Build me a custom flutter job app

Project Name: HireOn Employment LTD, Complete employment solution worldwide with flutter and PHP backend
Budget: 500 USD Fixed. ( no negotiation )
You can start from scratch or customize any project for me
Must be highly secured
Concept: Hireon is a flutter job board app with a PHP backend. It will be a single-vendor application. Employer, admin, and job seeker user group for this project. There will be user and employer registration forms.
Actually, this project is for collecting unemployed person’s data and posting jobs for them.

Fronted: flutter

Backend: PHP

Connected through API
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Total Screen:
Welcome
Login OTP
Language
Referral
Language
Role Selection
Registration Screen for Candidate
Registration Screen for Employer
Screen After Signup
Jobs List
Detailed jobs
Post Job
Professional category List
Candidate profile view
Candidate profile detailed view
Edit Profile
Track application process
Delete Account
Training Video Playlist
Training Video streaming page