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instant messaging

61 articles · Page 1 of 1
LuTiao Programming
LuTiao Programming
Aug 19, 2026 · Backend Development

Recreating WeChat‑Style Message Recall with Spring Boot: Why Deleting Isn’t the Hard Part

The article walks through building a true WeChat‑like message recall feature in Spring Boot, explaining why simply deleting a row is insufficient and detailing the required status change, concurrency‑safe conditional update, multi‑device session handling, and cross‑instance event propagation.

Conditional UpdateSpring Bootconcurrency control
0 likes · 12 min read
Recreating WeChat‑Style Message Recall with Spring Boot: Why Deleting Isn’t the Hard Part
Random Bulletin
Random Bulletin
Jun 8, 2026 · Industry Insights

Why IM Isn’t Synchronous: Three Immediate Steps to Shift from Chat‑Based Requests to Asynchronous Work

The article explains how using instant‑messaging for direct requests creates costly synchronous communication, contrasts it with asynchronous task links, cites media‑richness theory and remote‑work research, and offers three practical actions—task‑system entry, board‑first view, and long‑form docs—to make collaboration more efficient.

Remote Workasynchronous communicationinstant messaging
0 likes · 10 min read
Why IM Isn’t Synchronous: Three Immediate Steps to Shift from Chat‑Based Requests to Asynchronous Work
macrozheng
macrozheng
Aug 6, 2025 · Backend Development

Build Real‑Time Chat with RabbitMQ MQTT in SpringBoot and Pure Front‑End

This guide explains how to use the lightweight MQTT protocol with RabbitMQ, covering Docker setup, enabling the MQTT plugin, testing with MQTTX, creating a front‑end chat using MQTT.js, and integrating MQTT into a SpringBoot application for server‑side messaging, all without writing custom back‑end code.

DockerMQTTRabbitMQ
0 likes · 13 min read
Build Real‑Time Chat with RabbitMQ MQTT in SpringBoot and Pure Front‑End
macrozheng
macrozheng
Jun 13, 2025 · Backend Development

How to Build a Real‑Time Chat with Spring Boot WebSocket: Step‑by‑Step Guide

This article explains how to integrate WebSocket into a Spring Boot project to create a lightweight instant‑messaging system, covering dependency setup, configuration classes, core server implementation, required modules, common deployment issues, and practical solutions with complete code examples.

Spring BootWebSocketbackend development
0 likes · 14 min read
How to Build a Real‑Time Chat with Spring Boot WebSocket: Step‑by‑Step Guide
Rare Earth Juejin Tech Community
Rare Earth Juejin Tech Community
Jan 21, 2025 · Frontend Development

Tencent IM Overview and Component Design for Instant Messaging Applications

This article provides a comprehensive technical guide on Tencent Cloud's instant messaging (IM) service, comparing UI‑integrated and non‑UI integration approaches, detailing the core chat and input components, their Vue/TypeScript implementations, rendering logic, event handling, and auxiliary features such as file upload simulation, scroll management, and voice/video calling.

TypeScriptVuecomponent design
0 likes · 33 min read
Tencent IM Overview and Component Design for Instant Messaging Applications
Huolala Tech
Huolala Tech
Dec 13, 2024 · Backend Development

Building a Scalable, Secure Customer IM System: Architecture & Key Solutions

This article details the design, architecture, and evolution of a self‑developed customer instant‑messaging system, covering its user‑centred philosophy, layered backend structure, technology choices such as WebSocket and Spring WebFlux, and how it solved challenges in gateway design, session storage, message ACK, and queue management to achieve high availability, security, and future‑ready scalability.

Scalable Designdata securityinstant messaging
0 likes · 14 min read
Building a Scalable, Secure Customer IM System: Architecture & Key Solutions
ITPUB
ITPUB
Nov 8, 2024 · Fundamentals

Why WeChat’s New Linux Client Matters for Developers and the Linux Ecosystem

WeChat has finally released a native Linux client for x86, ARM, and LoongArch architectures, sparking developer enthusiasm, highlighting Qt‑based technical innovations, and addressing long‑standing compatibility challenges that could reshape Linux desktop usage and encourage broader software support.

