Integrated CRM HRA ERP Portal Development

I need a comprehensive portal that integrates Customer Relationship Management (CRM), Human Resource Administration (HRA), and Enterprise Resource Planning (ERP). This system should streamline our operations and enhance efficiency across all departments.

Key Components:
- CRM: Manage customer interactions, sales tracking, and client data.
- HRA: Oversee employee records, payroll, recruitment, and performance management.
- ERP: Integrate core business processes, including finance, supply chain, and project management.

Additionally, the platform should include:
- B2B Selling Platform: Facilitate business-to-business transactions.
- D2C Selling Platform: Enable direct-to-consumer sales.

Ideal Skills and Experience:
- Proven track record in developing integrated CRM, HRA, and ERP systems.
- Expertise in web development and database management.
- Strong understanding of B2B and D2C e-commerce platforms.
- Ability to create user-friendly interfaces and ensure data security.

Please provide examples of similar work done, along with your approach to this project and estimated timeline.