Sr Full Stack Developer Job Description: Sr Full Stack Developer Clearance: TS/SCI w CI Poly. Able to sponsor CI Poly (process can take 6 weeks) Location: 100% Onsite, multiple locations, see below Gaithersburg, MD Tucson, AZ St Louis, MO Mon-Fri: Core hours Salary: Compensation varies depending on location. 140K+ Experience: 8-12 years of relevant development experience Position Overview: We are seeking a highly skilled and motivated Senior Software Engineer with Scrum Master experience to support a mission-critical program. This role involves leading Agile software development efforts, collaborating with cross-functional teams, and delivering complex solutions using modern technologies. The ideal candidate brings a strong technical foundation, leadership in Agile practices, and a proactive approach to continuous learning and problem-solving. Key Responsibilities: Lead and participate in all phases of the software development lifecycle (SDLC), including scope estimation, architecture/design, development, and automated testing. Act as Scrum Master, ensuring team adherence to Agile practices and facilitating key ceremonies (stand-ups, sprint planning, retrospectives). Work closely with the Product Owner and technical leadership to resolve obstacles and prioritize work effectively. Architect, develop, and deploy scalable software solutions in production environments. Break down large tasks into manageable units and provide Level of Effort (LOE) estimates. Collaborate with team members to create and document optimal technical designs. Ensure solutions meet customer requirements, even when those needs are evolving or loosely defined. Promote best practices in software design, code quality, and Agile development. Required Qualifications: Active TS/SCI with CI Polygraph U.S. Citizenship (required by contract) Proven experience as a Scrum Master supporting technical/software development teams. Strong command of Agile methodologies and CI/CD practices. Technical Skills: Web Development: HTML, CSS, Django, JQuery, Ajax, REST APIs Programming Languages: Python, Java, JavaScript Frontend Frameworks: Experience with scripting languages such as React Database: SQL (Relational Databases) Operating Systems: Windows, Linux Version Control: Git, GitLab DevOps & CI/CD: Jenkins, GitLab CI, Docker Cloud Experience: Exposure to multi-cloud environments including AWS, IBM, Google, Azure, and Oracle Familiarity with AWS services such as S3, SQS, SNS, EC2, CloudFormation, and RDS Preferred: AWS DevOps Engineer or similar cloud certification Software Architecture: Client-Server, Model-View-Controller (MVC) Deep understanding of modern software design patterns and coding standards Ideal Candidate Traits: Strong self-motivation and a desire to continuously learn new tools, languages, and technologies. Ability to lead within an Agile environment while still contributing technically. Capable of balancing big-picture architecture with detailed implementation tasks. Excellent communication and collaboration skills.