A shareholder dispute is brewing at Barracuda FX, an Irish fintech company acquired in 2019 by New York-based foreign exchange trading provider Broadway Technology. High Court proceedings have been lodged against the US registered firm, along with Broadway Barracuda Holdings LLC, and another group entity, the Dublin-based Ion Investment.  The founder and CEO of Ion is Andrea Pignataro, a former bond trader who is the beneficial owner of Barracuda FX. Ion, a private equity tech investor, has been involved in some mega deals including the €1.7 billion buyout of UK trading tech company Fidessa in 2018 and €1 billion-plus share investment in financial…