Vantaggi
I have worked at some great companies and with good people but Trayport staff were the most talented bunch I have worked with. They welcome opinions and are keen to let you contribute to change and constant improvement. Good social life and very friendly people. Weekend away, good bonus, free breakfast, free drinks, fruit, sponsored socials, lots to add to the benefits of working there. Some staff always see the grass is greener elsewhere, but Trayport treats it's staff better than any company I have worked for before. Quite a few comments re getting sued but I went to work for a client just spoke to them early, they like any firm just need to protect the sensitive commercial interests, definitely don't let this put you off. Lots of good examples of staff moving roles and developing their careers, this has really opened up in the last couple of years.
Svantaggi
You need to get stuck in and not stand on ceremony. Yes some senior politics but generally does not impact most staff. Some legacy technology but it's disappearing gradually as new deliveries come through.