LinuxQtWeChat
0 likes · 9 min read
Why WeChat’s New Linux Client Matters for Developers and the Linux Ecosystem
Architecture & Thinking
Architecture & Thinking
Oct 10, 2024 · Mobile Development

How Baidu Built a Scalable Android IM SDK for Real‑Time Messaging

This article explains the background, architecture, core processes, and engineering challenges of Baidu's Android instant‑messaging SDK, detailing how the public IM system, long‑connection layer, and modular components enable reliable, real‑time communication across multiple devices.

Android SDKMobile Developmentinstant messaging
0 likes · 21 min read
How Baidu Built a Scalable Android IM SDK for Real‑Time Messaging
macrozheng
macrozheng
Sep 26, 2024 · Backend Development

Build a Real‑Time Chat with Spring Boot WebSocket: Step‑by‑Step Guide

This article explains how to integrate Spring Boot with WebSocket to create a lightweight instant‑messaging system, covering dependency setup, configuration classes, core server code, front‑end integration, essential IM modules, common deployment challenges, and provides complete example code and demos.

Spring BootWebSocketbackend development
0 likes · 15 min read
Build a Real‑Time Chat with Spring Boot WebSocket: Step‑by‑Step Guide
Baidu Geek Talk
Baidu Geek Talk
Sep 16, 2024 · Mobile Development

Design and Implementation of Baidu Android IM SDK and Public IM System

Baidu built a unified Android IM SDK and public instant‑messaging system that consolidates login, message routing, synchronization, notifications, and group chat into reusable client and server components, using a hybrid push‑pull model to deliver real‑time, secure communication while dramatically lowering development and maintenance costs across its product portfolio.

Android SDKMobile Developmentinstant messaging
0 likes · 22 min read
Design and Implementation of Baidu Android IM SDK and Public IM System
IT Services Circle
IT Services Circle
Aug 13, 2024 · Backend Development

Implementing Pull‑Down Pagination for Instant Messaging History

This article explains the challenges of loading historical chat messages in an instant‑messaging app and demonstrates why traditional offset pagination fails, then introduces cursor‑based pagination with SQL examples and best‑practice guidelines for reliable incremental loading.

BackendCursor PaginationSQL
0 likes · 7 min read
Implementing Pull‑Down Pagination for Instant Messaging History
macrozheng
macrozheng
May 28, 2024 · Backend Development

Build Real‑Time Chat with RabbitMQ MQTT and Zero Backend Code

This guide explains how to enable MQTT support in RabbitMQ, use MQTTBox and MQTT.js for instant messaging, and integrate MQTT into a SpringBoot application, providing step‑by‑step commands, code snippets, and configuration details for both front‑end and back‑end developers.

MQTTMessage BrokerRabbitMQ
0 likes · 15 min read
Build Real‑Time Chat with RabbitMQ MQTT and Zero Backend Code
21CTO
21CTO
May 26, 2024 · Fundamentals

Why Is ICQ, the Original Instant Messenger, Shutting Down in 2024?

ICQ, the pioneering instant messaging platform that once boasted over 100 million users, announced its shutdown on June 26, urging users to migrate to VK Messenger, while reflecting on its historic rise, influence on Chinese services like QQ, and multiple ownership changes over nearly three decades.

ICQQQinstant messaging
0 likes · 4 min read
Why Is ICQ, the Original Instant Messenger, Shutting Down in 2024?
Architecture & Thinking
Architecture & Thinking
Apr 21, 2024 · Backend Development

How to Ensure Reliability, Ordering, and Security in Billion‑User IM Systems

This article explores the key challenges of building a large‑scale instant‑messaging service—including message reliability, ordering, read‑sync, data security, avalanche effects, and weak‑network handling—and presents practical architectural and algorithmic solutions for each problem.

Message reliabilitybackend architecturedata security
0 likes · 21 min read
How to Ensure Reliability, Ordering, and Security in Billion‑User IM Systems
Java Architect Essentials
Java Architect Essentials
Feb 29, 2024 · Backend Development

Building a Real‑Time Chat System with Netty, SpringBoot, and JavaFX

This article walks through the design and implementation of a three‑tier instant‑messaging platform—including a Netty‑based chat server, a JavaFX client, and a SpringBoot web admin console—covering architecture, protocol design, database schema, key Netty handlers, threading, and authentication details.

