Roofing Company CRM Development

I'm looking for a skilled developer to create a comprehensive CRM for my roofing company, designed to function as a SaaS application. The CRM should include the following key features:

Client Management: Maintain a detailed database of clients, including contact information, project history, and communication logs.

Job Scheduling: An intuitive calendar to schedule jobs, assign tasks to field workers, and manage work orders.

Invoice Generation: Automatically create and send invoices based on completed jobs, with options for tracking payments.

User Roles: The system should support multiple user roles, including:
- Admin: Full access to all features and settings.
- Sales Team: Access to client management and job scheduling to track leads and manage sales.
- Field Workers: Ability to view their assigned jobs and update job status.

Platform Accessibility: The CRM must be accessible via web browsers, ensuring that all users can access it from any device with internet connectivity.

Ideal skills and experience for this job include:
- Strong background in CRM development.
- Experience with SaaS application architecture.
- Proficient in web development technologies.
- Familiarity with user role management and permissions systems.
- Excellent UI/UX design skills to ensure the application is user-friendly.

Please include examples of similar projects you've completed and your approach to ensuring data security within the application. Looking forward to your proposals!