Hello There!
Greetings from S.I.S Technologies!
Hope this finds you well. AS you had asked for the following skills, Let me come to them one by one:
1. We had integrated PayPal using API's which ultimately saves a lot time. We had even upgraded it for iOS9.
2. We do regress testing before sharing the codes with client. We also do unit tests so that the codes will be optimized.
3. We have designers and Testers who will do their part at their time.
4. They do have Windows skills, not much but they are in intermediate stage.
5. We can help you with 2-D games.
Rest of the points are almost similar to the above mentioned points, hence we can do the remaining points too.
Here i would also like to share that, you can choose anyone, but the difference between us and someone else is that we work as partners rather then as developers. At every stage of work, we keep in mind that we are service provider, hence we never make false commitment and be straight forward with our clients.
Regards,
Sufiyan