Java Developer for Multiple Payment Integrations

I am in need of a proficient, experienced Java full stack developer. The primary task will involve integrating multiple payment gateways including Razorpay, PhonePe, PayU, Cashfree, and Stripe into my existing system. The project involves API development in the backend using Java Spring Boot Security and UI calls. Note that the UI is already set up and simply needs these new integrations.

Key requirements:
- The ability to professionally and efficiently implement these payment gateways into the existing system
- Strong familiarity and previous experience with Java Spring Boot Security
- Demonstrable experience with similar payment integration projects

The project budget is set at a fixed fee of 10k INR. Interested freelancers should highlight their relevant experience while applying. Unfortunately, specifics about the development approach and payment page functionalities have been left undefined, leaving flexibility for the chosen freelancer's expertise to steer these aspects of the project.

Skills required:
- Java full-stack development
- API Development
- Payment Gateway Integration
- Java Spring Boot Security
- Experience with the specific payment gateways mentioned is highly advantageous.