Need a Postgres Expert

We are looking for a expert who can process the data from one table in postgres and save it to another table in Realtime. Process ---- in table 1, 3000 records insert Per/s which need to be processed , calculating deference between two keys (current volume - previous volume ) and insert the difference in new table with related values/keys/. within same second
Database Administration, Elasticsearch, NoSQL Couch & Mongo, PostgreSQL, Python