Full Stack Java(Springboot) & React/Flutter Developer for a Membership web application

I'm in need of a skilled Full Stack Web Developer who can proficiently work with Java (Springboot), React, and Flutter as I am building a custom business application.

it will be a membership based application.
Screens needed
1)Home Page
2)Login page
3)Registration page : paid subscription with 7 days free trial including OTP(amazon pinpoint) and Email verification
4)Main Page after login : Will present list of crypto to users which user can choose to subscribe to or unsubscribe for..user can select any crypto from list and see its recent trades
5)user profile panel and user can see all his trades here.
6)Admin panel, to manage users and crypto to be traded

Not needed : trading logic or anything that will be managed by us. you just need to build the panel for users to subscribe to them


Key Responsibilities:
- Develop and implement the front-end elements in React or Flutter.
- Build and maintain the back-end using Java Springboot and postgresql
- Integrate the front-end and back-end systems seamlessly.
- Ensure the application is robust, secured, and scalable.
- Assist with troubleshooting and bug fixing.

Ideal Skills & Experience:
- Proficiency in Java (Springboot), React, and/or Flutter.
- Experience in developing custom business applications.
- Strong understanding of front-end and back-end development.
- Good problem-solving skills.
- Ability to work independently and meet deadlines.

If you have a strong track record in developing custom business applications using Java (Springboot) and React/Flutter, I'd love to hear from you. Please provide examples of your past work in your application.