Wiltshire-based Dy-son has reported a record annual turnover of more than £1 billion, mainly thanks to buoyant sales in the US and Japan.

Around 750 top engineers and scientists work at Dyson’s Malmesbury-based factory, which makes bagless vacuum cleaners, fans and hand dryers.

The turnover of the company was £1.05bn in 2011, up from £887 million in 2010. Its earnings grew by 30 per cent in 2011 to £306.3m.

A spokesperson from Dyson said its drive to recruit new engineers and graduates was going really well.

“We’re always on the lookout for more people,” he said.

“We’ve hired 100 people already this year and we want to hire another 100 before the end of the year. It’s a nationwide search but the local area is important, a lot of our employees are sourced locally.

“Less and less people seem to be taking science or engineering degrees and there’s the incentive to work in the city because of the money, but the jobs are always competitive. As long as we keep inventing and creating new technology then jobs will be secure and we can increase the roles we offer.”

The firm has been steadily increasing the amount of products it exports – last year it sold 85 per cent of its machines outside the UK, compared with 30 per cent in 2005.

Dyson says it is now the top selling upright vacuum cleaner brand in the US, with a near 27 per cent market share. The firm, founded by Sir James Dyson in 1992, employs nearly 4,000 people worldwide. It says it plans to increase spending on research and development by 20 per cent during the next five years.

Dyson designs its products in Malmesbury but has moved much of its manufacturing to Malaysia.