Poing is a protein structure and folding model, designed to predict the tertiary structure of a protein from its sequence. I’ve been developing Poing for five years, after moving into computational biology from a background in software engineering. I’ve tried to keep the engineering ethos whilst dealing with the vagaries of scientific enquiry. My talk will focus on the engineering aspect, and how I’ve used a combination of C++, Python, various Python libraries, Subversion and server farms to produce a fairly slick workflow for both software engineering and developing and using the protein structure model. I will also talk about what I would have done differently with the benefit of hindsight.