Software developers use programming and design knowledge to build software that meets the needs of users. Typically, they will meet with a client who has a need for software to be developed, and then will build, test and deploy that software based on the specifications they have received.
Today, software developers are some of the most vital people in the many aspects of the economy. Software isn't just codes, video games and apps, it's the driving force of every computerized device on the planet.