The telecoms giant said around 90 posts will be in the Highlands and Islands, with the rest spread between Glasgow, Edinburgh, Dundee, Dumfries, Galashiels and Aberdeen.
The workers are being offered fixed-term 18-month contracts.
Brendan Dick, director of BT Scotland, said: "The advance of fibre broadband across Scotland is good news in more ways than one. Faster broadband will help to fuel local economies across rural and urban Scotland and the jobs we're creating are part of that.
"We're looking for dynamic, customer-focused people with a can-do attitude who'll help build the network infrastructure and deliver fibre products and services into homes and offices in and around these towns and cities.
"It's skilled, interesting work which will give the successful recruits the chance to gain experience in a fast-paced, constantly evolving industry and be at the forefront of connecting communities to the future."
Highlands and Islands Enterprise is leading the £146 million roll out of fibre across the region.
Carroll Buxton, director of regional development for HIE, believes businesses, communities and individuals will benefit from reliable and fast connections.
She added: "The new jobs being created during the implementation phase are an additional benefit and HIE welcomes the opportunity for individuals in the region to take advantage of them to establish a career in this growing sector."