Banking giant HSBC is set to cut approximately 260 jobs in its Swiss division over the next two years, as the business shifts to a new computer system.The London-listed group, one of the biggest lenders in the world, confirmed it was making a strategic investment in a new "core banking platform", adding back office jobs would be the most affected by the move."HSBC Private Bank SA is currently consulting with employees about an expected headcount reduction arising from further streamlining of the Bank and the implementation of a new core banking platform," the bank said in a statement on Wednesday.However, the lender did not confirm the figure, which would see almost 20% of its workforce in Switzerland being cut, adding that any staff reductions would have to be subject to a consultation process.HSBC said it remained fully committed to continue its Switzerland-based operations and that the country remained a priority market for the group.A "reliable source" was quoted as saying by Swiss newspaper Tribune de Genève that the new software would cost the bank $200m (£130m).HSBC shares were up 0.22% to 648.80p at 15:13 on Wednesday.