Website Data Uploader with Basic Validation

I am looking for a developer who can design a data uploader for my website. The primary purpose of this tool is to allow me to upload different types of files such as Excel spreadsheets, CSV files and Text files into my website's backend.

Key Requirements:
- Support for multiple file types: The uploader should be able to accept a variety of file formats, including Excel spreadsheets, CSV files, and Text files.
- Basic Data Validation: Before the data is uploaded, I need this tool to perform basic data validation. This would involve checking for field completeness to ensure that all necessary fields are populated before the upload is allowed.

Ideal Skills and Experience:
- Proficiency in web development: The ideal candidate should have a strong background in web development, particularly in the area of creating uploaders.
- Experience with data validation: A good understanding of data validation is essential for this project.
- Familiarity with different file types: Experience in working with different file types such as Excel spreadsheets, CSV files and Text files would be an advantage.

If you believe you have the right skill set for this project, please provide details of similar projects you've worked on.