Pros
I have worked in Ion for a year and I must say, its not as bad as other reviewers make the firm out to be. In terms of products, Reval is the leading (if not the top) treasury management software systems in the world servicing Fortune 500 companies. Dealogic has the most comprehensive primary markets data that dates back a longer time frame than any other provider out there. So in terms of growth, there are tons of opportunities within the firm across all 5 of its verticals.. Since it is a huge company, there is a huge network of B2B products and skills to learn from. The firm also has a strong standing in working abroad, and this has opened people to countless opportunities to travel, relocate and even work remotely from across the world. This is something not common in other large firms (one of the largest privately held fintech companies today).
Cons
The way Ion grows is by acquiring other companies on a grand scale. This can create some culture/ logistical entanglements whenever a new company is bought. This is however not to say that working for Ion is bad - this just results in a lot of unhappy people who decided to leave upon acquisition joining competitors and giving Ion a bad rep. In actuality, management has been taking active steps to integrate newer members into the umbrella. Weekly initiatives to bring divisions together, parties to invite welcome newer acquisitions in the office, breakfast provided in the Jersey office and an open bar booked out restaurant holiday party are just few of the examples.