Liftoff – AI-Powered Mock Interviews

Liftoff Interviews

Mock Interview Simulator with AI-Powered Feedback


Liftoff is an interview preparation tool that provides AI feedback on your mock interviews.

One-click Deploy

You can deploy this template to Vercel with the button below:

Deploy with Vercel

You can also clone & create this repo locally with the following command:

npx create-next-app liftoff --example ""

Tech Stack + Features

Landing Page

Interview Selection


  • Next.js – React framework for building performant apps with the best developer experience


  • Vercel – Easily preview & deploy changes with git
  • Upstash – Serverless Data Platform (here using serverless Redis for rate limiting)


  • Tailwind CSS – Utility-first CSS framework for rapid UI development
  • Framer Motion – Motion library for React to animate components with ease
  • ImageResponse – Generate dynamic Open Graph images at the edge
  • HeadlessUI – Completely unstyled, fully accessible UI components, designed to integrate beautifully with Tailwind CSS

Code Quality

  • TypeScript – Static type checker for end-to-end typesafety
  • Prettier – Opinionated code formatter for consistent code style
  • ESLint – Pluggable linter for Next.js and TypeScript


How it all works

Liftoff uses FFmpeg to transcode the raw video into MP3. Chrome, Safari, and Firefox all record with different codecs, and FFmpeg is great for standardizing them.

We then send the audio directly to be transcribed by OpenAI’s Whisper endpoint, and then stream feedback from the edge using OpenAI’s gpt-3.5-turbo.



View Github