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The Push Delivery Rate Trap: How Global Device Fragmentation Kills User Retention
EngineeringJul 27, 2026

The Push Delivery Rate Trap: How Global Device Fragmentation Kills User Retention

Home > Blog > Push Notification Delivery Guide While industry benchmarks for push opt-in rates hover around 60%, the actual delivery rate in complex, multi-manufacturer markets like Southeast Asia often tells a very different story—frequently dropping below 60% when FCM is deprioritized by OEMs. That gap is where user retention quietly leaks. A message notification that doesn't arrive is a conversation that doesn't resume, an engagement opportunity that disappears, a user who opens

Ryan Yang
Ryan YangNexconn Infrastructure Engineer. Optimizes latency and scales microservices for hundreds of millions of concurrent users. Shares technical deep dives and backend lessons for zero-latency communication.
Implementing Chat End-to-End Encryption (E2EE): A Technical Guide to X3DH and Double Ratchet
EngineeringJun 25, 2026

Implementing Chat End-to-End Encryption (E2EE): A Technical Guide to X3DH and Double Ratchet

Home > Blog > Implementing Chat E2EE Claims of "security" are everywhere, but very few chat APIs actually walk the walk. Most offerings fall apart under a true zero-trust audit because they rely on basic encryption wrappers. Genuinely secure messaging demands much more than simple data-in-transit protection; it requires the cryptographic heavy lifting of X3DH and the Double Ratchet algorithm. To navigate the current maze of data residency laws or shield users from server-side breaches,

Ryan Yang
Ryan YangNexconn Infrastructure Engineer. Optimizes latency and scales microservices for hundreds of millions of concurrent users. Shares technical deep dives and backend lessons for zero-latency communication.
WebSocket vs MQTT: Why Both Fail Modern Chat API Reliability (2026)
EngineeringApr 16, 2026

WebSocket vs MQTT: Why Both Fail Modern Chat API Reliability (2026)

Home > Blog > WebSocket vs MQTT The world of chat is changing faster than ever. For a long time, we all lived in a "Mobile-First" world. If you were building an app, you just wanted a solid Chat SDK so people could send messages on their phones. But today, a great In-app Chat API isn't just for humans anymore. If you want to keep your business running, you need a connection that stays strong and is totally reliable. Let’s dig into why those old ways don't cut it anymore today. The L

Ryan Yang
Ryan YangNexconn Infrastructure Engineer. Optimizes latency and scales microservices for hundreds of millions of concurrent users. Shares technical deep dives and backend lessons for zero-latency communication.
Solving Latency: Best In-app Chat SDK for Emerging Markets (2026)
EngineeringApr 9, 2026

Solving Latency: Best In-app Chat SDK for Emerging Markets (2026)

Home > Blog > Best In-app Chat SDK Whether you are scaling social interactions, AI agents, global gaming ecosystems, or on-demand delivery networks, the cross-border challenge in 2026 has shifted. It’s no longer just about localized content—it’s about the invisible communication infrastructure that keeps every interaction seamless. Let’s be honest: finding a reliable In-app Chat API is easy until you actually try to scale. In the real-world networks of the Middle East and Southeast As

Ryan Yang
Ryan YangNexconn Infrastructure Engineer. Optimizes latency and scales microservices for hundreds of millions of concurrent users. Shares technical deep dives and backend lessons for zero-latency communication.
What is a Chat API? And how to guarantee message delivery on any network?
EngineeringApr 7, 2026

What is a Chat API? And how to guarantee message delivery on any network?

Home > Blog > How to guarantee message delivery A Chat API is the backend engine that powers real-time messaging inside your app. It handles everything from sending a "hi" to delivering rich media, managing group conversations, and syncing messages across devices. But here's the catch: a Chat API is only as good as its ability to deliver every message, on any network, anywhere. And that's where most solutions fall short. To understand why, you need to look at the three transport prot

Ryan Yang
Ryan YangNexconn Infrastructure Engineer. Optimizes latency and scales microservices for hundreds of millions of concurrent users. Shares technical deep dives and backend lessons for zero-latency communication.
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