Agile engineering is a set of engineering practices based on the principles of the Agile Manifesto. It is intended to help software developers deliver high-quality, working software more efficiently and effectively. 

Some of the key practices of agile engineering include: 

- Continuous testing: Testing should be done continuously throughout the software development process. This helps to identify errors early on, so that they can be fixed before the software is released.

- Refactoring: This is the process of improving the code without changing its functionality. This can help to make the code more efficient and easier to maintain.

- Pair programming: This is where two developers work together on the same code. This can help to improve the quality of the code, as well as providing a check on each other’s work.

- Continuous integration: This is the practice of merging all changes to the code into a central repository frequently. This helps to avoid conflicts between different versions of the code, and makes it easier to track changes.

- Test-driven development: This is a methodology where tests are written before the code, so that they can be used to guide the development process. This helps to ensure that the code meets the requirements specified in the tests. 

Do engineers use Agile?

Yes, agile engineering is a popular methodology used by many software developers. It is especially well suited to projects that are constantly changing and evolving, as it is very flexible and can adapt to changes quickly.