🎬 Code Reels

Free technical interview prep that actually works
1000+ questions • 30+ topics • AI-powered learning

🚀 Try it now • Features • Practice Modes • Get Started

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✨ Features

Feature	Description
📱 Swipe Learning	TikTok-style cards. One concept per swipe.
🎤 Voice Interview	AI interviewer with real-time speech recognition
🧠 Spaced Repetition	Science-backed SRS review scheduling
🔍 Semantic Search	Vector DB powered similarity matching
💻 Coding Challenges	In-browser editor with Python & JavaScript
📝 Channel Tests	20-question quizzes with adaptive difficulty
🎓 Certification Prep	25+ tracks (AWS, K8s, Terraform, Azure, GCP)
🏆 Gamification	50 levels, 40+ achievements, XP, streaks
📊 Adaptive Learning	RAG-based personalized question selection

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🎯 Practice Modes

Swipe Learning

Browse questions like social media reels. Reveal answers with a tap. Track progress per channel.

Voice Interview

Practice speaking your answers out loud. Real-time speech recognition tracks your words and auto-stops when you've covered the key points.

Training Mode

Read & record answers with progressive reveal. Answers split into ~30 word segments for manageable practice.

Channel Tests

20-question quizzes per topic with:

• RAG-based progressive question selection
• Adaptive difficulty based on performance
• Pass status that expires when new content is added
• Shareable badges on completion

Certification Practice

Focused prep for 25+ industry certifications:

Provider	Certifications
AWS	SAA, SAP, DVA, SysOps, Security, Database, ML, Networking
Kubernetes	CKA, CKAD, CKS
HashiCorp	Terraform Associate
Google Cloud	ACE, PCA
Microsoft	AZ-900, AZ-104, AZ-305
CompTIA	Security+, Linux+
Cisco	CCNA

SRS Review Sessions

Spaced repetition reviews with 4-button rating (Again, Hard, Good, Easy). Questions resurface at optimal intervals.

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🤖 AI Pipeline

Fully automated content generation and quality control:

┌─────────────────────────────────────────────────────────────────┐
│                    AI CONTENT PIPELINE                          │
├─────────────────────────────────────────────────────────────────┤
│                                                                 │
│  Creator Bot ──► Quality Gate ──► Vector DB ──► Live Content   │
│       │              │               │                          │
│       │         ┌────┴────┐    ┌─────┴─────┐                   │
│       │         │ Checks: │    │ Features: │                   │
│       │         │ • Dups  │    │ • Embed   │                   │
│       │         │ • Fit   │    │ • Search  │                   │
│       │         │ • Score │    │ • Similar │                   │
│       │         └─────────┘    └───────────┘                   │
│       │                                                         │
│       └──► Verifier Bot ──► Processor Bot ──► Improved Content │
│                                                                 │
└─────────────────────────────────────────────────────────────────┘

Daily Automation

• 00:00 UTC — Question generation bot
• 06:00 UTC — Question improvement bot
• 12:00 UTC — Deduplication bot

Vector Database (Qdrant)

Operation	Use Case
vector:sync	Index all questions
vector:search	Semantic search
vector:duplicates	Find near-duplicates
vector:similar	Pre-compute related questions

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🏗️ Architecture

├── client/                 # React 19 + TypeScript + Tailwind
│   ├── src/
│   │   ├── pages/         # 20+ route components
│   │   ├── components/    # Reusable UI (unified design system)
│   │   ├── hooks/         # Custom hooks (SRS, adaptive, voice)
│   │   ├── context/       # Achievement, credits, rewards, theme
│   │   └── lib/           # Utilities, configs, data loaders
│
├── script/                 # Build-time automation
│   ├── bots/              # Creator, verifier, processor, test builder
│   └── ai/                # LangGraph pipelines, vector services
│
└── server/                 # Express (dev only)

Tech Stack

Layer	Tech
Frontend	React 19, Vite 7, Tailwind 4, Framer Motion
UI	Radix primitives, shadcn/ui components
Search	Pagefind (static), Qdrant (semantic)
AI	LangGraph, TF-IDF embeddings
Database	Turso (SQLite edge), Qdrant Cloud
Testing	Playwright E2E
Deploy	GitHub Pages (static)

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🚀 Getting Started

Use Online

open-interview.github.io — No signup needed.

Run Locally

git clone https://github.com/open-interview/open-interview.git
cd open-interview
ppnpm install
pnpm dev

Environment Setup

cp .env.example .env

Required for AI features:

TURSO_DATABASE_URL=libsql://...
TURSO_AUTH_TOKEN=...
QDRANT_URL=https://...qdrant.io:6333
QDRANT_API_KEY=...

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📦 Scripts

Command	Description
pnpm dev	Start dev server (port 5001)
pnpm build:static	Build for GitHub Pages
pnpm test	Run Playwright E2E tests
pnpm vector:sync	Sync questions to Qdrant
pnpm bot:all	Run all content bots

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⌨️ Keyboard Shortcuts

Key	Action
↑ ↓	Navigate questions
→	Reveal answer
Esc	Go back
Cmd+K	Search
T	Toggle theme

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📊 Topics

Category	Topics
🏗️ Engineering	System Design, Algorithms, Frontend, Backend, Database
☁️ Cloud	AWS, Kubernetes, Terraform, Docker, GCP, Azure
🔒 Security	Security, Networking, Linux
🤖 AI/ML	Machine Learning, Generative AI, Data Engineering
🧪 Testing	Unit, E2E, API, Performance
👥 Soft Skills	Behavioral, Engineering Management

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🤝 Contributing

PRs welcome! See CONTRIBUTING.md.

Areas of interest:

• New questions & topics
• UI/UX improvements
• AI pipeline enhancements
• Test coverage

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📜 License

MIT — Use it however you want.

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Built for devs, by devs 💜
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