Why?
The Tyk Dashboard by default, includes nice functionality for a developer portal but in some cases, custom logic is required or to embed a portal into an existing platform. Thankfully Tyk is flexible enough to provide an easy way of integrating the portal to any platform and language using a few API calls.
Screencast covering the process of building a custom portal: https://tyk.io/docs/tyk-developer-portal/customise/custom-developer-portal/#why-build-a-custom-developer-portal
Please also check the page above for full documentation.