Systems | Development | Analytics | API | Testing

Imagine you’re mechanic trying to fix a car. There’s this magic piece of kit that allows you to pause the engine and see inside every moving part. You can tweak parts live, test changes instantly and measure which parts are slowing the whole thing down. This is JavaScript debugging in Chrome. Using Chrome DevTools, you can pause execution, inspect variables and scope, and follow code as it runs. So you can see what the code is actually doing at runtime, without assumptions.

For years, Angular lived with a subtle contradiction. The framework steadily modernized its reactivity model with signals, fine-grained change detection, and a clearer mental model for component state. Yet forms - arguably one of the most important parts of most applications - continued operating under an older, push-based system built around events and subscriptions. Developers felt this split immediately.

Whenever you place an order on Amazon (or any other e-commerce site for that matter), you get that “order placed successfully” notification almost instantly. But did you know that there’s much more to the whole experience than meets the eye? In Python applications, Celery is the major driver behind the whole thing. The tasks that take time are queued and sent to brokers.

CLIs, MCP, and the Real Governance Tradeoffs Shaping Enterprise AI Agents.

Ever felt like your POS system is doing almost everything you need… but not quite? Perhaps your POS system won't accommodate your unique billing process, has issues at busy times, or requires your employees to change their work processes instead of accommodating those practices. This is the case with most point-of-sale system software that is sold commercially. They are designed for the general public, not for your specific business operations. And businesses are starting to outgrow that limitation.

Python dominates AI development. It's where teams build their agents, orchestration layers, and the backend systems that turn LLM calls into products people actually use. Over the past year, those systems have matured rapidly. What used to live in notebooks and prototypes is now running in production, serving real users with real expectations around reliability and performance. That maturity brings infrastructure requirements. Tokens need to stream in order.

App Clips are one of the most under-appreciated parts of the iOS universe. Introduced with iOS 14 back in 2020, they allow users to sample the best features of an app without having to download it in full. Users explore the Apple ecosystem. Developers broaden their audience. Win-win, right? Well, bizarrely few devs are actually using App Clips right now. A lot of folks think they’re going to be overly complex and full of friction.

Slow Express routes rarely look broken in logs. They just feel sluggish to users. With AppSignal, though, you can quickly identify which endpoints are the slowest, gain insight into each request, and find out if the latency is related to any errors or slow queries. In this guide, you'll set up a mock Express application, create a load, and use AppSignal to analyze a route's performance as if you were working through a live incident.