To ensure code is scalable and maintainable for future updates and integrations, software developers employ several strategies:

1. **Modular Design**: Breaking down the application into smaller, independent modules allows for easier updates and maintenance. Each module can be developed, tested, and modified independently.

2. **Adhering to Coding Standards**: Following industry-standard coding practices and guidelines (e.g., naming conventions, code comments) ensures consistency and readability across the codebase.

3. **Documentation**: Maintaining comprehensive documentation, including inline comments and external documents, helps new developers understand the code quickly and facilitates easier troubleshooting and updates.

4. **Automated Testing**: Implementing unit tests, integration tests, and automated testing frameworks ensures that new changes do not introduce bugs and that the system behaves as expected.

5. **Code Reviews**: Conducting regular code reviews promotes code quality, knowledge sharing, and adherence to best practices, helping catch potential issues early.

6. **Version Control**: Using version control systems (e.g., Git) allows for tracking changes, branching, and merging, enabling collaborative development and safe rollbacks if needed.

7. **Scalable Architecture**: Designing the system with scalability in mind (e.g., microservices architecture) ensures that the application can handle increased load and complexity over time without major refactoring.

8. **Refactoring**: Regularly refactoring code to improve structure, reduce complexity, and eliminate technical debt helps maintain a clean and efficient codebase.

By combining these strategies, developers can create software that is both robust and adaptable to future needs.