Hoowla CMS Integration

I need an integration built between my site and the Hoowla CMS using their open API. The integration should focus on data synchronization.

Key Requirements:
- Sync the following data types:
- User data
- Transaction data
- Document data
- Use Hoowla's open API for integration

Ideal Skills and Experience:
- Experience with API integrations
- Familiarity with Hoowla CMS
- Strong background in data synchronization
- Proficient in handling user, transaction, and document data

Please provide examples of similar work done and ensure you are comfortable working within the specified budget.