We need a custom Windows CRM for business formation services and cash register management

I'm looking for a candidate to help us build a custom Windows CRM for business formation services and cash register management. This CRM will be used for starting a new enterprise, and will require the ability to manage client data, generate documents, and provide notification and task management. We prefer a precise programming language, such as Java or C#, to ensure compatibility with the Windows platform. Please let me know if you have the required expertise. Specific features are required, including contact management, sales pipeline tracking, invoicing, billing, task management, and notification systems. If you feel comfortable designing, building, and coding this for us, please provide samples of past work or programming language experience. We can't wait to work with you!