A Calypso Developer is responsible for designing, developing, and maintaining financial software solutions using the Calypso platform, which is widely used in capital markets for trading, risk management, and processing. They work with Java, SQL, and APIs to customize and integrate Calypso with various financial systems. Their role includes troubleshooting issues, optimizing performance, and ensuring compliance with business requirements. Strong knowledge of financial products such as derivatives, bonds, and FX is often required.