Senior Software Engineer

Unissant, Inc. delivers innovative capabilities to agencies that keep the nation healthy and safe through domain expertise, data acumen, and technology know-how. The Senior Software Engineer will provide technical leadership across application engineering, cloud integration, and platform operations for FEMA's AI portfolio, building and sustaining secure, accessible, and scalable full-stack AI services.

Responsibilities:

• Lead the architecture, design, development, integration, testing, deployment, and sustainment of full-stack AI applications
• Build user interfaces, APIs, middleware, data services, and back-end components for RAG/chatbot, document-processing, predictive-analytics, and enterprise-automation solutions
• Apply PERN-stack engineering practices using PostgreSQL, Express.js, React, and Node.js; use Terraform for infrastructure-as-code where applicable
• Establish and maintain CI/CD pipelines, source-control practices, automated testing, environment promotion, and observability across FEMA-approved AI platforms
• Conduct system analysis, performance engineering, debugging, root-cause analysis, and technical-debt remediation
• Ensure user-facing deliverables comply with Section 508; support accessibility test plans, test results, and Accessibility Conformance Reports as required
• Develop and maintain architecture diagrams, build and operating plans, interface specifications, security artifacts, user guides, and technical documentation
• Collaborate with AI engineers, data scientists, cybersecurity personnel, product owners, and program stakeholders to deliver secure, scalable, production-ready capabilities

Requirements:

• Five (5) to ten (10) years of experience in full-stack software engineering, application architecture, cloud engineering, DevSecOps, or related technical disciplines
• Demonstrated experience with relational databases, modern web frameworks, Agile/Scrum delivery, software architecture, and system integration
• Proficiency with PERN-stack technologies or comparable modern full-stack technologies; Terraform; CI/CD; git-based code management; and observability tools
• Experience designing accessible user interfaces and testing web applications for Section 508 conformance
• Experience building secure, maintainable, scalable applications and integrating cloud-hosted services, APIs, and enterprise data systems
• Strong technical leadership, documentation, troubleshooting, performance-engineering, and collaboration skills
• Bachelor's or Master's degree in Computer Science, Artificial Intelligence, Machine Learning, or a related technical field required
• Excellent verbal and written communication skills, with the ability to explain architecture, technical risks, accessibility considerations, and solution tradeoffs to technical and nontechnical audiences
• Ability to write clear, concise content and manage sensitive information in a highly confidential manner
• U.S. Citizenship is required
• Favorably adjudicated FEMA Public Trust suitability is required before the employee's start date
• Must comply with DHS/FEMA training, safeguarding, and access-control requirements applicable to FOUO/SBU information and assigned systems
• Cloud, DevSecOps, agile, accessibility, software architecture, or relevant technical certification