I have recently worked on a complex Drupal website. I'll be going through how architectural decisions were made, the challenges and solutions chosen. I'll be helping you avoid mistakes that were nearly made.
I'll be showing how I built a Quote builder with Webform, and based on the criteria selected, chose relevant Drupal Commerce products from a list of 5000 and added them to the cart. I'll be sharing how I harnessed the power of the Group module to build 4 tiers of access control including staff, branches, head offices and client users.