In short: we're looking for people with overlap between instructional design experience and programing+ml industry experience, to create instructional content.
A masters in education/instructional psychology isn't needed, so long as you can demonstrate pedagogical aptitude. In other words, can you put yourself in the mind of a beginner, and craft an explanation which is clear, intuitive, and anticipates common student questions/pitfalls?
I'm confused as to whether you are looking to hire Instructional Designers (who probably have a masters degree in educational/instructional psychology) to design/build educational content, or if you are looking for programmers to build the learning management system (LMS) to host the content the Instructional Designers are building. Or... maybe you are looking for programmers to be subject matter experts for the Instructional Designers?
I sure hope you are not trying to get programmers to design and build top-notch educational content. That's like asking a programmer to also do the work of a graphic designer. They are two entirely different skill sets.