A "full stack" developer is someone who can do all stages of the development of an enterprise level software tool (from design, backend database, security, to data processing, user interface and reporting/business intelligence). That's what I do, mainly on html5 websites, using ASP.Net MVC, Javascript, C# and KendoUI.

I love creating financial applications. Here is a screenshot from one of our latest financial products, Pensions Concerto (an online financial management tool for defined benefit pension plans). Our other products include Wealth Planner (a tool for UK IFAs and high net worth individuals to help them with investment and retirement planning) and WebClubAdmin, an online accounting/administration system for UK clubs.

I firmly believe that the best financial software not only has a good user interface, but also a programming interface so that other software can interact with it, thus maximising reuse and hence the potential of the tools.