I did my Bachelor’s and PhD degrees at the University of Cambridge. My initial research background was in operating systems, hypervisors and the like, with a little networking and distributed systems thrown in. Moving some way up the stack, my PhD work centred on the programmer-facing problem of building software by composition of ill-matched components, for which I developed the Cake language. From January 2011 until March 2012 I was a James Martin Fellow in the Department of Computer Science at the University of Oxford, mostly focused on program analysis and the problem of combining state-space methods (e.g. symbolic execution) with syntactic methods (e.g. type checking). From May 2012 to May 2013, I was a postdoctoral researcher at USI’s Faculty of Informatics in Lugano, Switzerland, working on programmer-facing dynamic analysis infrastructure for Java-like virtual machines. From May until October 2013 I was temporarily a Research Assistant at Oracle Labs, on the Alphabet Soup project, working on native object code and debugging support in the Truffle/SubstrateVM stack. Since 2013 I have been a Research Associate back at the University of Cambridge Computer Laboratory, working on various topics with robustness in low-level programming as a recurring theme. I have also worked (some time ago) for Opal Telecom and ARM, and (more recently) and as a consultant for Ellexus.