Tax Advise – Limited Company?

I have incorporated a limited company recently to minimize my tax payment. I am the sole director and there is no secretary. I work through agency on hourly basis. Do i need to pay employment tax and NI if i registered as a limited company? Does the IR35 apply to limited companies?
what i was intending to do is to take all the profit as a dividend hence avoiding employment tax. Can i consider myself as a Personal Service Companies or does my company fall in Managed Service Companies.
Please advise urgently.
Regards
JR Brown