Vouch Keychain
Cryptographic QR item recovery & real-time telemetry.
SaaS storefront with interactive 3D product preview
System Overview & Engineering Longevity
A web SaaS platform connecting physical hardware QR tags with privacy-preserving communication between finders and owners. When scanned by a finder with a smartphone camera, the system captures location coordinates with browser permission, sends automated alerts (Twilio SMS/Voice + Resend Email) to the owner, and opens a masked communication channel where finders and owners communicate without directly exposing personal contact information.
Key Engineering Highlights
Architected with clean domain separation, strict TypeScript contracts, and automated telemetry logging.
Multi-Channel Alerts
Twilio SMS, Voice & Resend Email
Privacy Protocol
Contact info masked between parties
Modern Framework
Production SaaS deployed on Vercel
Interactive Hardware Store
Custom 3D WebGL material shader
End-to-End System Data Flow
How user inputs, computer vision pipelines, and transaction protocols flow across the stack.
QR Scan Handshake
Finder scans physical QR token; browser handshakes with Vouch short-link router without app install.
Location Capture
Browser requests geolocation permission; coordinates, timestamp, and device metadata are securely recorded.
Alert Dispatch
Server dispatches Twilio SMS, automated Voice call, and Resend email to owner in parallel.
Masked Chat Session
Masked communication channel opens for owner and finder to arrange safe handover without sharing direct contact info.
Recovery & Status Reset
Owner confirms receipt in dashboard; chat session closes and item telemetry resets to protected state.
System Capabilities & 6+ Functional Modules
QR Telemetry & Routing Protocol
Each physical keychain contains a unique QR token. When scanned, the system performs a zero-install browser handshake, logs coordinates with user permission, timestamp, and device user-agent without requiring the finder to download an app.
Identity Masking Layer
Finders are presented with an anonymous recovery portal. The owner personal email and phone number are masked to prevent spam or misuse.
Multi-Channel Alert Dispatch Engine
A notification engine that broadcasts parallel alerts across multiple channels upon a scan event: Twilio SMS, automated Twilio Voice call, and transactional Resend email with location coordinates.
Two-Way Masked Messaging Channel
A secure communication channel created upon scanning. Allows owner and finder to coordinate item handover without disclosing personal phone numbers or messaging handles.
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 metallic reflections and real-time lighting.
Owner Dashboard & Asset Ledger
Asset management dashboard where users register tags, review recovery history, track reported locations on Google Maps, and manage protection plans.
Key Engineering Bottlenecks & Solutions
Zero-Install Location Capture Across Mobile Browsers
Requiring finders to download an application causes high abandonment. Engineered a lightweight web client that requests standard browser geolocation permissions directly upon scan.
Protecting Owner Privacy & Preventing Direct Exposure
Traditional tags print phone numbers directly on physical hardware, exposing owners to harassment. Vouch proxies all communication through a masked messaging bridge, keeping owner phone numbers and emails private.
Multi-Channel Alert Delivery Speed
When an item is found, owners need prompt notification. Parallelized alert dispatch using Promise.allSettled across Twilio SMS, voice, and Resend transactional email to ensure reliable notification delivery.
NutriLens AI
Multimodal vision nutrition & clinical metabolic intelligence mobile engine.