No, you cannot just join RAW by being a software engineer, you also ought to be fit both mentally and physically. You can only get into RAW through the following ways :-

1. If you are in the Indian Army the RAW people will have your record and based on your performance you can get selected.

2. If you are an IPS officer , IAS officer or belong to any such you can apply

Apart from this some things should be mandatory i.e you should not have any past criminal case record and you have to be a permanent Indian citizen