Sales Management Web App Development

I need a web-based sales management application designed for sales representatives, managers, and administrators. The app should be optimized for both desktop and mobile platforms.

Key features include:
- Sales attribution tracking
- Commission calculation
- Real-time commission updates

Ideal skills and experience:
- Proficiency in web app development
- Experience with sales management tools
- Strong UI/UX design for mobile and desktop
- Background in database management and real-time data processing

Looking for a developer who can deliver a robust, user-friendly application with seamless functionality.