Dan Purcell is taking stock of his company’s latest funding round and what’s next. Ceartas, which builds software for finding and removing unauthorised content online, raised $4.5 million (€4.14 million) from investors last month. The start-up has spent years honing its technology and now chief executive Purcell is thinking more about the business side of things. “Technology always needs to be expanded, but it’s mostly to increase the footprint,” he said of the plans for the fresh cash. The company just opened a Berlin office and is planning a base in Los Angeles as it eyes a greater share of…