Alter some Images resize images

Hi there, I run a locks screen advertising platform for Android that displays ads and content on the lockscreen. I want to have lots of images resized and cleared up for this platform that looks amazing on the lock screen - I will provide the images but also happy if you had some for me too. So the action is : 1. Take an image and make sure we resize it to a spec size and limited compression into jpegs. If the images I share are not in the right szie and wont make sense for the size needed, I need the person to be creative of how to get an amazing image into this size. 2. Uploaded into dropbox and we are done. This is a start-up business and everything is at a low budget but lots of work will come along. Attached are some examples of how the app looks + the spec document of the sizes etc. The person who I select will run a trail of 10 images to see how we get on. Additionaly work will come when we display ads and we can uniquely design each ad per client with a call to action. Please get engaged and let me know..