In depth customizations - SonarSoftware/customer_portal GitHub Wiki
Since the code for the portal is made freely available, you are welcome to fork it and make any customizations you desire.
The back end framework used to build the portal is Laravel, and the front end framework is Bootstrap. Feel free to contact us if you have any specific questions.
If you'd like to build your own from scratch, consider using our customer portal framework - this abstracts a lot of the API calls used to build the portal. If you'd like to use a different language, the API documentation will provide you with all the same functionality as the framework - you'll just have to build it yourself!