James King contributed to the openbraininstitute/neurodamus and neuronsimulator/nrn repositories, focusing on backend development and simulation reliability. He implemented a configurable in-memory report buffer, introducing a command-line interface option to fine-tune memory usage for large-scale neuroscience simulations using C++ and Python. James also addressed a bug that caused duplicate stimuli insertion in cells with multi-compartment somas, ensuring correct simulation behavior. In neuronsimulator/nrn, he improved data integrity by restoring ionic concentration type checks during STATE initialization, preventing unnecessary reinitialization when loading CoreNEURON data. His work demonstrated careful attention to simulation correctness, memory management, and robust software testing practices.