AI System Design Interview Assistant

AI for System Design Interviews

System design interviews are the most challenging technical interviews at senior levels. They require discussing architecture, scalability, trade-offs, and deep technical knowledge. GhOst provides real-time suggestions for:

• High-level architecture diagrams
• Database selection and schema design
• Scalability patterns (sharding, caching, CDNs)
• Microservices vs monolith trade-offs
• CAP theorem applications
• Latency and throughput optimization

How GhOst Helps During System Design

System design interviews are conversational — you talk through your design with the interviewer. GhOst delivers suggestions via voice or an on-device text overlay with desktop privacy controls designed for supported capture workflows, so you can incorporate advanced concepts into the conversation. Compatibility varies by platform, capture mode, and version.

What should you practice for system-design interviews?

Use GhOst as a managed-AI preparation partner for turning an ambiguous product prompt into requirements, scale assumptions, interfaces, data ownership, failure modes, and explicit trade-offs. Start from your own notes, code, project history, or a fictional practice prompt. Ask for questions, counterexamples, and critique rather than a polished answer you cannot defend. The useful outcome is a repeatable reasoning process that still works when the interviewer changes the prompt.

A repeatable mock-interview workflow

1. Define the target: record the role, seniority, likely format, time limit, and the evidence or skill the round is designed to assess.
2. Attempt before reviewing: answer once without assistance so the baseline reflects your current reasoning, not an AI-generated response.
3. Request focused feedback: ask GhOst to identify one missing assumption, one weak explanation, one edge case, and one follow-up question.
4. Revise in your own words: produce a shorter second attempt and explain why each material change improves the answer.
5. Repeat under time: return on a later day with a related prompt so you test transfer rather than memorization.

Worked practice exercise

Design a notification service. State the users and delivery guarantees, estimate traffic, draw the main components, choose storage, and explain what happens when a provider or queue is unavailable.

Complete the exercise in three passes: a direct answer, the reasoning or evidence behind it, and a short summary of limitations or next checks. If GhOst suggests a fact, formula, API, or policy, verify it before treating it as correct.

How to review the result

Score the answer from one to five for requirements first, quantified assumptions, coherent boundaries, failure recovery, observability, and justified trade-offs. Keep the review concrete: quote the sentence, calculation, design choice, or code path that supports each score. A lower score is useful when it identifies the next drill.

Responsible use

Use generated diagrams or critiques for mock practice and permitted open-book work. In a live round, follow the interviewer's tool rules and be ready to explain every decision yourself. Preparation, mock interviews, accommodations, take-home or open-book work, and explicitly permitted assistance are the safe default contexts.