Participant modelling - the structure of enterprises and organization and how they interact among each other.
XML, Java knowledge - basic knowledge of these are a must.
Payment processing knowledge
Knowledge about service definition framework, JMS queues.
Eclipse plugin development - RCP mainly SOM, SIM PCA of Sterling.
Process modeling (very must when integration with other systems like wc)
Inventory - Bin allocation, picking type configurationship node configuration, etc
Knowledge on pricing, contract and data model for customer, item and Knowledge on customizing COM.
Knowledge on the warehouse integration is a must to have as well.
Knowledge on sterling configurator for dynamic kits is a plus.