MacOS Layered Image Editor

I am building a lightweight image editor that runs natively on MacOS. The core of the project is straightforward: a clean interface where users can open common image formats, perform the usual crop, resize and rotate actions, and work with multiple layers (show / hide, reorder, adjust opacity)... (Budget: $1500 - $3000 USD, Jobs: Documentation, Image Processing, Software Architecture, Software Development, Swift, Xcode)