Most applications begin with a small to medium-sized user base. Even with migration projects, you would not immediately open your new application to the entire existing user base. Instead, you would first test with some internal users, then open up to early adopters. Nevertheless, if your application is successful, at some point you will face the need to scale it. Nevertheless, if your application is successful, at some point you will face the need to scale it.

Keeping up with customer demand and staying ahead of the competition requires fast releases and efficient code. This is where DevOps comes into play. Where DevOps is the practice, mindset, and culture of combining software development (i.e. Dev) and IT operations (i.e. Ops) to accelerate the development lifecycle and provide continuous delivery without compromising quality.

For many software engineers and developers, using standard libraries or built-in objects is just not enough. To save time and increase efficiency, most developers build on work done by others. Whatever the coding problem, there is likely another programmer who has already created a solution for it. There is usually no need to repeat the problem-solving process. This principle is known as Do not Repeat Yourself or DRY.