Nexus CRM

1Challenge

The original NestJS architecture hit scaling walls with real-time collaboration — WebSocket connections under load caused cascading failures, and Node.js single-threaded limitations bottlenecked concurrent operations across distributed teams.

2Solution

Migrated the entire backend from NestJS to Elixir/Phoenix, leveraging the BEAM VM for fault tolerance and Phoenix Channels for real-time collaboration at scale. Ecto handles complex relational queries with PostgreSQL, while Elixir processes manage per-user state with massive concurrency.

3Results

• Migrated from NestJS to Elixir/Phoenix with zero downtime
• Enterprise-scale Elixir codebase with fault-tolerant architecture
• Dramatically increased WebSocket capacity via Phoenix Channels
• AI-powered lead scoring and opportunity detection
• Virtual office with real-time presence tracking