Show HN: Leetsys – Practice system design interviews with an AI interviewer
What happened
LeetSys is a platform that lets users practice system design interviews using an AI interviewer. It offers interactive whiteboard tools where users can sketch architecture, create components, and map data flows. Users can conduct mock interviews through voice or chat, receiving real‑time, seniority‑adjusted feedback on their design choices. The service includes a library of common interview prompts, such as URL shorteners and globally distributed social networks, allowing users to work through a prompt, explain their design, and review feedback while it’s fresh. The AI adapts its questioning and feedback to the user’s experience level.
Why it matters
For readers preparing for technical interviews, this tool provides a way to rehearse design questions without needing a human mock interviewer, potentially improving confidence and performance. It also offers immediate, targeted feedback that can help users identify and fix design weaknesses before real interviews.
Reality check
An automated, sceptical read of the sourceIncremental. The service combines existing interview‑practice concepts with AI assistance, which is an evolution rather than a radical breakthrough.
Is this a big deal?
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