Sr. Full Stack Engineer

Sr. Full Stack EngineerCGI Federal is seeking a Full Stack Engineer – Senior to 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.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 stackCloud-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 requirementsTechnical 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 teamsSecurity, 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 governanceTesting & 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 eventsDocumentation & 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 teamsRequired 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 skillsPreferred 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 systemsDue to the nature of this government contract, US Citizenship is required.What you can expect from us:Together, as owners, let's turn meaningful insights into action. Life at CGI is rooted in ownership, teamwork, respect and belonging. Here, you'll reach your full potential because… You are invited to be an owner from day 1 as we work together to bring our Dream to life. That's why we call ourselves CGI Partners rather than employees. We benefit from our collective success and actively shape our company's strategy and direction.Your work creates value. You'll develop innovative solutions and build relationships with teammates and clients while accessing global capabilities to scale your ideas, embrace new opportunities, and benefit from expansive industry and technology expertise.You'll shape your career by joining a company built to grow and last. You'll be supported by leaders who care about your health and well-being and provide you with opportunities to deepen your skills and broaden your horizons. Come join our team—one of the largest IT and business consulting services firms in the world.