Immutable, one of Australia’s most heavily funded technology companies, has suffered a tumultuous year behind the scenes – several senior executives have resigned, and the company has shed a third of its staff.

The company’s chief financial officer and interim chief commercial officer, David Bicknell, and chief legal officer Ed Bunting told staff on Friday they had quit. Their exits followed chief commercial officer Jason Suen, who left last August and chief operating officer Gillian Findlay, who left in February.