what's the meaning of SDE and SDET from Microsoft?

* SDE may be:
  * Software Development Engineer
  * Software Design Engineer
 

* SDET 

* Software Development Engineer in Test

* Software Design Engineer in Test

Software Design Engineer

Codes and designs new software, often collaborating as a member of a software development team to create and build products.



Software Design Engineer Lead

Oversees a team of software engineers assigned to a product, product upgrade, or software research project.