On mobile, I’ve got most experience with Android, having ported the successful Get Running running trainer to Android, but I’m familiar with Objective C and UIKit, too. I’ve got paid apps in both the Play Store and the iOS App Store that are bought daily. Get Running has sold more than 15,000 copies and averages 4.6 stars in its reviews.
On the web, I mostly do server-side work in PHP, though I’m dabbling in Ruby on Rails. I'm a back-end developer, not a designer, but I’ve got a good grasp of HTML5 and CSS, and understand the principles of semantic markup and responsive web design. I’ve used heavier frameworks like Symfony, and developed sites in CMSes like WordPress and concrete5.
Most of my financial services sector work has been on the Microsoft platform. I’ve got an excellent grasp of SQL Server, and good experience with SQL Server Integration Services. I've done a lot of data warehousing work, including working with Informatica Power Center ETL, and Oracle.
I’m also an old-school VB6 hacker, if you need any legacy systems changed, though I’ve got reasonable exposure to more recent .NET stuff, too.
I’m unlikely to be phased by your choice of OS, version control, dependency management or deployment systems. I pick things up pretty quickly.
I’ve worked solo and as part of big teams. I get on with people and communicate well.