MacOS Construction Costing Program Development

I'm in need of a seasoned software developer who can create a MacOS-compatible construction project costing program. This program should enable users to generate comprehensive, costed project budgets by selecting and inputting various key project parameters.

Key User Inputs:
- Material type and quantity
- Labor hours and rates
- Equipment usage
- Logistic, transportation, and accommodation
- Insurance
- Quantity, unit, total cost, description of item, margin

Cost Categories to be Calculated:
- Material costs
- Labor costs
- Equipment and logistic costs
- Transportation
- Accommodation
- Total cost
- Direct cost
- Margin

The program should have the capability to calculate rates per unit item and total costs, while also maintaining a back-end database for real-time updates of material, labor, and other pricing variables. Ideal candidates for this project should have previous experience in the development of cost estimation software, with strong programming skills for MacOS. Knowledge in construction management and cost estimation principles is a plus. Please provide examples of similar projects you have worked on in your application.