Customized ERP/CRM Solution for Aquantia

Full-Stack Developer Needed – Custom ERP/CRM Web Application for Water Treatment Company

Descripción

We are looking for an experienced Full-Stack Developer to build a custom web-based business management system for our company, Aquantia.

We do NOT want Odoo or another existing ERP implementation. We want a simple, modern custom web application built specifically around our business workflow.

Phase 1 workflow:

Lead → Sales Follow-up → Customer → Sale → Contract → Financing → Installation → Delivery/Installation Document → Invoice → Sales Commission → Warranty

Main features required:

* User login and different user roles
* CRM with sales pipeline
* Customer database
* Lead management
* Customer profile with complete history
* Contract generation from customer data
* PDF document generation
* Electronic signature
* Installation/work orders
* Assign jobs to external installers
* Digital installation/delivery document
* Customer signature after installation
* Upload installation photos/documents
* Invoice generation
* Sales commission calculation
* Warranty information
* Basic dashboard and reporting
* Search and filters
* Responsive design for mobile and desktop
* Secure database
* Backups
* Spanish interface

Future integrations/features:

* Meta Lead Ads integration
* WhatsApp integration
* Automated emails/messages
* Inventory/stock
* Maintenance reminders
* Customer support/tickets
* Advanced reporting

We want to start with a simple Phase 1 and continue developing the platform as the company grows.

IMPORTANT:

We require full administrator access and ownership of the source code and database.

Please provide:

1. Fixed price for Phase 1
2. Estimated delivery time
3. Technology/framework you recommend
4. Examples of similar CRM/ERP systems you have built
5. Monthly hosting cost
6. Any ongoing maintenance costs
7. Any third-party services with additional monthly costs
8. Confirmation that all source code will belong to us

Please do not send a generic proposal. Explain briefly how you would build this system.