Microsoft began laying off about 6,000 workers Tuesday, nearly 3% of its entire workforce and its largest job cuts in more than two years as the company spends heavily on artificial intelligence.

The technology company, headquartered in Washington, is cutting 122 workers in Silicon Valley. The layoffs heavily affected software engineering roles.

Microsoft announced a mass termination of employment affecting over 6,000 employees, approximately three percent of its global workforce, on Tuesday.