SAN FRANCISCO: Twitter will lay off employees next week as freshly-returned Chief Jack Dorsey pushes for a leaner operation focused on winning users, tech news website Re/code reported on Friday. Layoffs will be spread across the entire San Francisco-based company and will likely include engineers, which account for about half of Twitter’s approximately 4,200 employees, according to Re/code. The job cuts reportedly come as engineering teams are being reorganised at the one-to-many messaging service. Re/code cited unnamed sources in its report, while Twitter declined to comment on what it referred to as rumour and speculation.