Areas in which I can intervene
A web app as the advantage of being accessible from every device whether it be a computer or a mobile. This allow you to make your service accessible for a larger user palette.
When developing a web and/or mobile application it could be a valuable things to think about making an API. It allows to better structure code, and to reuse some of your logic and algorithms between different applications (mobile and web for ex.).
Today, in the air of digital, getting a web site is essential to improve your company visibility.
Mobile hybrid app
Nowadays, and increasingly, the web traffic is done via mobile phones or tablets. Think about making a mobile application for your company may create a real advantage. I can offer you to develop an hybrid mobile application (i.e cross platform application, available on both, Android and Apple devices).
To keep a good health, web site and application needs to be regularly updated