Create an Accounting software

I am looking for an experienced software developer to create an advanced financial management software for my business. This software should encompass several features such as creating and managing accounts receivable, creating and managing accounts payable, invoicing, running financial reports and scenarios, budget management, performing bank reconciliations and generating auditing-ready documentation. I have a few ideas of the features I would like included, but I am also open to suggestions. It is important to me that the software be capable of integration with other software and thus should include APIs wherever possible. This project will require approximately more than 3 months to complete and I am offering a generous compensation for the job.