JavaFXNettyShiro Authentication
0 likes · 30 min read
Building a Real‑Time Chat System with Netty, SpringBoot, and JavaFX
NetEase Cloud Music Tech Team
NetEase Cloud Music Tech Team
May 25, 2023 · Backend Development

Building Real-Time IM Solutions with WebSocket: A Practical Guide

The guide walks through building a real‑time instant‑messaging system—using a multiplayer monster‑battle demo—to compare polling, long‑polling, SSE and WebSocket, explains the WebSocket handshake and frame format, shows a custom Node.js server implementation, and advises adopting mature IM SDKs for production.

Node.jsSSEWebSocket
0 likes · 23 min read
Building Real-Time IM Solutions with WebSocket: A Practical Guide
Baidu Tech Salon
Baidu Tech Salon
May 10, 2023 · Backend Development

Full Volume Message Push Implementation Based on Public Mailbox at Baidu

Baidu’s full‑volume push system leverages a public‑mailbox architecture that merges a single shared mailbox with users’ private mailboxes during retrieval, enabling low‑disturbance, high‑speed delivery to over 600 million monthly active users while reducing write costs, as demonstrated by three pandemic‑policy messages reaching more than 200 million users within three days.

Baidu appMessage Pushinstant messaging
0 likes · 13 min read
Full Volume Message Push Implementation Based on Public Mailbox at Baidu
NetEase Smart Enterprise Tech+
NetEase Smart Enterprise Tech+
Feb 1, 2023 · Cloud Native

How NetEase Cloud Messaging Powers Global Entertainment Social Apps

This article shares NetEase Cloud Messaging's technical practice for overseas entertainment social solutions, covering market observations, key technical challenges such as unstable overseas networks and security, a four‑layer architecture, and detailed implementations for group chat, interactive live streaming, IM and RTC global deployment.

Cloud-Native Architectureentertainment socialglobal communication
0 likes · 12 min read
How NetEase Cloud Messaging Powers Global Entertainment Social Apps
NetEase Cloud Music Tech Team
NetEase Cloud Music Tech Team
Jan 9, 2023 · Mobile Development

Design and Implementation of a Standardized IM Message Flow Interaction Layer for iOS

The paper presents a customizable, dependency‑injected iOS IM framework that separates message‑flow structure from interaction, defines reusable MessageView components with pluggable size‑strategies and a snapshot cache, and exposes standard service protocols, enabling low‑cost integration, business extensibility, and reduced maintenance across diverse chat scenarios.

UI designiOSinstant messaging
0 likes · 12 min read
Design and Implementation of a Standardized IM Message Flow Interaction Layer for iOS
Top Architect
Top Architect
Jan 5, 2023 · Backend Development

Design and Architecture of a One‑to‑One Instant Messaging System

This article analyzes the functional decomposition, data structures, system architecture, push‑pull mode selection, and message flow of a one‑to‑one instant messaging service, providing practical design guidelines and example Redis/MySQL schemas for building a scalable chat backend.

Redisbackend architectureinstant messaging
0 likes · 13 min read
Design and Architecture of a One‑to‑One Instant Messaging System
HomeTech
HomeTech
Dec 6, 2022 · Backend Development

Design and Optimization of a High‑Performance IM Instant Messaging Platform

This article details the architectural decisions, network protocol choices, message framing strategies, and server‑level optimizations—including Netty adoption, TCP handling, token management, load balancing, NIC queue configuration, and CPU affinity—that enable a scalable, low‑latency instant messaging service supporting millions of concurrent connections.

BackendIMNetty
0 likes · 19 min read
Design and Optimization of a High‑Performance IM Instant Messaging Platform
政采云技术
政采云技术
Oct 11, 2022 · Backend Development

Instant Messaging System Architecture: Synchronization, Storage, and Modern Design

This article explains the evolution of instant messaging systems from traditional to modern architectures, detailing message synchronization and storage mechanisms, inbox/outbox models, read/write diffusion strategies, and the practical implementation using Redis, MongoDB, and MySQL to achieve scalable, reliable communication.

backend architectureinstant messagingmessage synchronization
0 likes · 11 min read
Instant Messaging System Architecture: Synchronization, Storage, and Modern Design
Architecture Digest
Architecture Digest
Sep 7, 2022 · Backend Development

Building a High-Performance Scalable Instant Messaging System with Go and WebSocket

This article guides readers through the design and implementation of a high‑performance, scalable instant‑messaging (IM) system using Go, detailing WebSocket protocol fundamentals, server‑side architecture, authentication, message handling, code examples, and optimization strategies for production deployment.

