The suit, which is seeking class-action status, accuses the company of discriminatory practices in performance reviews, pay and promotions.

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Two current Microsoft employees have joined in a lawsuit that claims the software maker’s performance reviews, pay and promotion practices discriminated against female engineering employees.

Katie Moussouris, a Kirkland resident and former Microsoft employee who worked on cybersecurity issues, filed the original suit in Seattle federal court last month. The suit is seeking class-action status.

She has been joined by two current Microsoft employees, according to an amended complaint filed Tuesday. They are Holly Muenchow, an operations program manager who coordinates product releases and has worked at the company since 2002, and Dana Piermarini, who since 2000 has worked with Microsoft’s sales group to teach customers about company products.

Both women say male colleagues were promoted at faster rates, in some cases when they were less qualified or demonstrated worse job performance, the complaint said.

Microsoft did not immediate respon to requests for comment.

(Update, Oct. 27: A Microsoft spokeswoman said the company looked into the claims in the original complaint and didn’t find any evidence of wrongdoing on the part of the company. She said the company would review the new allegations.)

Piermarini, the complaint says, raised concerns with the company’s human resources group that she was being treated less favorably because of her gender, including allegedly singling her out for child-care responsibilities that, she said, were similar to those of male employees and had no impact on her job performance. The company’s investigation found that her manager had done nothing wrong, the complaint says.