Chats and real-time communication

Delivering production-grade real-time chat systems using WebSocket and WebRTC with focus on security, stability and performance.

Real-time messaging architecture

Real-time chat at scale requires reliable message delivery across disconnects and instant presence updates without server overhead. The system must queue messages when connections drop, persist them reliably, and sync them when the connection returns.

Using technologies like Socket.io for real-time events, WebRTC for peer-to-peer features, and Redis for message persistence, the approach emphasizes connection resilience and efficient presence tracking. This keeps the system stable under load while remaining flexible enough to adapt to your specific requirements.

The approach focuses on reliability and performance at scale. Whether you need a new chat infrastructure or an upgrade to an existing system, the focus remains on minimizing message loss and keeping latency predictable.

Based on your business needs, I can provide a production-grade chat infrastructure for new products or upgrade your existing system with improved reliability and scalability.

Communication use cases

Different services demand different communication strategies. Chat applications, embedded widgets, AI assistants, and video calls each require distinct architecture and optimization approaches.

Communication TypeTypical Use CaseKey Technical Focus
In-app ChatInternal team collaboration, customer supportLow-latency sync, offline resilience, message history
Embedded Chat WidgetCustomer engagement, lead captureSecurity, iframe isolation, quick integration
AI Chat AssistantConversational interfaces, automationsStreaming responses, context management, tool calling
Video CallsReal-time meetings, live supportBandwidth optimization, connection fallback, group management

What clients say

100%
Job Success Rate
On Upwork
5.0
“Great to work with Dmytro - he's a true professional and is very talented. He is responsive, adaptive and really works with the client to make the project successful.”
— Verified Upwork Client
5.0
“Smart and approachable. Good at what he does. Will be working with again and again!”
— Verified Upwork Client
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