Series: Your vibe-coded app in production. Safely. Monitored.

Engineer analyzes real-time error data on a holographic interface, guided by her AI-powered robotic cat assistant.

Another critical factor in deploying applications safely is monitoring. When we talk about monitoring at Fixe, we mean the whole picture: informational logs, error logs, audit logs, error reporting, performance metrics, and usage metrics.

Here’s why each one matters — and why they’re a top priority for us at Fixe:

Informational logs: These leave helpful traces showing whether the system is running as expected, if processes started correctly, and any other non-sensitive data that’s useful to the application. We stress “non-sensitive” because logs can sometimes be accessed by people who shouldn’t see certain data. For example, if a hospital stored patient information in its logs, a developer troubleshooting an issue could inadvertently access it and misuse it.

Error logs: These record application errors along with contextual details that help diagnose the root cause. They’re typically generated when an exception is thrown in business logic or when something fails unexpectedly.

Audit logs: These track detailed user activity within the system, which is especially valuable for applications that handle sensitive transactions like banking apps or e-commerce platforms. Audit logs are usually stored in a fast-access database (often a high-performance NoSQL system that can handle large volumes of data).

Error reporting: These tools don’t just log errors; they track how often they occur, add valuable context, and can trigger alerts when errors happen or when their frequency exceeds a set threshold. We typically use external tools for this to ensure fast detection and minimal downtime.

Performance metrics: These show whether your application is hitting performance issues or bottlenecks while processing or fetching data. The more detailed the metrics, the easier it is to pinpoint the problem and fix it efficiently.

Usage metrics: These reveal how much load your system is under so you can manage resources effectively. Key metrics include requests per second, server response times, CPU usage, and memory usage, among others.

The more complex your application, the better you need to set up your metrics.

If your app is having problems and you can’t figure out why, it’s likely that one or more of these monitoring layers is missing or poorly implemented. At Fixe, improving application observability is one of our main priorities because when something goes wrong, being prepared is half the battle.

Errors will happen. But if your system is easy to observe, you’ll diagnose issues faster and fix them more effectively.