Senior Software Engineer

About this role

Unissant, Inc. delivers innovative capabilities to the agencies that keep our nation healthy and safe. We apply our domain expertise, data acumen, and technology know-how to achieve breakthrough results for our clients. Working collaboratively, we advance missions and careers through a focus on honesty, integrity, and dependability. We continuously look for talent, excited to join that effort. To learn more about our exciting organization, please visit www.unissant.com.

We are seeking a Senior Software Engineer to join our team and support our client, the Federal Emergency Management Agency (FEMA). This is a remote position.

The ideal candidate is a senior full-stack engineer who will provide technical leadership for application engineering, cloud integration, and platform operations across FEMA's AI portfolio. This individual will build, integrate, modernize, and sustain user-facing and back-end AI services that meet FEMA security, accessibility, performance, and operational requirements.

Essential Duties and 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, b...