The Sequoia Capital-funded company has also appointed former American Express executive Manish Chaturvedi as its Chief Sales Officer.
Sinha, who joined MobiKwik last year, will now be involved in directing, administering, and coordinating the operational activities, MobiKwik said in a statement.
He will also have the mandate to drive multiple CXO-level functions at MobiKwik, it added.
Besides, Chaturvedi will lead partnerships with retailers at MobiKwik and will be responsible for driving acceptance of MobiKwik wallet across formats and industries, the statement said.
MobiKwik has 25 million users and 50,000 retailers on board. Its merchant partners include Uber, Meru Cabs, Big Bazaar, WHSmith India, Cafe Coffee Day, PVR and BookMyShow, among others.