Goldman Sachs has an in-house programming language, Slang, used for its critical pricing and risk applications (SecDb). I will share my team’s experiences of using Truffle and Graal as we headed along the path to turn it into a JVM language. I will showcase how we have approached modernising and speeding-up our Slang interpreter and tooling whilst not breaking our complex dynamic type system, our 25 year-old, native C++ code base and more than 150 million lines of (often mission-critical) Slang code.

I am an Indian-Scot working as a Software Engineer at Goldman Sachs, on the SecDb Architecture team. I recently graduated with a Masters in Computer Science from Trinity College at the University of Cambridge, where I specialised in verification and programming languages. When not coding or thinking about coding, I can be found reading fairy-tales, learning about philosophy, dancing to Hindi film songs or teaching a new generation of CompScis on the joys of PL research.