Just Eat will create more than 1,500 customer service jobs in north-eastern England in the next 12 months.
The jobs will be based at a new facility in Sunderland as part of a £100m investment in the region by the firm over the next five years.
Currently, the takeaway food firm has more than 2,000 UK-based employees.
New employees will begin working from home and the firm will offer employees the option to work from the office in the coming months.
Just Eat said it had already hired 300 staff in Sunderland and noted that customer satisfaction had gone up as a result.
Previously, the firm had outsourced the majority of its customer service roles to Bulgaria and the Philippines.
Its UK managing director, Andrew Kenny, said the new customer care staff would help bring quality service to their customers and restaurant partners.
“As a platform that covers 95% of UK postcodes, we also know the importance of increasing career opportunities outside of London and the South East,” Mr Kenny said.
“We’re pleased to be announcing our commitment to the North East, to help boost the region’s economy,” he added.
The delivery platform has more than 58,000 restaurant partners across the UK.
Councillor Graeme Miller, leader of Sunderland City Council, said: “We’re thrilled to have supported Just Eat to make its move to Sunderland, joining a dynamic business community and creating jobs and opportunities for people across the city.”
“We’re immensely proud of our skilled people and look forward to seeing how they drive the onward success of the Just Eat business,” he added.
The office, in Houghton le Spring, was previously occupied by Npower and will provide a gym, lounge and catering area across its 20,000 sq-m space.
Just Eat was founded by a group of five Danish entrepreneurs in 2000 and launched a year later.