Engineering

When a production issue used to come up, I spent more time finding the cause than fixing it. The dashboards, the log queries, the guessing about which customer/cluster/deploy caused it. It didn't matter if it was a 3 a.m. alert or a support question from a customer. Time was lost. We built an AI agent to

A livestream can look perfectly healthy and still get flagged as broken. That's the situation I kept running into on Android, and it took a while to figure out why. I work on the video team at Stream, where I spend most of my time on the Android SDK. Video calls and live streams on Stream use a system called

Step-by-step guide on how to build a fintech app for developers. Covers ledger design, compliance gating, audit logging, PCI scope, and where real-time chat, notifications, and fraud alerts fit in a fintech app, with the code for each decision.

See how Stream's chat architecture delivered 268,000+ events a second on a peak NFL Sunday with zero 5xx errors, and what we still got wrong.

When Zoom first appeared, it seemed almost magical. Before Zoom, video conferencing was a hassle. Skype was all frozen frames, and Google Hangouts degraded fast past three or four participants. Zoom just worked. Without even needing to log in, you could click a link and be in a meeting a few seconds later. It was magical, but none of it was magic.

How Stream's chat, feeds, and video infrastructure is built to hold up under trading-app load, from market open to a widely held stock's earnings release.

Voice assistants like Siri and Alexa are great for non-trivial everyday personal assistive tasks. However, they are limited in providing accurate answers to complex questions, real-time information, handling turns, and user interruptions.

You can vibe code almost anything right now. Describe an app, and a model will build a working interface in minutes. So why hasn't that produced a wave of new companies? We wanted to find out. So we picked one of the hardest products to fake, an AI support concierge, the kind of system that handles millions of customer conversations for companies valued in the billions. Then we tried to build one with a single prompt.