Badley (pictured) has been working at Iress for over five years.
A spokesperson told Mortgage Solutions that at this stage no further details about his resignation can be disclosed yet.
Badley said that he is proud of what his team has been able to achieve with and for the clients.
He added: “I wish Iress, its clients and its people all the best for the future.”
Iress chief executive, Andrew Walsh, said: “As we move into the next phase of our growth, Simon has decided now is the right time for him to leave.
“I thank Simon for his passion and dedication.
“He leaves our United Kingdom business in a strong position, with increasing demand for our diversified, independent offering across financial advice, trading, private wealth, mortgage sales and origination and the sourcing of insurance and mortgage products by advisers.
“Simon’s replacement will be made after consideration of internal and external candidates.”
Last week Beneficial Life mortgage network agreed a three-year partnership with Iress which will see the technology firm’s mortgage and protection sourcing system rolled out to member advisers.