GoWebSocketinstant messaging
0 likes · 39 min read
Building a High-Performance Scalable Instant Messaging System with Go and WebSocket
High Availability Architecture
High Availability Architecture
Aug 25, 2022 · Cloud Native

The Evolution of Instant Messaging Systems Over the Past Fifteen Years and the Rise of Cloud‑Native IM

Over the past fifteen years, instant‑messaging (IM) systems have progressed through three stages—from early high‑concurrency software, through mobile‑internet and cloud‑based solutions, to modern cloud‑native architectures—highlighting shifting development challenges, the emergence of SDK services, and the technical considerations of multi‑cluster, high‑scale deployments.

Multi-Clustercloud-nativeinstant messaging
0 likes · 17 min read
The Evolution of Instant Messaging Systems Over the Past Fifteen Years and the Rise of Cloud‑Native IM
Zhuanzhuan Tech
Zhuanzhuan Tech
May 18, 2022 · Backend Development

WebSocket Cluster Deployment in a Customer Service IM System

This article explains how a large-scale customer service instant messaging platform uses clustered WebSocket services, Redis, Nginx load balancing, and message‑queue broadcasting to achieve real‑time, reliable message delivery and robust reconnection handling across multiple servers.

NginxWebSocketcluster
0 likes · 7 min read
WebSocket Cluster Deployment in a Customer Service IM System
JavaEdge
JavaEdge
Apr 3, 2022 · Backend Development

Build a Multi‑Platform Instant Messaging System with Netty & Mina

This article introduces an open‑source instant messaging solution for e‑commerce platforms, detailing its server‑client architecture, supported platforms (WebSocket, Android, iOS, desktop), core modules, directory layout, and how to obtain the source code for integration.

instant messagingmulti‑platformopen-source
0 likes · 4 min read
Build a Multi‑Platform Instant Messaging System with Netty & Mina
Tencent Cloud Developer
Tencent Cloud Developer
Mar 4, 2022 · Cloud Computing

Tencent Cloud IM: From QQ to Industry-Leading Instant Messaging

The article chronicles Tencent’s shift from QQ chat to enterprise‑grade Tencent Cloud IM, showing how a former QQ team built a globally‑scaled 2800‑node acceleration network and self‑designed storage and QUIC‑optimized messaging engine to support hundreds of millions of concurrent users, meet data‑sovereignty rules, and drive digital transformation in e‑commerce, automotive, education and other sectors, now serving over 100,000 clients and a billion users.

Cloud ComputingGlobal NetworkIM Technology
0 likes · 12 min read
Tencent Cloud IM: From QQ to Industry-Leading Instant Messaging
Yang Money Pot Technology Team
Yang Money Pot Technology Team
Feb 21, 2022 · Backend Development

Design and Implementation of an Online Customer Service Instant Messaging System

This article details the design and implementation of an online customer service instant messaging system, covering requirements analysis, client‑server network model, HTTP and WebSocket protocols, distributed architecture choices such as routing rules, Redis shared memory, server‑master sync, and message‑queue broadcasting, and explains why Netty was selected as the development framework.

NettyRedisWebSocket
0 likes · 17 min read
Design and Implementation of an Online Customer Service Instant Messaging System
Sohu Tech Products
Sohu Tech Products
May 19, 2021 · Backend Development

Design Principles and Architecture of Large‑Scale Instant Messaging Systems

This article explores core concepts, ID design, read/write fan-out, push‑pull models, and industry implementations for large‑scale instant messaging systems, discussing trade‑offs in message diffusion, unique identifier strategies, real‑time delivery, ordering, unread counts, multi‑device sync, and deployment considerations.

Real-time messagingid generationinstant messaging
0 likes · 23 min read
Design Principles and Architecture of Large‑Scale Instant Messaging Systems
vivo Internet Technology
vivo Internet Technology
May 19, 2021 · Backend Development

Design and Evolution of Vivo Live‑Streaming IM Message System

Vivo’s live‑streaming IM system combines short‑polling and long‑connection techniques, Redis SortedSet storage, priority‑based routing, protobuf compression, and discard strategies to deliver a fault‑tolerant, high‑concurrency messaging backbone that scales with growing traffic and diverse message types.

