i need customized accounting software

I'm looking for an experienced developer to build an accounting software solution tailored to my business needs. The software must include invoicing and billing capabilities, as well as inventory and payroll management features. The software will need to be accessible by up to 5 users and should be completed within a month. If you have the skills required to develop high-quality software solutions, I invite you to bid on this project. Please include details in your offer about your experience with accounting software customization.