I'm in need of a GST billing software. It can be built using either PHP or Node.js, with no strong preference for one over the other. The software needs to have the following key features:
- Invoice generation
- GST calculation and reporting
In addition to these, I would also like the software to incorporate:
- Inventory management
- Expense tracking
- Multi-user access
Ideal candidates would be proficient in either PHP or Node.js, and have prior experience in developing billing software. Understanding of GST and its billing requirements would be an added advantage. Please provide examples of relevant projects in your proposal.