I have a "systems" business analyst who works with designers. They are the first guard to prevent a design that looks right, but makes no sense in terms of enti

I have a "systems" business analyst who works with designers. They are the first guard to prevent a design that looks right, but makes no sense in terms of entity or data modeling. If I think things are getting too complex from my weekly check-ins with the design team, then I will send a developer to sit in on the meetings. What I do probably won't work for you, because team communication is incredibly political. You need political power to have your "guy/gal" sit in on another teams development/design process. Again I want to hammer home, the political nature of this. You need to cultivate good relationships first and foremost. The problem isn't tooling like Figma or Github, its relationships and trust between teams( assuming everyone is competent).