The deal was worth more than $2 million, he said.
The Indian company also had the rights to sell the Speedfloor system to other firms within India, he said.
Stubbing said the technology would be used to construct housing for workers at a new steel and electricity plant in the state of Orissa, which would employ around 30,000 staff.
"They're basically building a city - it's going to have schools, shopping centres and things like that," Stubbing said.
He said Jindal Steel & Power, which had an annual revenue of more than US$3 billion ($3.6 billion), would also use the Speedfloor system at another plant being constructed in Raigarh.
Another arm of the company, called Jindal Urban Design, would use the technology to build apartment blocks in "satellite cities" around India's major centres, he added.
"Speedfloor technology ... means the building goes up very quickly and the lightweight steel joist can be installed without delays in curing times for concrete and things like that."
Locally, Speedfloor has been used to construct buildings including the Auckland Hospital carpark.
Stubbing said Speedfloor's future lay in emerging markets and the firm had been fielding inquires from Turkey and Qatar.