Build a Client Login Portal with Dashboard, Contracts, File Uploads & Payments for Engineering Company

I am looking for an experienced full-stack or WordPress developer to build a secure client login portal integrated with our existing website.

The portal will allow clients to sign up using social login, access a personalized dashboard, manage contracts, hire engineers, upload files securely, and handle invoicing & payments.

You may use plugins (preferred for speed) or custom development where required. The final solution should be professional, secure, scalable, and easy to manage.

Key Features Required

1. Authentication & User Management

Social logins (Google, LinkedIn, Microsoft, etc.)

Secure client signup & login

Role-based access (Client / Admin)

Private area for each client (no client can view another’s data)

2. Client Dashboard

Each client should have a personalized dashboard with:

Overview of their contracts

Status of engineer hiring requests

Invoices & payment history

File uploads (secure, client-specific)

Messaging

Notifications

3. Contract Management

Upload and manage engineering contracts

Track contract status

Allow clients to view/download their documents

Optional: version history or document revision control

4. Hire Engineers Module

A form or workflow for clients to request additional engineers

Admin backend to manage, review, and assign requests

Optional: messaging or status updates

5. File Upload & Storage

Secure file upload area for each client

Only the client and admin can access files

Preferably stored on a secure cloud folder (S3, Wasabi, or similar)

6. Invoicing & Payments

Create and manage invoices

Client can view and download invoices

Online payments via PayPal

Payment status tracking

7. Admin Panel

Manage clients, contracts, engineer requests

Manage uploaded files and invoices

Access to complete reporting

Preferred Technology Approach

We are open to:

A) WordPress + Plugins (preferred for fast delivery)

Plugins such as:

Ultimate Member or JetEngine for user dashboard

Nextend Social Login

Gravity Forms / WPForms

Sprout Invoices or WooCommerce-based invoicing

B) Custom Full-Stack Development

(React/Next.js, Node.js, Django, Laravel, etc.)

Please specify which approach you recommend and why.

Requirements for Freelancers

Experience building membership portals or SaaS dashboards

Strong understanding of website security

Experience with invoicing & payment gateways

Ability to deliver clean, well-documented code

Good communication skills

Must be able to advise on best plugins, tools, or tech stack

Deliverables

Fully functional login portal integrated into our existing site

Complete client dashboard

Admin management panel

Payment integration

Deployment to production

Basic documentation or walkthrough