Hello,
I saw your project and I got to do a bit of research on recording voice over web. From what I've seen so far, there are a few alternatives to achieve this with quality. My first concern was cross-platform support, as not all browsers and devices are created equal. Yet I've seen there are a few amazing packages I noticed that can support all major platforms.
To give a bit background info of myself, I've been working with mainly PHP5.5-7, along with technologies like MySQL, Apache/Nginx, Linux (the stack known as LAMP or LEMP), JavaScript, MeteorJS, MongoDB, many front-end libraries such as Bootstrap, Semantic UI, Foundation etc for over 3 years. I've worked with companies and individuals from USA, CA, Costa Rica, UK, AU in these past years for mid to big size projects.
Besides the languages and technologies, I tend to consider ideas and their business value and how I can implement them for a given project. I haven't worked on a similar software yet, but it would be really interesting to do so.
If you would like to discuss further, I'd be happy to support you from the idea stage to the final product.
Best Regards