Jayson Virissimo is a Full-Stack Developer and Engineering Manager. He has created Boethius, a web application for learning the classical liberal arts, including grammar, arithmetic, geometry, and astronomy. He also developed Production Syllogism, a Ruby library to check if individual statements are well-formed formulas in Aristotelian logic and whether whole arguments are valid or are of the same logical form. Jayson created MemorizeOnline, a web application for learning the epic poem of the Portuguese people using spaced-repetition principles. Additionally, he developed WeightedList, a Ruby library that lets users sample and shuffle a weighted list.