Automation Developer Needed for Validation & Reporting

I'm looking for an expert automation developer who can add workflow validation to my existing project and implement various data validation rules for a new report.

Requirements:
- Incorporate workflow validation into the existing project.
- Implement format validation, range validation, and cross-field validation for a new report.
- Include performance metrics for validation processes.

The ideal candidate will have extensive experience in automation development, particularly in implementing various types of validation. Proficiency in applying different validation rules is a must.

The existing project is built on a JavaScript platform. Please include customized error messages for each validation rule. The new report should be presented in a tabular format. Please use Selenium for the automation tasks.