With the recent focus on tech multinationals cutting jobs and forecasts, the cautious optimism emerging from Pinterest’s latest company information shows that there is another side to the coin of Silicon Valley firms’ presence in Ireland. The picture-based social network’s Dublin-based subsidiary Pinterest Europe doubled its revenue to $456 million last year, new documents show. This amounts to the vast majority of its sales outside the US. It also added 100 people to its workforce, employing 235 last year. The bulk of hiring was in sales as the firm rolled out advertising and online shopping features to monetise users in…