Apple Developer Account Link
Source:

To find your developer/team ID if you already have an Apple Developer account, you can go to https://developer.apple.com/account/#/membership.

Scroll down to Team ID and that's it.

If you don't have a paid developer account you will not have a developer ID.

Update based on comments:
Source.

To find the link for all your apps:


  There are three types of App Store Short Links, in two forms, one for
  iOS apps, another for Mac Apps:
  
  Company Name
  iOS: http://appstore.com/ for example, http://appstore.com/apple
  Mac: http://appstore.com/mac/
  for example, http://appstore.com/mac/apple   
  
  App Name
  iOS: http://appstore.com/ for example,
  http://appstore.com/keynote
  Mac: http://appstore.com/mac/ for
  example, http://appstore.com/mac/keynote  
  
  App by Company
  iOS: http://appstore.com// for example, http://appstore.com/apple/keynote
  Mac:
  http://appstore.com/mac// for example, http://appstore.com/mac/apple/keynote   
  
  Most companies and apps have a canonical App Store Short Link. This canonical URL is created by changing or removing certain characters (many of which are illegal or have special meaning in a URL (for example, "&amp;")).
  
  To create an App Store Short Link, apply the following rules to your
  company or app name:
  
  
  Remove all whitespace Convert all characters to lower-case 
  Remove all copyright (©), trademark (™) and registered mark (®) symbols
  Replace ampersands ("&amp;") with "and" Remove most punctuation (See Listing 2 for the set) Replace accented and other "decorated" characters (ü, å,
  etc.) with their elemental character (u, a, etc.) 
  Leave all other characters as-is.