Ace your systems design interviews
Systems design interviews may be nervewracking, but it doesn't have to be that way. Practice makes perfect.
Design a news feedAttempt 2Senior barTools to help you prepare efficiently
Pick a question from a carefully-curated bank
The Systematic team has selected representative questions to help you nail whatever problems comes your way on interview day. Or practice your own custom question.
Your write path is clear. I don’t see a number anywhere — how much storage does a year of this take?
~1.2KB per post × 400M/day × 365 ≈ 175TB before replication.
Good. So which of those two databases is the one that hurts, and what do you shard it on?
Design it live, on the clock
A real whiteboard, seeded with a recommended delivery framework, and a clock counting down to help you practice under a realistic interview setting.
An AI-enabled mock interviewer periodically reads your Excalidraw diagram and generates followups where detail is thin or changes are needed.
Get graded and get better
Systematic grades your interview sessions the way a real interviewer would—and then gives you conceptual areas to revisit and delivery tips to improve on.
Preparation tools you'll actually use, priced for less than what you spend on coffee
Frequently asked questions
Why not just ask an assistant like ChatGPT or Claude to mock interview me?
You can, but you end up assembling the interview yourself: a drawing tool in one tab, a question you thought up, and a chatbot that grades against whatever bar it invented that day. Systematic puts the whiteboard, the question bank, the clock and the grading in one place, on rubrics our team wrote around what system design interviewers actually score you on.
How does using Systematic compare to live mock interview services?
A live mock costs hundreds of dollars and has to be scheduled around someone else's calendar, so most people do one or two. Systematic is available whenever you have 45 minutes, for a fraction of that, and still does the part that makes a mock worth it: it reads your board as you work, asks follow-ups where the detail is thin, and points out design flaws you would otherwise take into the real thing.
Is the rubric fixed, or does the model invent one each time?
The five axes are fixed in code, one set per track. What gets generated is the band descriptors for a given question and level, so "Solid" on a rate limiter means something concrete and different from "Solid" on a payment ledger. Every point in the report is attached to an axis and a justification.
What levels of engineers is Systematic suitable for?
All levels ranging from interns to Staff+ engineers can get value from using Systematic. Each level has its own expectations and rubrics for the same question. Systematic's grading report provides a hire/no-hire recommendation and the level you actually performed at, next to the one you aimed for.
Does it cover AI and ML system design?
It is a full track with its own five axes: framing and metrics, data and features, modeling and retrieval, serving architecture, and evaluation. Questions include RAG over enterprise docs, feed ranking, fraud detection and LLM serving.
Walk in knowing exactly how you’ll spend the 45 minutes.
Your first session takes three quarters of an hour and ends with a score, your pacing, and the two things to sharpen before the next one. Do it tonight.
Practice a free mock interview