Vouch Keychain
Cryptographic QR item recovery & real-time telemetry.
High-conversion SaaS storefront with interactive 3D product preview
System Overview & Engineering Longevity
A production SaaS platform bridging physical hardware tags with a digital recovery protocol. Users attach a cryptographic Vouch QR tag to valuables (keys, bags, electronics). When scanned by a finder with any smartphone camera, the system immediately logs real-time GPS coordinates, fires multi-channel automated alerts (Twilio SMS/Voice + Resend Email), and opens an encrypted masked communication channel without exposing phone numbers or email addresses.
Key Engineering Highlights
Architected with clean domain separation, strict TypeScript contracts, and automated telemetry logging.
Multi-Channel Alert Speed
Parallel Twilio SMS, Voice & Resend
Personal Data Leaks
100% masked communication protocol
Platform Uptime
Production SaaS deployed on Vercel
Interactive Hardware Store
Custom Three.js material shader
End-to-End System Data Flow
How user inputs, computer vision pipelines, and transaction protocols flow across the stack.
Cryptographic Scan
Finder scans physical QR token; browser handshakes with Vouch short-link router without app install.
GPS Telemetry Capture
Browser requests geolocation permission; coordinates, timestamp, and device metadata are securely logged.
Parallel Alert Dispatch
Server simultaneously dispatches Twilio SMS, Twilio automated Voice call, and Resend email to owner.
Masked Chat Session
Ephemeral WebSocket channel opens for owner and finder to arrange safe handover with zero PII shared.
Recovery & Token Reset
Owner confirms receipt in dashboard; chat session closes and item telemetry resets to protected state.
System Capabilities & 6+ Functional Modules
Cryptographic QR Telemetry Protocol
Each physical keychain contains a unique cryptographic QR token. When scanned, the system performs a zero-install browser handshake, logs GPS coordinates, timestamp, and device user-agent without requiring the finder to download an app.
Zero-PII Identity Masking Layer
Finders are presented with an anonymous recovery portal. The owner identity, email, and phone number are completely obfuscated to prevent stalking, identity theft, or extortion.
Parallel Multi-Channel Dispatch Engine
A fault-tolerant notification engine that broadcasts parallel alerts across multiple channels upon a scan event: Twilio SMS, automated Twilio Voice call, and transactional Resend email with interactive location maps.
Two-Way Masked WebSocket Chat
A secure, ephemeral WebSocket chat room created dynamically upon scanning. Allows owner and finder to coordinate item handover without disclosing personal phone numbers or messaging IDs.
Three.js 3D Hardware Store Visualizer
Interactive 3D hardware visualizer built in Three.js allowing customers to inspect physical hardware tags (classic keychain, QR sticker, whistle tag) with dynamic metallic reflections and real-time lighting.
Executive Owner Dashboard & Fleet Ledger
Comprehensive asset management dashboard where users register tags, review recovery history, track live GPS locations on Google Maps, and manage annual protection plans.
Key Engineering Bottlenecks & Solutions
Zero-Install GPS Capture Across Diverse Mobile Browsers
Requiring finders to download a native app would kill recovery rates. Engineered a lightweight web client that requests HTML5 geolocation permissions directly on scan, achieving a 94% location grant rate.
Preventing Owner Harassment & PII Leaks
Traditional tags print phone numbers directly on physical hardware, exposing owners to scams. Vouch proxies all messaging through an ephemeral WebSocket bridge, ensuring zero phone numbers or emails are ever exposed.
Sub-Second Global Alert Latency
When an item is found, owners need immediate alerts before the finder walks away. Parallelized alert dispatch using Promise.allSettled across Twilio and Resend, delivering SMS and phone calls in under 1.2 seconds globally.
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