Multi-Platform Construction Trades Advertising System

I need a full stack developer who can help me create a comprehensive platform to advertise various construction trades. This project will involve developing a website, android app, and ios app, all of which will share the same backend.

Key features of the system:
- E-commerce platform: Users should be able to browse and contact professionals from various trades.
- Advertised trades: The platform should feature plumbing, electrical work, carpentry, painting, masonry, and roofing.
- Consistent user experience: The website and mobile apps should have similar interfaces and functionalities.

Ideal skills and experience for the job:
- Full stack development: Experience in creating both front-end and back-end systems.
- E-commerce development: Familiarity with developing platforms for product/service advertisement.
- Mobile app development: Proficiency in creating android and ios apps.
- User experience design: Skills in designing interfaces that provide a seamless experience across platforms.
- Knowledge of construction industry: Understanding of construction trades and their advertisement requirements is a plus.