I can design or normalize relational tables, bound by foreign key relationships. Indices, checks included. Unstructured data can be stored in JSON, in PostgreSQL database. Projects: Website engine recording time of visitors’ tours duration, near B&B. At every checkpoint tourist scans the QR code. Uses simple open library from GitHub. Records started trips, and points reached to relational PostgreSQL database. No email or app needed, only QR code scanning utility. To prevent spamming of new trips, the first QR code is dynamic, on LCD screen. Set up of SabreDAV website and dependent mySQL database.