Programmer - Focus on writing code as the primary activity of software development, often attached with particular programming languages and parts of a whole software solution. In most cases, junior professionals join in a software house as a programmer (well junior programmer you know).
The process of developing and implementing various sets of instructions to enable a computer to do a certain task. These instructions are considered computer programs and help the computer to operate smoothly. The language used to program computers is not understood by an untrained eye. Computer programming continues to be a necessary process as the Internet continues to expand.
Software Developer - They are programmers who have expertise on developing a particular type of solution effectively and efficiently. In most cases, software developers are just programmers, may be with a better project experience. In some cases they are known indifferently as software engineers though, I don't think Software Engineers fall under these category.
Software development is the process of developing software through successive phases in an orderly way. This process includes not only the actual writing of code but also the preparation of requirements and objectives, the design of what is to be coded, and confirmation that what is developed has met objectives.
Before systems development methods came into being, the development of new systems or products was often carried out by using the experience and intuition of management and technical personnel. However, the complexity of modern systems and computer products long ago made the need clear for some kind of orderly development process
Software Engineer - A software engineer is somebody who applies a formal or structured approach to the development of software. He thinks about correctness, completeness, re-usability and workability that matches the end goal for the finished product. A good and short alternate definition may be - a software engineer is one employed to solve problems by the application of information technology.
There are few more categories to be known and will discuss the same in future posts.
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