Online Test Portal Development

I need an experienced web designer to create an online test portal. The portal should be user-friendly and support the following functionalities:

- User registration and login
- Timed quizzes
- Result analytics

It should cater to three user roles: students, teachers, and administrators.

Ideal skills and experience:
- Proficiency in web design and development
- Experience with user authentication systems
- Knowledge of quiz timer implementation
- Ability to create detailed analytics dashboards