Development: Write the code for your software/application. This phase can be broken down into several sub-steps:
Front-End Development: For web and mobile applications, this involves coding the client-side interface using technologies like HTML, CSS, and JavaScript.
Back-End Development: This part deals with server-side logic, databases, and APIs. Common languages and frameworks for back-end development include Python (Django, Flask), JavaScript (Node.js), Ruby (Ruby on Rails), Java (Spring), and PHP (Laravel).
Database Design: Design and implement the database structure. Choose a suitable database system (e.g., MySQL, PostgreSQL, MongoDB) based on your data storage needs.
Testing: Continuously test your code to identify and fix bugs and issues. This includes unit testing, integration testing, and user acceptance testing.