In 2014 LMAX Exchange traded over $1 trillion dollars. The Sunday Times named us the fastest growing tech company in the UK and we previously won Oracle’s Duke's Choice Award for the most innovative programming framework.In this talk we reveal how we develop software. We cover all aspects from our design philosophy, how we practice agile to our continuous integration pipeline and show how far you can go with automatically testing everything.

When you learn Java or any other programming language you usually start by looking at the basics of the type system and how the arithmetic operations work. You learn how numbers are represented and what types of numbers your programming language offers to you. At the same time, one of the first rules that you learn in Java is that implicit casting only occurs when you are doing a “safe” conversion, otherwise you need to explicitly tell your compiler that you understand what you are doing.