System Design Interview Practice
Practice system design questions with AI voice mock interviews and FSRS-5 spaced repetition, so the concepts you studied last month are still there when the interview happens.
What System Design Interviews Actually Test
Tradeoffs, not a single right answer
System design interviews score how you reason about scale, consistency, and cost, not whether you land on the one correct diagram.
Talking through your thinking
You explain the design out loud as you build it. Reading about system design and being able to talk through one under time pressure are different skills.
Retaining the vocabulary
Sharding, load balancing, caching layers, consistency models: concepts you studied months ago need to be on tap, not half-remembered.
HireReady's Question Set
System design is one of the three question categories in HireReady's 1,300+ question bank, alongside coding and behavioral. Every system design question goes into the same FSRS-5 review queue as your coding practice, so it gets scheduled for review instead of sitting untouched after the first pass.
AI Voice Mock Interview Walkthrough
Reading about a design and defending it out loud under time pressure are different skills. HireReady's AI voice mock interviews let you talk through a system design question the way you would in the actual room.
Practice out loud
Talk through your design instead of typing it, so the first time you say it out loud isn't in the actual interview.
Tracked with everything else
Voice interview sessions count toward the same progress tracking as your coding and behavioral practice.
Free vs paid
- Free: 20 questions/day, MCQ/fill-in-blank/coding question types, basic progress tracking, 3 AI voice interviews/month
- Job Hunt Pass: $39 one-time for 90 days, unlimited questions, up to 10 AI voice interviews/month, AI study plans
- Lifetime: $199 one-time, 20 AI voice interviews/month
Full details on the pricing page.