Need developer update Google biling version in project

I am looking for a developer to update the Google billing version in my project. The project is written in JavaScript and there is no strict deadline for this update. Additionally, I have specific features in mind that I would like to add with this update.

Ideal Skills and Experience:
- Proficiency in JavaScript
- Experience with Google billing integration
- Strong problem-solving skills
- Attention to detail and ability to follow guidelines
- Good communication skills to understand and implement specific features