Hi,
I have good experience in web development.I assure you that i will provide you the clean code as per you requirement.
I understood your requirement, you need LinkedIn login button, when users login into LinkedIn then their details such as name, work position and top skills and if any other fields that your required which includes their basic info and address needs to be stored in your database. I can write the code for this and provide you the functionality as soon as possible. Please contact me for further details.
Thanks & Regards,
Suriya Prakash.M