Pros
Trayport has a wide range of products to work on that are used across the finance industry by investment banks, utilities, hedge funds and prop shops. The environment is relaxed and friendly, with more of a software house feel, developers dress casually and there are organised social events once a month. Trayport is strong in technology and not afraid to try out new tools and techniques like C++11, Boost, BDD, NCrunch, R#, Rx and F#. There are internal lightning talks once a month at lunch and invited speakers through the year. Internal training is provided on trading, software development and even presenting. Attending conferences and external training events is also encouraged. Career progression at Trayport is not limited to becoming a manager, you can be rewarded for your technical skills too.
Cons
In the recent past some of the atmosphere was marred by internal politics, however most of the characters involved have now moved on and this is no longer the case.