API Development for Web Apps

I'm looking for an experienced API engineer to create a robust API for our web applications.

Key Requirements:
- Type of API: REST, GraphQL, or SOAP (please specify your expertise)
- Primary interaction: Web applications
- Essential functionalities: User authentication, Data retrieval, Data submission

Ideal Skills:
- Proficiency in API design and development
- Strong experience with web application integration
- Knowledge of security protocols for user authentication
- Ability to handle large datasets for data retrieval and submission

Please provide examples of previous work and specify your preferred API type.