Create wordpress plugin : Custom Booking Schedule

We are looking for a developer experienced in wordpress plugins creation that creates a custom booking plugin for us. This is the feature request list: Wordpress plugin using nice backend admin framework (elegant and modern backend screens) Create groups Create items in groups Pricing managment (fixed or variable per time interval..) example : 30 minutes --> 10 US$ Show grid like this demo and responsive with less columns and arrows to change column view Allow to add bookings using popup div Allow to specify hour start and end on grid and time intervals (this demo is 9:00-20:00 with 30 minutes interval) Allow to booking multi time slots at the same booking (continuous time frames) with a specific max. variable (example max 3 blocks of time) Allow to customize color scheme Allow to translate into other languages (Compatible with WPML) Create a wordpress shortcut to display grid with options (groupID, language,colorscheme..) Allow to specify customer form details in each booking process (register or social login) Allow to display list of reservations and manage them Allow to auto-accept bookings or manually accept as approved Allow to cancel bookings Allow to end user to login on frontend and check all his bookings (with historic) Allow to pay a booking using paypal Allow to create rules (for example disable time interval in specific group or items) Allow to create products and services and attach to reservation process (ref,product,description,price) Settings : Language selection, money symbol, symbol after or before money amount, tax included or specify tax