A company runs an on-premises managed file transfer solution to collect images from its clients. The company uses an open source transfer tool to transfer and integrate the images into the company's workflow. The company then runs a custom application to add watermarks to the images. The company needs to migrate this workload to AWS and wants to use AWS managed services where possible. Uploaded images must be stored as objects. The company wants to automate the watermark addition. Which solution will meet these requirements?