What is your knowledge on NO THIRD PARTIES / NATIVE DEVELOPMENT of: - Socket.io? - API backend? - Javascript? - iOS? - Android?

What is your knowledge on NO THIRD PARTIES / NATIVE DEVELOPMENT of: - [login to view URL] - API backend? - Javascript? - iOS? - Android? Do you have / your team have deep knowledge of this? How big is your team? Can you develop your self too, or are you only a sales person? What is your hourly tariff? Do you provide 24/7 support when things are broken? Can you supply 12/7 development support when needed? Is your team speaking English or only you? Do you have a company? or are you working from home, no company Can you sign a NDA? Answer these questions very seriously before meeting with my colleague