Uber isn’t letting tech workers join the ride, at least for now. From a report: The ride-hailing giant canceled scheduled on-site interviews for tech roles last week, and job applicants have been told positions are being put on hold due to a hiring freeze in engineering teams in the U.S. and Canada, according to multiple people who received the communications. In emails sent to job interviewees, Uber recruiters explained “there have been some changes” and the opportunity has been “put on hold for now,” according to emails reviewed by Yahoo Finance. The hiring freeze comes after 400 layoffs in its marketing department earlier this month, which raised concerns and fears company-wide. During a recent all-hands meeting, a question about potential layoffs in the engineering department was also raised, but executives didn’t provide any timelines. The number of hiring posts for software engineer roles at Uber peaked in March, according to data tracking firm Thinknum. The move highlights the challenges that Uber faces as it scrambles to prove to Wall Street, since its IPO in May, that it’s on the right track to achieve profitability. The company, with 100 million monthly active users, reported $5.23 billion in losses for the second quarter last week.