Data virtualization engine using Neo4j and MongoDB

Looking to build a data virtualisation platform using Neo4j and MongoDB. -- build a UI on top of Neo4j query layer and ETL layer -- connect to multiple databases (MySQL, Postgres, Oracle etc ) using jdbc, csv but not move data to Neo4j but save data structure , relations and data location in MongoDB. --- UI function to build Neo4j relations between datasets from multiple data sources. --- Query panel and result viewer. Both number output and graph output. -- Export the results out to csv -- Need to build the engine to run the queries fast with virtualization in place, not actual data available in the graph db. Only freelancers who has worked extensively in Neo4j may apply. And provide details of Neo4j experience in the proposal