SAAS Full Stack Developer Needed

I'm in need of an experienced Full Stack Developer to assist in the development of a SAAS application. The ideal candidate should be proficient in JavaScript, particularly Node.JS and Next.JS.

This is an update to existing SAAS. Not a brand new fresh copy.

Key Responsibilities:
- Implement user authentication: A secure and user-friendly authentication system is crucial for our SAAS application
- Integrate payment processing: A seamless payment system is a necessity. Experience with payment gateways is a plus.
- Develop data analytics features: The application should be able to provide users with insightful data tracking and analysis.

Hosting:
- We're considering a hybrid approach for hosting the application. Experience with setting up and managing both cloud-based and on-premises servers would be beneficial.

Skills and Experience Required:
- Proficient in JavaScript, particularly Node.JS and Next.JS
- Experience with User Authentication systems
- Previous work on Payment Integration
- Familiarity with Data Analytics and tracking
- Experience with both Cloud-based and On-premises server setups
- Prior experience in developing SAAS applications is a plus.