Remove bg from images resize and add watermark

We need the following, this is an ongoing project.
Start bidding on 200 images
I need someone toi do some simple background removal of office furniture.
Mostly taken with white background and blue floor.
I need images resized (can be easily done in a batch, same goes for watermarks). Watermark in the left bottom corner. (png file will be sent to you)
Need someone skilled who can process 100 images very fast.