Fix an Angular 2 (Material IO based) Datagrid - ANGULAR 2 EXPERT needed

I need an EXPERT angular 2 developer to fix my data grid. The grid works as follows: 1) There are two multi-select drop [login to view URL] data for the drop-downs is fetched from the firebase DB. 2) After selecting the item / items in the multiselect drop down list, the selected items are displayed in the Materal IO Datagrid. Issues with my above code are as follows: 1) My current code fetches the values from Friebase to the multi-select dropdowns, but is not able to get DISTINCT items in the dropdown. 2) The multiselect dropdown is not able to show the filtered item on to the Material IO data grid. Thus, I need an EXPERT ANGULAR 2 coder who can resolve this issues which are mentioned above.