Once T171787 is resolved, put together a concise documentation around Wikimedia technical areas expanding what we currently have in https://upload.wikimedia.org/wikipedia/commons/2/27/Wikimedia_Technical_Areas_An_Overview.pdf.
Link to the documentation for technical areas in whatever format produced (on-wiki or pdf) will be linked from the New Developers page.
We could also consider making a video with voiceover when we know the documentation is up to date.