A Kaplan-Meier survival analysis developer creates statistical models to estimate the survival distribution of a population, often in medical research. They use the Kaplan-Meier method to calculate probabilities of survival over time, considering factors such as participants dropping out or events not occurring during observation. This analysis provides insights into the effectiveness of treatments or interventions. The developer's role involves data collection, cleaning, and analysis, ensuring correct application of the Kaplan-Meier technique, and interpreting and communicating results. They also manage confounding variables, handle missing data, and maintain statistical software and coding.