IT development incorporates all the resources used to develop and manage a platform or software. When using services, third-party assistance can be brought on to aid in the completion of projects, or any of the various tasks required for the completion of software. Some of those services include QA testing, business solutions, migration, application development, and application maintenance.
Generally, when not handled by on-site staff, remote assistance is for short-term projects. Sometimes these are referred to as "shadow developers."