Twitter Inc. employees are enduring the whiplash of public commentary from the social network’s future owner, a changeover in leadership and a hiring freeze. On top of all that, some will be assigned new jobs as the company shifts away from its riskier projects.Twitter Inc. employees are enduring the whiplash of public commentary from the social network’s future owner, a changeover in leadership and a hiring freeze. On top of all that, some will be assigned new jobs as the company shifts away from its riskier projects.