An algorithmic trading developer designs, implements, and maintains computer algorithms that carry out automated trading on financial markets. They develop models to predict market behaviors and create algorithms to execute trades at optimal times. They work closely with data scientists to analyze large data sets, identify trading opportunities, and build strategies to maximize profits and minimize risks. They also ensure the robustness and efficiency of the trading systems, troubleshoot issues, and refine algorithms based on performance feedback. Their role requires a strong background in computer science, mathematics, and financial markets.