Probably the best thing you could do is to just start teaching.

Pick a topic you'd like to cover in-depth, set up a blog and start writing about it and sharing it.

When applying for jobs, share this with the prospective employer.

I don't believe that this field is advanced enough to have its own qualification requirements as yet. It's mostly just a 'show me' rather than a tell me style of assessment from what I've seen.

Source: Have created courses online w/ over 6,000 students. And am currently in the process of creating another series of online courses and books for developers.

Here's a post where I share some tips on the better methods of teaching software engineering: https://fromtoschool.com/why-most-programming-tutorials-are-....