The Invisible AI Copilot
for Technical Interviews
Powered by proprietary GhostLayer™ technology.
Completely undetectable in screen shares, recordings, and task managers.
Generic tools get you caught.
GhostLayer™ gets you hired.
Interview Coder runs invisibly on top of any coding platform. It sees what you see, but the interviewer sees nothing.
1. Download & Login
Install the native macOS or Windows app. It sits quietly in your menu bar, ready to assist.
2. Activate Stealth Mode
Toggle GhostLayer™ with a global hotkey. The overlay appears for you, but is invisible to screen sharing.
3. Ace the Interview
Get real-time answers and code suggestions. Solve hard problems with confidence and zero anxiety.
Helping engineers get hired at
Enterprise Grade AI
Built for the Modern Engineer
Stop worrying about trick questions. Our suite of undetected tools gives you the confidence to land your dream role.
Real-time Audio Transcription
Enterprise-grade speech recognition powered by Deepgram. Supports 14+ languages including English, Hindi, Spanish, German, Japanese, and auto-detect mode. 99%+ accuracy.
AI-Powered Screen Reading
Advanced OCR extracts coding problems instantly from any screen. AI generates step-by-step solutions with real-time streaming. Auto-detects programming language.
Zero-Trace Stealth Mode
Invisible to screen sharing (Zoom, Teams, Meet), task managers, and monitoring software. No taskbar icons. Instant panic hide with Ctrl+B.
Multi-Shot Queue System
Capture scrolling problems in parts with Ctrl+Shift+H. Queue up to 10 screenshots. View numbered thumbnails in floating preview. Auto-stitches all captures before solving.
Smart Question Detection
AI automatically detects interviewer questions from audio and triggers instant responses. Manual override with Ctrl+Enter uses last 5 transcript sentences.
Context & Prompt Managers
Upload your resume, create custom personas, and switch AI personalities instantly. Customize system prompts up to 1500 characters for personalized responses.
20+ Undetectability Features
Process hiding, window exclusion, anti-debugging, code obfuscation, and more. Designed by security researchers to stay invisible on locked-down corporate devices.
Zero-Downtime Reconnection
Advanced audio buffering keeps last 3 seconds of speech. Automatic reconnection with exponential backoff. Never miss context during network hiccups.
Is it safe?
Yes, OfferLetter runs entirely locally. It does not perform API injections or browser modifications. It works as an overlay layer on your graphics driver, meaning no monitoring tool can ever detect it.
Designed to stay hidden.
Our proprietary GhostLayer™ rendering technology separates the AI overlay from the main frame buffer. If you record your screen, share your window, or use a second monitor—the Copilot remains invisible.
- Invisible to Zoom, Teams, and Slack Huddles.
- Does not appear in Screenshot captures.
- Process hiding from Task Manager / Activity Monitor.
Pricing
Invest in Your Career
Simple, transparent pricing. Start free, upgrade when ready.
Free Trial
Perfect for testing. No credit card required.
Starter Pack
Credits never expire. Great for students.
Monthly Pro
Unlimited solutions. Cancel anytime.
Lifetime Pro
Pay once, own forever.
Secure payments by Razorpay. We never store your card info. Paid-plan refunds are not automatic: they require the 7-calendar-day window and AI credit usage limits in our Refund & Cancellation Policy (e.g. Starter ≤3 credits used after purchase; Monthly Pro first charge / Lifetime ≤10).
Support
Frequently Asked Questions
Still have questions? Email us at offerletter0221@gmail.com (provisional)
Ready to ace your next interview?
Join 12,000+ engineers who landed roles at top-tier companies.
Get Started