According to the group, 300 of the 1,000 jobs will be supporting the government’s Kickstart initiative.
PizzaExpress reopened 118 restaurants in England for alfresco dining on 12 April, with another 24 set to relaunch on 29 April.
All 360 pizzerias in the UK will reopen for indoor dining in May in line with local government guidance.
During 2020 approximately 2,400 roles across PizzaExpress' UK business were made redundant.
The group also closed 74 restaurants as part of a Company Voluntary Arrangement (CVA), which was approved by creditors in September last year as part of a major recapitalisation and restructuring that also saw the business deleverage its debts, provide new liquidity and divest its mainland China business.
An additional 23 sites were subsequently returned to landlords.
Regarding the new recruitment drive, PizzaExpress managing director Zoe Bowley said: "We're expecting millions of people to flock back to restaurants as restrictions are eased, so we are delighted to be in a position to be able to recruit a thousand new team members to help us serve customers at PizzaExpress. We are also very pleased to support the Kickstart initiative.
"Our restaurants have been the beating heart of our local communities and neighbourhoods for decades. As well as helping locals to get together with friends and family, we support 360 local economies across the UK as an employer for anyone looking for a fun, flexible and rewarding career.
"Our pizzerias are a great place to work, and our teams love welcoming new colleagues. After all the challenges and uncertainties of the last year, we're very excited to be open and recruiting again."