Excellent technical advice thus far! I will contribute with some Communication Strategy, which is what I provide my SaaS clients.

Instead of seeking 'growth hacking', propel yourself by 'niche hacking' in a disruptive manner. High potential mobile app niches for you include freemium game downloading, social network integrators and ecommerce.

It is critical that you identify your core competency and declare it to potential clients. In other words, make specific types of technologies : three at most, and I am happy to help you partner with accelerators and strategize in person meet ups to start the referral networks, as a previous expert suggested.

Remember: your audience more than anything seeks to be able to trust you, your credentials, your work ethic and success.
That is what we can together achieve.