Redisbackend architectureinstant messaging
0 likes · 20 min read
Design and Evolution of Vivo Live‑Streaming IM Message System
IT Xianyu
IT Xianyu
Mar 31, 2021 · Backend Development

Open-Source Instant Messaging System (CIM) Overview and Features

This article introduces the open‑source CIM instant messaging system, detailing its server‑side architecture based on Netty or Mina, multi‑platform client support (WebSocket, Android, iOS, desktop), core modules, directory structure, and a preview of its console and client interfaces.

CIMNettyWebSocket
0 likes · 4 min read
Open-Source Instant Messaging System (CIM) Overview and Features
Qunar Tech Salon
Qunar Tech Salon
Jan 21, 2021 · Backend Development

Design and Implementation of Qunar's High‑Concurrency Instant Messaging System

The article details Qunar's in‑house instant messaging platform, covering its purpose, protocol choices (XMPP with protocol‑buffer optimization), architecture based on ejabberd, message flow, reliability mechanisms, extensions such as bots and HTTP APIs, as well as extensive system‑level tuning for high‑concurrency TCP connections.

High ConcurrencySystem OptimizationXMPP
0 likes · 15 min read
Design and Implementation of Qunar's High‑Concurrency Instant Messaging System
macrozheng
macrozheng
Oct 12, 2020 · Backend Development

How to Build Real‑Time Chat with RabbitMQ MQTT and Zero Backend Code

This guide explains how to use RabbitMQ's MQTT plugin and MQTT.js to implement instant messaging, covering MQTT protocol basics, enabling RabbitMQ MQTT and Web‑MQTT, using MQTTBox for testing, creating a pure HTML/JavaScript chat client, and integrating MQTT into a SpringBoot application for backend notifications.

MQTTRabbitMQSpringBoot
0 likes · 15 min read
How to Build Real‑Time Chat with RabbitMQ MQTT and Zero Backend Code
ITPUB
ITPUB
Feb 26, 2020 · Mobile Development

How We Built a Scalable Mobile IM System for Travel Apps

This article details the design, architecture, and implementation of a mobile instant‑messaging system for a travel platform, covering data‑channel handling, subscription and UI rendering, message de‑duplication, local push, reconnection strategies, message‑line management, and a migration to WebSocket for improved performance.

WebSocketarchitecturedata channel
0 likes · 16 min read
How We Built a Scalable Mobile IM System for Travel Apps
Mafengwo Technology
Mafengwo Technology
Dec 13, 2019 · Backend Development

How Go‑Powered IM Architecture Boosted E‑commerce Messaging Performance

This article explains how a travel e‑commerce platform rebuilt its instant‑messaging service with Go, separating business logic, introducing a dual‑layer distributed architecture, and optimizing performance and reliability to handle massive concurrent connections and improve overall GMV.

GoWebSocketdistributed systems
0 likes · 16 min read
How Go‑Powered IM Architecture Boosted E‑commerce Messaging Performance
21CTO
21CTO
Nov 10, 2019 · Mobile Development

How We Built a Scalable Mobile IM System for a Travel App

This article details the design and implementation of a scalable mobile instant‑messaging system for a travel app, covering architecture, data‑channel handling, subscription mechanisms, UI rendering, message de‑duplication, local push strategies, reconnection logic, and future upgrades to WebSocket.

WebSocketdata channelinstant messaging
0 likes · 16 min read
How We Built a Scalable Mobile IM System for a Travel App
JD Retail Technology
JD Retail Technology
Oct 25, 2019 · Backend Development

Design and Optimization Strategies for High‑Concurrency Instant Messaging Processing

This article explains how to handle high‑concurrency instant‑messaging scenarios by designing message deduplication, optimizing SQLite write performance with batch inserts and WAL mode, improving query speed with indexes and caching, and reducing UI refresh overhead through delayed and scroll‑aware updates.

Performance OptimizationSQLiteWAL
0 likes · 19 min read
Design and Optimization Strategies for High‑Concurrency Instant Messaging Processing
Programmer DD
Programmer DD
Oct 2, 2019 · Backend Development

How to Build a Reliable, Secure, and Scalable IM Server from Scratch

This article walks through constructing a lightweight instant‑messaging backend, covering version 1.0.0 features, reliability guarantees, application‑level ACK handling, security encryption, database schema for users, relations and offline messages, and storage strategies to prevent duplicate delivery.

