Advanced Photo Manipulation for Social Media

I'm looking for an experienced and skillful photo editor to professionally merge and replace the background of multiple photos.

Specific tasks required:
- Adjust brightness/contrast for aesthetic consistency
- Crop and resize photos to ensure perfect fit
- Replace the original background with a more suitable one

Please note, the primary utilization of these finalized photos will be for social media posting, therefore, the final images need to be modern, engaging, and tailored to grab attention.

Ideal skills and experience:
- Significant experience in advanced photo editing and manipulation
- Proficient in the use of leading photo-editing tools like Photoshop
- Solid understanding of social media posting trends and visual requirements
- Previous experience in social media-oriented photo editing.