PKPRINCE KUMARinprincekumar-engineer.hashnode.dev·10h ago · 22 min readRealtime Systems: Polling, WebSocket, SSE, and Pub/SubHow does WhatsApp deliver a message instantly? You send a message to a friend. Within a fraction of a second, their phone shows a notification. There is no refresh button. You do not repeatedly ask t00
VPVed Pandeyinvedpandeydev.hashnode.dev·Aug 21 · 12 min readBeyond Refresh: Realtime SystemHow does WhatsApp deliver a message instantly? You send a message, and it your friend's receives that in a fraction of second. No refresh, no waiting. Somehow, the app "knows" the moment new data show10
TDT Dinivibe.hashnode.dev·Aug 16 · 7 min readThree Ways to Deliver Prisma Reads: Pages, POST Queries, and StreamingRead endpoints have different delivery needs. Some need stable page metadata. Some need to carry a query body that does not fit comfortably in a URL. Some can send a root record before relation-heavy 00
SSUPRABHATinblog.suprabhat.site·Aug 12 · 10 min readRealtime Systems: Polling, WebSockets, SSE, and Pub/SubImagine Suprabhat sends a message to a friend. Within a fraction of a second, the message appears on the other person’s phone. No refresh button. No waiting. No manually checking the server again and 31T
MMMostafa Mahmoudinbuildwithmostafa.hashnode.dev·Aug 3 · 18 min readStreaming LLM Tokens Over SSE in Productionبِسْمِ اللَّهِ الرَّحْمَٰنِ الرَّحِيمِ In the name of Allah, the Most Gracious, the Most Merciful. Every "typing" animation in ChatGPT, Claude, and Gemini's chat UIs is the same trick: Server-Sent 00
ASAnik Sikderinaniksikder.hashnode.dev·Jul 27 · 9 min readServer-Sent Events (SSE): When the Web Learned to ListenFor years, the web operated on a simple principle: Browser asks. Server answers. Connection closes. This model worked perfectly when websites were mostly documents. A user opened a page. The browser 00
MMMostafa Mahmoudinbuildwithmostafa.hashnode.dev·Jul 20 · 31 min readHTTP That Never Ends: SSE in Productionبِسْمِ اللَّهِ الرَّحْمَٰنِ الرَّحِيمِ In the name of Allah, the Most Gracious, the Most Merciful. Take a standard HTTP request-response, never finish writing the response, and you get an endless s00
KSKanishka Shashiinhtml-dev09.hashnode.dev·Jul 7 · 17 min readRealtime Systems: Polling, WebSockets, SSE, and Pub/SubThe question that started it all How does WhatsApp deliver a message instantly? You send a message, and it appears on your friend's phone within a fraction of a second — no refresh button, no waiting.10
TOtimothy ogbemudiainfreecodecamp.org·Jun 25 · 10 min readHow to Build a Reliable SSE Client in TypeScriptWhen you build a feature that streams data, like an AI chat response or a live notification feed, the network is rarely as cooperative as fetch makes it look. Connections drop, proxies buffer response00
SMSubramanya M Raoinsubramanyarao.hashnode.dev·May 24 · 9 min readI Built a Full-Stack LLM Observability Platform for a Founding Engineer Take-HomeRepository: github.com/Subramanyarao11/llm-observe This project started as a take-home assignment for a Founding Engineer role — I treated it as a chance to build something I'd actually want in produc10
