If your finger print & Visa stamping is not yet done, then you can come on another company visa once you exit the country....No need of any NOC formalities from current employer...Make sure you exit the country without visa stamping and without any issues with current employer...

PS: You need an expert advice???? am not an expert... but i have an experience in same issue..I resign the previous job before visa stamping and came in another visa within 15 days...