This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Senior Software Engineer - Secret based in the United States. This role offers the opportunity to build mission-critical software supporting complex military and defense operations. You will work across the full software development lifecycle, developing intuitive web-based platforms and integrating diverse data sources. The position combines modern application development with cloud engineering, DevSecOps, data pipelines, and emerging AI/ML capabilities. You will collaborate with geographically distributed engineering teams and mission stakeholders to prototype, deliver, and continuously improve solutions. Your work will leverage AWS GovCloud, containerized environments, CI/CD automation, and secure data architectures. The role is suited to an experienced engineer who enjoys solving challenging technical problems in a mission-focused environment. You will contribute directly to systems supporting critical government operations while working with experienced professionals across software, cloud, data, and security disciplines.