Hi,
Unfortunately we cannot give specific advice about your NICs whilst travelling around the world, but you can find general advice via the following link on Gov.uk
Social Security abroad: NI38
You will need to confirm with your employer if they will be deducting NIC from your monthly earnings. If you are earning below the monthly Treshhold for deducting NICs, you may not have a Qualifying year towards your pension. There is information in the above leaflet about paying voluntarily into the UK system.
If you need any further advice, you can contact our International NI Enquiry line.
National Insurance: non-UK residents
Thank you.