Real-time Applications Development

Implementing WebSocket architecture, WebRTC peer connections, and event-driven state synchronisation that empowers your users with realtime communication and collaboration features

Architecture built for concurrency

A few signals that real-time infrastructure is the right call: multiple users editing a shared canvas or document need to see each other's changes in real time, a trading or analytics dashboard where stale prices mean wrong decisions, a customer support tool where agents see what the visitor is typing — or co-browse their session — before a message is even sent, a booking or auction system where availability changes in milliseconds and overselling is not an option, or an AI assistant that needs to stream responses token by token rather than make users wait for completion. When the gap between an event and its display becomes a product quality metric, request-response architecture is the wrong foundation.

This service covers WebSocket and WebRTC architecture, SFU-based multi-party communication, embeddable messaging widgets, and AI-powered chat interfaces. The focus tends to land on the harder problems: state recovery after reconnection, fan-out at scale, and conflict resolution when multiple users touch the same shared state.

Real-time patterns

Not all real-time requirements are the same. The right technology depends on directionality, concurrency, and how much state loss your users can tolerate. Here's how I map use cases to solutions.

Use Case	Technology	Key Engineering Challenge
Chat & Messaging	WebSockets / Socket.io	Message ordering, delivery guarantees, offline queue
Live Collaboration	WebRTC + SFU	Selective forwarding, cursor sync, conflict resolution
Real-time Data Feeds	Server-Sent Events / WebSockets	Backpressure, fan-out at scale, client reconnection
Embeddable Widgets	Iframe + PostMessage	Cross-origin isolation, minimal footprint, host page safety

What clients say

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On Upwork

5.0

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5.0

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