At 12:05, a customer sends a message. At 12:05:01, they are already waiting for a reply. At 12:05:10 — they leave.
A chat platform is not just a message window. It is a system where every second impacts conversion, retention, and revenue.
When a chat system performs poorly:
- messages arrive with delay;
- conversations are lost;
- operators don’t see users;
- integrations fail;
- businesses lose leads.
Chat Is a Real-Time System
The key requirement is instant message delivery.
- WebSocket connections;
- push-based events;
- low latency.
If a chat works like a traditional API — it’s already too slow.
Core System Components
Any chat platform consists of several layers:
- client applications (web, mobile);
- message server;
- storage system;
- integrations;
- admin panel.
Each layer handles a specific responsibility.
The Heart: Message Delivery
Messages must:
- be delivered instantly;
- never be lost;
- avoid duplication.
This is achieved through:
- message queues;
- event-driven architecture;
- buffering mechanisms.
Message History
Chat is not only real-time — it’s also history.
- conversations;
- media;
- events.
Data must be stored and retrieved quickly.
Integrations
A chat system rarely exists on its own.
- CRM systems;
- payment services;
- bots;
- analytics tools.
This turns chat into a business tool.
Scalability
User growth can be rapid.
- thousands of connections;
- millions of messages;
- traffic spikes.
The system must handle this without delays.
Technology Stack
- Node.js (NestJS) — backend;
- WebSocket — real-time communication;
- Redis — pub/sub;
- PostgreSQL — storage;
- Kafka — message streaming;
- Kubernetes — scaling.
Business Value
- faster communication;
- higher conversion rates;
- full conversation control;
- process integration.
A chat platform is not UI. It is communication infrastructure.
Need a Business Chat Platform?
We build real-time systems that scale and remain stable under load.