Software developers design, program, build, deploy and maintain software using many different skills and tools. They also help build software systems that power networks and devices and ensure that those systems remain functional. Software developer duties and responsibilities include reviewing current systems, developing ideas for improving systems, working closely with data analysts, designers, and staff, writing program codes, testing the product before going live, preparing user training manuals, and maintaining systems once they start .Software developers design, program, build, deploy and maintain software using many different skills and tools. They also help build software systems that power networks and devices and ensure that those systems remain functional.