Build a simple job board

I need to build a simple custom board job portal (for a specific job field) Here are the details : [+] We have 4 roles : job seeker, employee, admins & moderators => we need to affect permissions to each moderator (not all moderators have the same permissions) [+] The plateform details : 1 - A job seeker can browse the jobs, and apply for a job. 2 - The Employee will not know that someone applied to the job, until an admin check and approve the application. 3 - The admin can transfer the application to another job/employee. 4 - The admin can affect a job seeker to a specific job. 5 - Once the job seeker/application is affected to a job, an invoice must be generated to the employee, and a pending payment request is generated to the job seeker. 6 - The job seeker will finish the work, the employee will pay us, and we will pay the job seeker. 7 - Both the employee and the job seeker will review each others (with admin approval). PS : we should send a notification (email/sms) to the job seeker/employee in each confirmed step. [+] More details : => Both the job seekers and the employees can create an account (with admin/moderator approval). => Both the job seekers and the employees can edit their profiles. => Employees can create/edit a job (with admin/moderator approval). => Job seekers can list, view and apply to jobs. => Job seekers can opt-in to email/sms notifications when a new job is listed (based on their preferences). => Job seekers and employees can see their jobs and payment history => Admins can add/edit/delete pages Please read the project's description in full before placing your bid. Regards