Lead Deduplication & Conflict Resolution Algorithms in PostgreSQL & MongoDB
Engineering Review: LiveLeads4Less Pipeline Directorate
Selling the same lead to multiple buyers simultaneously creates customer disputes and damages marketplace trust. Database-level deduplication locks ensure absolute exclusivity.
1. High-Performance Deduplication Key Spec
🔑 Normalized Cryptographic Lead Hash
lead_hash = SHA256(normalize_phone(phone) + "_" + lowercase(clean_email(email)))
# Enforce unique index with 30-day TTL expiration in MongoDB / PostgreSQL