Jim Xiao learned about building enterprise platforms at Microsoft China. An executive role at a wireless company taught him about manufacturing Android devices. And he saw how hardware wasn’t catching up to software during a 4.5-year stint with Dan Gilbert’s venture capital firm. All three experiences led Xiao to what is arguably his most exciting adventure yet: leading Seattle startup Mason, which has quietly grown into a fledgling “mobile infrastructure as a service” company that just raised a $25 million investment round. Coute Management, which just raised a $700 million fund, led the Series A round.