SMS Bulk Sender Software Development

I'm looking for a developer to create a software for sending bulk SMS. This software will primarily be used for sending promotional messages.

Key Requirements:
- Development of a SMS sending software with a web-based interface and API integration.
- Skills in software development, specifically for SMS services.
- Experience with creating user-friendly, intuitive web interfaces.
- Ability to implement API integration seamlessly.
- Understanding of promotional SMS content regulations and best practices.

I do not need support for multiple languages, just English. So if you have experience in developing similar software, and can comply with these requirements, please reach out.