Integrate Java PHP App with Website

I need a skilled developer to connect my main website to a Java PHP application. Please note, no developer support or documentation will be provided.

Requirements:
- Experience with Java, android and PHP
- Strong understanding of web integration
- Ability to work independently without documentation

Ideal Skills:
- Proficiency in API development and integration
- Experience in user authentication mechanisms
- Background in data synchronization techniques

Please provide a brief overview of your experience and approach.