Software Engineer

Castellum Inc. seeks a Software Engineer to design, develop, and secure mission-critical applications supporting U.S. defense and national security customers. You will build reliable, high-performance software and services, integrate with cyber and electronic warfare systems, and apply secure coding practices across the SDLC. Working in agile teams, you'll collaborate with engineers, analysts, and mission experts to translate operational needs into robust technical solutions. This role offers exposure to cutting-edge defense technologies, disciplined yet entrepreneurial culture, and clear paths for advancement in a fast-growing, acquisition-driven environment.