THIS IS THE second year on our list for this specialist recruitment agency, which has climbed 45 places in our rankings. London-based X4 Group finds jobs for people in IT, engineering and the pharmaceutical and medical device industries. Its young staff — 84% are under 25 — say there are plenty of opportunities to learn and grow at work (an 87% positive score).They say their training is of great benefit (90%, second), and rate X4 highly when it comes to financial rewards. More than half of the workforce earns in excess of £35,000 and there are benefits such as free gym membership. www.x4group.co.uk

