Most programming tutorials teach technologies in isolation. You learn a language. Then a framework. Then a database. Then eventually build a small CRUD project. But real systems are not built in isolation. Modern applications are combinations of specialized services, each optimized for a particular responsibility. That realization changed how I approached learning software engineering. My Background I recently completed an intensive introduction to Go and I’m currently transitioning into JavaScript and Node.js. One thing became obvious almost immediately: JavaScript and Go overlap in interesting ways on the backend. At first, this confused me. Why would a system use both? Why not choose one language and use it everywhere? The deeper I looked into production systems, the more the answer made sense.…