We can discuss the budget after you have reviewed the job.
I need you to mirror my Drupal site into MongoDB, I have the site setup with Drupal's Services Module and REST endpoint in JSON which should take care of most of the documents, you need to mirror eight MySQL tables directly as well.
... After an initial import, my content editors will keep working in Drupal, and your NodeJS code will catch their changes and update MongoDB.
I have done this before, exactly, and can give you the code if you want to see what the previous programmer did -- maybe you just need to improve on his work or re-use his code if that is easier for you.
... Please let me know if you are interested in front-end work as I may hire you simultaneously to build my new site UI in MNAP, I have some NodeJS and Solr servers running, and need to integrate data from those APIs apart from MongoDB you will have created.