Looking to build a software to pull Linkedin contact & emails details

We are looking to build software that can help in pulling contact details of a person like direct dial/mobiles and emails. This should pull information from a Linkedin profile. As I wanted to build such an application that can extract the data from LinkedIn and manage with a professional UI and complete control to the admin. I am going to describe the feature which is needed to develop. As it is clear, there are two parts two-part for this application. 1. Frontend 2. Backend A> Frontend is a matter for the look and feels so please pay attention as much as possible to make it professional and look and feel as you can. B> Backend can be considered and there is no need to pay attention to the admin interface. Note: Application must be user friendly and mobile friendly with professional look and feel just like [login to view URL] Process to Follow Now I am going to describe approx. complete feature of frontend and backend step by step. Stage 1 Step 1The customer interface, packaging, SaaS module + Dummy launch for promotions + Chrome Site Extractor Plugin Step 2 Linked In Extractor - First Name, Last Name, Company name, Company website, Position/Job Title, Department, Level, City, State, Country Step 3 Google search on getting the other social profile URLs (Twitter, LinkedIn, Facebook) + Revenues Algorithm + Upscaling & auto-crawl Step 4 Final Delivery of Platform & Portal & Simple Analytics Dashboard and to the production server. Step 5 After Dev Maintenance, plugins, widgets and Dev (Below 20 days dev) Stage 2 - Email Verification API Service + Auto guessing + People API Stage 3 - Firefox plugin, Edge Plugin Stage 4 - Fraud Detection System Stage 5 - Job change etc. Notification + Sales data/software enrichment platform More detail will be shared later