JavaSecuritybackend architecture
0 likes · 12 min read
How to Build a Reliable, Secure, and Scalable IM Server from Scratch
Programmer DD
Programmer DD
Sep 29, 2019 · Backend Development

Build a Scalable Instant Messaging Server from Scratch – IM1.0.0 Features Explained

This article walks through constructing a lightweight, feature‑rich instant‑messaging backend (IM1.0.0) that supports one‑to‑one text/file messaging, delivery/read receipts, LDAP login, horizontal scaling via connector and transfer modules, user‑status management with Redis, offline storage using MySQL and message queues, and outlines the overall architecture.

distributed systemsinstant messagingmessage queue
0 likes · 9 min read
Build a Scalable Instant Messaging Server from Scratch – IM1.0.0 Features Explained
MOMOLive Tech Team
MOMOLive Tech Team
Sep 24, 2019 · Backend Development

How Momo Live’s IM Architecture Scaled from V1 to V2

This article examines the challenges of high‑traffic live‑streaming instant messaging, presents the original V1 TCP‑based architecture, explains its performance bottlenecks, and details the redesigned V2 solution that adopts Netty, protobuf, compression, and RPC to dramatically reduce bandwidth and latency while supporting millions of concurrent users.

Protobufbackend architectureinstant messaging
0 likes · 9 min read
How Momo Live’s IM Architecture Scaled from V1 to V2
Alibaba Cloud Developer
Alibaba Cloud Developer
Aug 27, 2019 · Backend Development

Building a Simple IM System with Alibaba Tablestore Timeline: A Step‑by‑Step Guide

This article explains how to model and implement a basic instant‑messaging system using Alibaba Tablestore's Timeline model, covering message storage, relationship management, metadata handling, real‑time notification, multi‑device synchronization, and provides complete Java code examples for each functional module.

BackendData ModelingJava
0 likes · 23 min read
Building a Simple IM System with Alibaba Tablestore Timeline: A Step‑by‑Step Guide
Seewo Tech Circle
Seewo Tech Circle
Aug 9, 2019 · Backend Development

Ensuring Reliable, Ordered, and Duplicate‑Free Messaging in IM Systems

This article explains the stringent reliability requirements of instant messaging—ordered delivery, low latency, no loss, and deduplication—analyzes causes of disorder such as multi‑process and multi‑thread architectures, and presents practical solutions including hash‑based routing, sequential IDs, push‑pull mechanisms, ACK optimization, and distributed ID generation.

Message reliabilitybackend designdeduplication
0 likes · 9 min read
Ensuring Reliable, Ordered, and Duplicate‑Free Messaging in IM Systems
58 Tech
58 Tech
Feb 26, 2019 · Backend Development

Architecture Evolution of the WeChat‑like Instant Messaging Service at 58 Group

The article details the step‑by‑step evolution of the WeChat‑like instant messaging platform at 58 Group, describing how the system transitioned from a simple PHP short‑connection architecture to a layered micro‑service architecture using Java‑based RPC, Go‑based short‑connection services, distributed storage, message queues, and clear separation of storage, logic, and interface layers.

GoPerformance Optimizationbackend architecture
0 likes · 12 min read
Architecture Evolution of the WeChat‑like Instant Messaging Service at 58 Group
Zhuanzhuan Tech
Zhuanzhuan Tech
Feb 15, 2019 · Backend Development

Architecture and Design of ZhaiZhai IM System for a Second‑hand E‑commerce Platform

The article details the design and overall architecture of ZhaiZhai's instant messaging (IM) system, covering product positioning, a four‑layer architecture (user, entry, logic, storage), and analyses of scalability, high availability, reliability, extensibility, and performance, highlighting the use of C++, RPC, MySQL, TiDB, and custom middleware.

C++distributed databasesinstant messaging
0 likes · 13 min read
Architecture and Design of ZhaiZhai IM System for a Second‑hand E‑commerce Platform
Tencent Cloud Developer
Tencent Cloud Developer
Jul 27, 2018 · Mobile Development

Integrating Tencent Cloud Real-Time Audio/Video SDK for Android: A Step-by-Step Guide

To add multi‑person video calling with in‑call text chat on Android, developers register a Tencent Cloud account, obtain an APPID, purchase a low‑cost minute package, import the IMSDK/AVSDK/ILiveSDK/BeautySDK, generate a userSig, initialize and log in the SDK, create or join a room, bind an AVRootView for video rendering, and enable IM messaging, resulting in a functional solution built within a day.

