We sell the same items on Amazon marketplace and our Zen Cart powered database. The stock list contained in our zen cart database is considered the master stock list. We need someone to sync our Amazon sales to our Zen Cart stock list to fulfil the following criteria, capable of being run on a cron:
1) An item sells on Amazon - reduce the Zen Cart stock figure by quantity sold
2) Item qty in Zen Cart <= 0, end marketplace listing
3) For an ended marketplace listing, if zen cart stock =>1, relist the item with qty 100.
We can't allow access to our ZC database or Amazon account, so you will be expected to run it on a demo server/accounts and we'll install it on our own server ourselves.
Give me a realistic estimate of completion time and make sure you can do the whole job. We have lots of projects on the go, so there could easily be more work for talented people.