We can use Appium+Testng+cucumber+maven stack.
Is Java+Testng are not must for you then we can use Ruby+RSpec+Appium stack. We can complete framework designing in 3-4 days using Ruby+RSpec+Appium.
Relevant Skills and Experience
I am not reluctant to use Java+Testng stack but would like suggest scripting language like Ruby/Python to build framework.
Scripting languages are awesome and much readable than Java.
I've worked with a leading organization of the UK as an independent QA. I've experience of preparing and executing test cases, performing manual and automation testing and requirement analysis.
I've done a diploma certification in software testing.