Bilingual Crowdfunding Platform Development

I'm seeking an experienced developer to create a bilingual crowdfunding platform for Angola, supporting Portuguese and English.

The platform will host a variety of campaigns, including:
- Charity
- Business startups
- Creative projects

Essential features are:
- User authentication & profiles
- Payment gateway integration
- Campaign progress tracking

Ideal skills and experience:
- Proficiency in both Portuguese and English
- Experience in developing crowdfunding platforms
- Strong background in payment gateway integration
- Expertise in user authentication systems

Please provide examples of similar work.