أنشئ حسابًا أو سجّل الدخول للانضمام إلى مجتمعك المهني.
ResearchGate, I guess. But you should take into your account that a lot of research communities are closed to access - they are usually related to a certain university/college/organization, etc. As for me, the best way to join the communities is collaboration with universities. Additionally, you can try LinkedIn to reach researchers in your field and build your network in this way.
