Comprehensive API Development

I'm looking for an experienced developer to build a robust API primarily for data retrieval. The API will need to interact with a web application, mobile application, and various third-party services.

The data to be retrieved includes:
- User information
- Financial data
- Product details

Ideal skills and experience:
- Strong background in API development
- Experience with data retrieval across multiple platforms
- Familiarity with integrating APIs with web and mobile applications
- Knowledge of third-party service integration
- Proficiency in relevant programming languages and frameworks

Please include examples of previous work and relevant experience in your bid.