Software engineering spans multiple activities that can be performed sequentially or simultaneously by several development teams.
The product requirements should first be understood and summarized in a technical document outlining the workflow.
Software design involves the creation of an app’s architecture, primary components, and interfaces coupled with a detailed review of how they should work and interact with one another.
Programming presupposes coding and unit testing, with further debugging of the code.
The final stages are testing of the full app, its analysis in the operational state, and continuous maintenance after the launch.