The company, a leader in developing software used widely by sales and marketing people, is moving into the 929 Office Tower, which is now under construction.

Share story announced Monday it has signed a lease to become the anchor tenant in Bellevue’s 929 Office Tower, now under construction.

The establishment of a large engineering office represents a major expansion for the company in the region, as it plans to double its employee count in the area.

The company will move into 85,000 square feet and has an option to expand beyond 100,000 square feet, said Matt Christian, executive director at Cushman & Wakefield-Commerce, whose brokerage worked on the deal.

San Francisco-based Salesforce doesn’t break down how many employees are in the region, but representatives said the lease will give it space to double its head count. The 85,000-square-foot space could provide room for more than 475 employees.

Salesforce, with more than 17,000 employees worldwide, has had a presence here for six years, occupying about 20,000 square feet in downtown Seattle and more than 12,000 square feet at Bellevue’s Key Center.

The company, which makes software that helps salespeople and marketers manage their operations, will bring all its employees in the region under one roof when it moves in, expected in the first half of 2016.

Salesforce, which had sales of $5.37 billion in fiscal 2015, is the latest in a long line of companies, mostly from Silicon Valley, to announce new or expanded engineering offices in the Puget Sound area.

The region’s tech scene is known as a good place to recruit tech workers, bolstered by the talent coming from Microsoft and as well as from the University of Washington.

Salesforce differs a bit from most of the rest by choosing to set up its offices east of Lake Washington, as opposed to the recently popular tech haven of Seattle. The office, at 929 108th Ave N.E., is close to Seattle, UW and Redmond, company officials said, but the real draw was the chance to be the largest tenant in the building.

“We wanted the opportunity to be an anchor tenant in a brand-new building, and to be able to build out from scratch an absolutely amazing space,” said Jim Walsh, senior vice president of infrastructure engineering at Salesforce.

Salesforce partners closely with Microsoft, though Walsh said the proximity to the Redmond giant wasn’t the main reason for the expansion. The region is a hub for recruiting talent, especially in cloud computing for businesses, Walsh said.

“One thing about the Seattle area, and I think it’s attracted a lot of companies here … is there is a great and growing talent pool here,” Walsh said. “We have an amazing university, and Seattle is a growing city. There are people moving to the city all the time.”

The office will become one of Salesforce’s largest tech hubs outside of San Francisco, the company said.

Salesforce engineers in the Puget Sound region work on a wide range of projects, said Gary Flake, chief technology officer for search and data science, with emphasis on search, data science, infrastructure and mobile.