Hi,
I read your requirements as you mentioned that you want to create a financial application and once it's build you want to integrate it in your website.
I just need more details about the financial application to build and also please let me know that in which technology your current website built in.
I will build the application and integrate it in your website hopefully.
I am a expert web developer with 6+ years of experience,I have good experience in php,html,wordpress,ci,cakephp,yii,plugins,custom codes,css,bootstrap4,ajax,api etc.
I would like to come in PM and discuss in details and start work then.
Thanks
Saikat