Developer Builds AI Interview Prep Tool Using Gemini API and MERN Stack

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A developer created PrepAI, an AI-powered interview preparation platform, out of frustration with generic job-search advice. The tool analyzes a user's resume against a specific job description to generate a match score, skill-gap breakdown, personalized interview questions, and a 7-day study roadmap. Built on the MERN stack, the platform uses Google's Gemini API to handle the core reasoning and analysis tasks. The developer noted that the biggest technical challenge was engineering prompts that returned consistent, structured JSON output rather than unpredictable freeform text. PrepAI is currently live on Vercel, with its source code publicly available on GitHub.

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