This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a R&D DevSecOps Engineer based in United States. This is a hands-on engineering role focused on building secure, AI-enabled software for mission-critical government and defense environments. You will work across backend development, generative AI, application modernization, and DevSecOps to turn emerging technologies into operational capabilities. The role combines software engineering with the design of secure controls for AI-assisted development and automated software delivery. You will help modernize legacy application portfolios while building reliable, auditable, and compliant engineering workflows. Working closely with software, platform, cybersecurity, and mission teams, you will move R&D concepts toward real-world deployment. This is an opportunity to shape how AI and modern engineering practices are applied in highly secure and constrained environments.