Hi There...
Based on your requirements, i have strong feeling that i could be the best fit for your "ExtJS 5 Grid Multi-Level groupping" job for the following facts:
-] I have proven experience & deep understanding on ExtJS 3, 4, 5 & 6 (Modern & Classic), D3.js, Ext Desk, Sencha Touch2, Sencha Architect & Other JavaScript libraries.
-] Developed 25 + big Extjs projects like scrum, patent & form designing environment. Including recently done 3 projects with Sencha 6.
# Can you please clarify these upfront questions:
-] As i am getting the concern requirement is for "Upgrading EXTJS 4 to 6" - Am i right?
-] I assume you have existing ionic EXTJS project source code? - So can you please share the source code, So i can glean the information from there?
-] What is exact Extjs version you were used for your concern ExtJs app?
-] Do you have the list of aspects which to be done in order of [Fixing The Issues, Resolving a defect & finishing app bugs? - If yes,
Can you please share the concern list in advance?
-] Is there any UI enhancement tasks also?
-] Is the app fetches request (API) from database - if yes then i assume you already have webservices (API) - Am i right?
Awaiting Reply
Thanks