Why Observability is the “Must-Have” Skill for Senior Devs in 2026

Hey fellow devs!

If you’ve looked at job descriptions for Senior Backend roles recently, you might have noticed a recurring theme: Observability. It’s no longer just something the “DevOps guy” handles. It’s becoming a core requirement for everyone building modern software.

The Shift Left of Reliability

In the past, developers would write code, toss it over the wall to Operations, and hope for the best. If something broke, the SRE or DevOps team would investigate. But in a microservices world, this model is too slow.

Why Companies Want “Observability-Aware” Developers

Companies are looking for developers who can take ownership of their code in production. This means more than just writing tests; it means ensuring your code is observable from day one.

As we discussed with Thiago:

Thiago: We used to rely mostly on DevOps and SRE guys. But the problem is that DevOps and SRE are expensive, and not all companies can afford a whole team. A lot of companies are opting to have their backend guys understand observability so they can help understand the application side.

What You Need to Know

To be a truly senior developer today, you should understand:
1. Correlation: How to link a log message to a specific trace ID.
2. Instrumentation: How to add custom metrics that provide business value (like tracking the cost of AI tokens!).
3. Dashboards: How to interpret the data to find patterns before they become outages.

It’s About Career Growth

Understanding the infrastructure side—how your code actually runs and behaves under load—makes you a much more valuable engineer. It allows you to solve complex, distributed problems that others might miss.

Final Thought

Ready to level up? Start by exploring how to add custom traces to your current project. It’s a small step that makes a huge difference in your visibility.

Is observability part of your daily workflow yet? Let me know in the comments!

Happy coding!

Cheers,

Pedro Cavalero