USA-Based Used Car and automobile Aggregator

I need an experienced developer to create a used car website aggregator similar to Trivigo. The site should display listings from major online portals and dealers, including Autotrader and CarGurus, and almost all others.

Key Requirements:
- Integrate multiple car sale portals
- User login and account system, including social media login options
- Responsive design and user-friendly interface

Ideal Skills and Experience:
- Proven experience in building aggregator websites
- Strong knowledge of API integration
- Expertise in user authentication systems
- Familiarity with car sales platforms

Please include your city and country in your bid.