Citadel Securities is seeking a Senior Platform Infrastructure Engineer to design, build, and maintain high-performance, scalable infrastructure supporting trading platforms. The role involves collaborating with software engineers to develop robust systems, optimizing deployment processes, and enhancing reliability and automation across the infrastructure stack. Candidates should have strong experience in platform engineering, cloud technologies, container orchestration, and infrastructure automation. This full-time position offers the opportunity to work in a fast-paced, innovative environment focused on cutting-edge financial technology.