Sky is to make roughly 600 tech roles redundant as it moves away from the development of new technology platforms.
The broadcaster is beginning a consultation with 900 staff across its Osterley, Leeds and Livingston sites.
Sky said it will refocus on existing services rather than platforms like Sky Glass and Sky Stream television, while more tech functions will be moved to international teams.
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There will be opportunities for some of those affected to find new jobs elsewhere in the company, but no indication of the number of people who might benefit from this.
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A Sky spokesperson said: “Over the past few years, Sky has launched a set of market-leading products including Sky Glass, Sky Stream and our full fibre broadband service.
“These products are now firmly established and used by millions of customers, strengthening Sky’s reputation for innovation and great service.
“As we look ahead, we are shifting our approach to bring customers the next generation of experience by investing in digital-first service, unbeatable content, and even better performance from our products, powered by the best of global innovation.”