Loopy - Technical Interview Preparation Assistant

An open-source study assistance tool for software engineers preparing for technical interviews. Loopy simulates realistic interview experiences with AI-driven questions and feedback.

Features

• Interactive Technical Interviews: Experience realistic interview practice with AI-driven questions and feedback
• Text-Based by Default: Type your answers for maximum accessibility and ease of use
• Optional Voice Mode: Switch to voice mode for a more immersive experience with speech input/output
• Real-time Feedback: Receive detailed evaluation and feedback on your responses
• Multiple Technical Topics: Choose from a wide range of software engineering topics
• Open Source: Free to use and contribute to

How It Works

Text Mode (Default)

1. Select a Topic: Choose from various technical areas like algorithms, system design, networking, etc.
2. Read the Question: The AI interviewer presents you with a technical question
3. Type Your Answer: Respond to the question in a text box
4. Get Feedback: Receive an evaluation of your answer with specific feedback and improvement suggestions
5. Continue the Interview: Answer follow-up questions or request a new question

Voice Mode (Optional)

1. Enable Voice Mode: Click the voice mode toggle in the header
2. Listen to Questions: The AI interviewer asks you questions using text-to-speech
3. Respond Verbally: Record your answer by speaking naturally
4. Get Feedback: Receive the same detailed evaluation and feedback
5. Continue the Interview: The conversation flow works the same as text mode

Implementation Plan

Phase 1: Core Interview Structure ✅

• Create project foundation with Next.js
• Design the interview interface
• Implement the Q&A flow
• Set up question generation and answer evaluation

Phase 2: Text Mode & UI Refinement

• Implement text-based input/output as default
• Improve visual feedback during different interview stages
• Add interview timers and progress tracking
• Create user dashboard for tracking progress
• Implement accessibility features

Phase 3: Voice Mode Support

• Add optional voice mode with speech recognition and synthesis
• Create toggle for switching between modes
• Ensure graceful fallbacks when permissions or browser capabilities are limited
• Optimize voice interaction experience

Phase 4: Advanced Features

• Add difficulty levels for questions
• Implement interview session scoring
• Create personalized improvement recommendations
• Add coding-specific interview modes

Example Questions

Loopy includes questions covering topics such as:

• System Design:

  • How would you handle 100,000,000,000 file updates?
  • How would you design a system to store 100TB of data?

• Networking:

  • What's the difference between TCP and UDP?
  • Explain how DNS resolution works

• Concurrency:

  • What's the difference between a mutex and a semaphore?
  • Explain deadlocks and how to prevent them

• Databases:

  • NoSQL vs SQL databases - when would you use each?
  • Explain database indexing and its importance

• Infrastructure:

  • What are the differences between containers and VMs?
  • Explain the concept of infrastructure as code

Technical Stack

• Frontend: Next.js with React and TypeScript
• Styling: Tailwind CSS for responsive design
• AI Integration: Integration with Groq API for question generation and answer evaluation
• Speech Processing (optional):
  • Web Speech API for text-to-speech
  • Whisper API for transcription
• Deployment: Vercel

Getting Started

# Install dependencies
npm install
# or
pnpm install

# Run the development server
npm run dev
# or
pnpm dev

Open http://localhost:3000 in your browser to see the application.

Contributing

Loopy is an open-source project and we welcome contributions! Please feel free to submit a PR or open an issue if you have ideas for improvement.

License

This project is open-sourced under the MIT license.