without sounding like a flashcard.
Why rate limiting is an easy system design topic to learn well, and what to actually say about it in an interview.
A practical look at what message queues actually solve, when to reach for one, and the tradeoffs that come with adding one to your system.
A practical walkthrough of what database sharding is, the tradeoffs interviewers care about, and how to talk about it without overreaching.
A practical guide to caching as the first thing to reach for in system design, covering where to put a cache, how to keep it fresh, and the failure modes interviewers actually probe.
AI system design is now its own interview round. Here are the questions you'll face on LLM inference platforms, RAG pipelines, semantic search, KV caching, batching, and evals - and how these rounds differ from classic system design.
The 30 system design questions that come up most in 2026, with senior-level model answers covering the framework, core concepts, and classic design prompts.
What Google's system design rounds actually evaluate at L4, L5, and L6 - structure, scoring rubric, the Google-specific quirks, a worked example, and the pitfalls that downlevel strong candidates.
The Staff loop is not a harder Senior loop. It is a different loop. Here is what the Staff interview actually evaluates, what the rounds look like, and where smart Senior engineers fall down.
Everyone preps system design. Almost nobody preps low-level design - and then they freeze when the interviewer says 'design a parking lot.' Here's the framework that turns LLD from a guessing game into a script.
Frontend engineers get a system design round too - and it's nothing like the backend one. No load balancers and shards. Instead: component architecture, state, rendering, and performance. Here's how it works.
Most system design interviews are not failed on knowledge. They are failed on three process mistakes that are completely avoidable once you know to watch for them.
The 50 system design questions you'll actually face in 2026 - from designing a URL shortener to architecting an LLM serving platform. Includes the patterns interviewers expect you to name.
MLOps interviews in 2026 are not about knowing what MLflow is. They are about whether you can operate an AI system in production - feature stores, serving, evals, observability, cost. 35 real questions with answers that reflect what interviewers at top AI teams are looking for.
The 15 system design patterns that come up in almost every interview. Load balancing, caching, sharding, message queues, and more - with when to use each one.
A complete roadmap for system design interviews - from understanding the format to designing real systems under pressure. No CS degree required.
Think system design is only for senior engineers? Here's why a generalist foundation matters more than niche expertise early in your career.