Internet telephony service Skype is set to hire 400 people in five cities across the world, with a quarter to be based in London.
It will increase its headcount in London by 40 percent to 330 positions. The jobs will help develop new technologies the company is working on.
"We have one project about big data, which is about making use of data that our users generate when using the product to improve the quality of the products we offer," Rick Osterloh, Skype's vice-president of product and design, told the BBC.
"We also have a number of initiatives we are working on in the web area, and we are hiring some positions for our newly formed Xbox division."