Barking and Dagenham Council has inked a £160 million outsourcing deal with IT services firm Agilisys.
As part of the council's Elevate East London scheme, the outsourcing deal will provide a range of service that the council says "will deliver improved customer service, better value for money and significant savings to council taxpayers".
Elevate is intended to offer outsourced services to other east London councils and local organisations.
Around 350 staff from both Agilisys and the council have transferred to the new venture.
The council said there were plans "to develop local opportunities and create hundreds of new jobs over the next 7-10 years" through the development of an East London Regional Centre.
The partnership will initially focus on IT, customer services, revenues and benefits, and procurement.
Councillor John White, who will become a director on the Elevate board, said: “This is an innovative step for the council which will be at the leading edge of transforming services so that residents get the excellent services they expect.
"I am looking forward to Agilisys being a major partner in Barking and Dagenham, helping us all to create the right environment for economic development in the borough.”
At the turn of last year, two other east London councils confirmed a technology partnership to save cash. Newham and Havering councils set up a joint ICT support service to save money in the face of government central funding cuts.
Under the East London Solutions partnership, which consists of the boroughs of Havering, Barking and Dagenham, Newham, Redbridge, Waltham Forest and Tower Hamlets, the councils have all agreed to identify joint areas of work to deliver efficiencies.