A new Apple job listing hints that the company could be planning to introduce new colours for its next-generation iPhone, dubbed iPhone 6 or iPhone 5S.

The listing, which was posted on Apple's Jobs site on Friday, is searching for an Anodizing Engineer to join the Manufacturing Design team to help create the next-generation Apple products.

SEE: iPhone 6 release date, rumours and leaked images

The iPhone 5 comes in Black & Slate and White & Silver models, both with anodized 6000 series aluminium backs, the same material used in MacBooks. Reports have suggested that Apple could anodize the aluminium back plate of the next iPhone to bring new colours to the line-up, as it has done already with its new iPod touch and its iPod nano line up.

We've heard rumours that the next-generation iPhone will come in multiple colours since the end of 2012, with Jefferies analyst Peter Misek claiming that the iPhone 6 will be available in six to eight colours, and Topeka Capital analyst Brian White also suggesting a possible eight colours for the device earlier this year.

[Via Cult Of Mac]

See also:

iPhone 6 rumour round up for the week ending 1 March

iPhone 5S and iPhone 6 spotted at Apple suppliers, both to launch this year – report

Apple's iPhone 6. iPhone mini, phablet could look like this

iPhone 6 concept designs keep popping up

iPhone 6 with fingerprint sensor to launch alongside cheaper iPhone with six colours in June - analyst

Is this what Apple's iPhone 6 will look like?