Android SDKTencent Cloudinstant messaging
0 likes · 8 min read
Integrating Tencent Cloud Real-Time Audio/Video SDK for Android: A Step-by-Step Guide
Architecture Digest
Architecture Digest
Jun 28, 2018 · Backend Development

Architecture and High‑Concurrency Optimization Practices of NetEase IM Cloud Service

This article explains the layered architecture, connection management, high‑availability design, security mechanisms, and performance‑boosting techniques of NetEase's instant‑messaging cloud platform, illustrating how the system handles massive concurrent connections and ensures stable, fast, and secure message delivery.

cloud servicesconnection managementinstant messaging
0 likes · 18 min read
Architecture and High‑Concurrency Optimization Practices of NetEase IM Cloud Service
High Availability Architecture
High Availability Architecture
Jun 26, 2018 · Blockchain

Why Instant Messaging Should Not Be Implemented as a DApp on Public Blockchains

The article examines the technical, economic, and security challenges of deploying instant‑messaging services as decentralized applications on public blockchains, argues that a dedicated communication‑focused blockchain is more suitable, categorizes existing blockchain IM projects, and outlines why platform‑level communication requires a specialized chain.

Technologycommunicationdecentralized applications
0 likes · 11 min read
Why Instant Messaging Should Not Be Implemented as a DApp on Public Blockchains
Qunar Tech Salon
Qunar Tech Salon
Jun 26, 2018 · Backend Development

Decentralized Design and Architecture of QTalk Instant Messaging System

This article examines the evolution of QTalk’s instant messaging platform, detailing its original centralized design, the motivations for decentralization, the new architecture with domain and public services, security benefits, deployment strategies, and real-world use cases, illustrating how a scalable, secure IM solution can be built for enterprise environments.

backend architecturedecentralizationdeployment
0 likes · 10 min read
Decentralized Design and Architecture of QTalk Instant Messaging System
Java High-Performance Architecture
Java High-Performance Architecture
Oct 28, 2016 · Backend Development

How LinkedIn Scaled Its Instant Messaging to Hundreds of Thousands of Connections

This article explains how LinkedIn engineered its instant‑messaging service using Server‑Sent Events, Java, Akka, and Play, and details key kernel and system‑level optimizations—such as socket backlog, temporary port exhaustion, and file‑descriptor limits—that enabled each server to handle hundreds of thousands of persistent connections.

AkkaJavaLinkedIn
0 likes · 5 min read
How LinkedIn Scaled Its Instant Messaging to Hundreds of Thousands of Connections
21CTO
21CTO
Nov 6, 2015 · Backend Development

How WeChat & Momo Scale IM: Lessons on Battery, Network, and Custom Protocols

This article analyzes the architectural choices behind WeChat and Momo instant‑messaging services, covering battery and traffic constraints, network reliability, the shift from XMPP to proprietary long/short connections, protocol design with protobuf, and operational strategies for scaling massive user bases.

ProtobufProtocol Designbackend architecture
0 likes · 12 min read
How WeChat & Momo Scale IM: Lessons on Battery, Network, and Custom Protocols
21CTO
21CTO
Oct 24, 2015 · Backend Development

How 58.com Scales 40 Billion Daily Requests: Inside the Bangbang Architecture

This article details how 58.com’s Bangbang system evolved from a traditional IM platform to a massive, multi‑layered architecture handling over 40 billion daily requests, covering its four‑layer design, third‑party integration challenges, client lightweighting, and the push technologies that power its mobile O2O services.

backend developmentinstant messagingmobile O2O
0 likes · 8 min read
How 58.com Scales 40 Billion Daily Requests: Inside the Bangbang Architecture
High Availability Architecture
High Availability Architecture
May 21, 2015 · Backend Development

Understanding Instant Messaging (IM) Architecture, Protocol Design, and Real‑Time Web Chat Implementation

This article explains the fundamentals of instant messaging, its system characteristics, protocol layers (application, security, transport), practical protocol examples, and a detailed real‑time web chatroom design using HTTP long‑polling and backend architecture considerations.

Protocol Designbackend architectureinstant messaging
0 likes · 20 min read
Understanding Instant Messaging (IM) Architecture, Protocol Design, and Real‑Time Web Chat Implementation