With your extensive experience, it would be the right time to change sides and learn ABAP. Download the ABAP trial and understand how it works there. Maybe start with some small examples and use Web Dynpro for ABAP. If you have difficulties, try Web Dynpro for Java (you downloaded it with the SAP Java Stack) first to be on familiar grounds and transfer your knowhow to ABAP. You can do the portal right now. It should not take you more than two days to understand. The real market for you is in PI instead; this requires training. If you need self-training access, you may use online access from michaelmanagement.com. Or in India you should keep an eye on the upcoming SOA/PI camps (see nleague.com).