Position Description: Full Stack Engineer – Senior will support application design, development, integration, and modernization for a major federal transformation program. This senior role develops secure, scalable, cloud-ready solutions and works across the entire stack—front-end, back-end, APIs, databases, and cloud environments. The Full Stack Engineer collaborates with Product, DevSecOps, Cloud, Data, QA, and Migration teams to deliver mission-critical capabilities that meet federal performance, security, and compliance standards. Primary Responsibilities: Application & API Development · Design, develop, and maintain front-end and back-end components for enterprise applications · Build and optimize REST APIs, microservices, and system-to-system integrations · Ensure code quality, performance, and maintainability across the full stack Cloud-Ready Engineering · Develop cloud-compatible services and applications (AWS preferred) · Support deployment of pipelines, infrastructure integration, and CI/CD workflows · Align application architecture with modernization and cloud migration requirements Technical Leadership & Collaboration · Collaborate with Scrum Masters, Product Leads, QA Automation Engineers, Cloud Engineers, and Data Engineers · Participate in sprint planning, backlog refinement, technical design reviews, and demos · Mentor mid-level engineers and support knowledge-sharing across teams Security, Performance & Compliance · Implement secure coding practices, logging, auditing, and data-handling requirements · Conduct performance tuning, optimization, and reliability improvements · Ensure delivery aligns with federal security standards and program governance Testing & Quality Support · Support automated testing and validation of application functionality and integrations · Troubleshoot defects across the stack and coordinate with QA to resolve issues · Validate readiness for release and major deployment events Documentation & Reporting · Develop technical design documents, API specifications, data flow diagrams, and code documentation · Maintain full-stack engineering artifacts required for release, sustainment, and audits · Provide status updates and technical insights to leadership and cross-functional teams Required qualifications to be successful in this role: · Must have an Active Top Secret Security Clearance, U.S. Citizenship · Bachelor’s degree and 8+ years of experience in software engineering or full-stack development · Experience developing both front-end and back-end solutions using modern frameworks · Hands-on experience with APIs, microservices, relational and NoSQL databases · Experience with CI/CD pipelines, Git, DevSecOps environments, and automated testing · Strong ability to troubleshoot issues across the entire stack · Excellent communication and documentation skills Preferred Qualifications: · Experience supporting DOJ, FBI, Intelligence Community, or other national-security programs · Experience with cloud-native architectures (AWS strongly preferred) · Familiarity with containerization (Docker), orchestration (Kubernetes), or serverless frameworks · Experience with performance engineering, load testing, or automated quality pipelines · Knowledge of Python, Java, JavaScript/TypeScript, or similar languages used across full-stack systems