It is the top floor of Huckletree, the co-working space on Pearse Street in Dublin 2. Although only in their late twenties, Karl O’Brien and Thomas Gleeson are both already experienced e-commerce experts. The two friends teamed up eight months ago to launch StoreHero, an e-commerce analytics platform that promises to give online retailers real insights into how they make money.  Already, they’ve just raised €600,000 from angel investors to scale the business. O’Brien and Gleeson are both steeped in digital retail. In less than a year of trading, they have secured almost 30 paying customers in Ireland, Britain, the…