Senior Software Engineer – Go / Node.js

Concept Solutions, LLC (CS) is seeking an experienced Senior Software Engineer – Go / Node.js to join a team responsible for building, modernizing, and sustaining mission-critical applications for a Department of War (DoW) customer.

In this role, you will develop, enhance, and maintain high-volume, public-facing applications while supporting secure cloud operations and application modernization. The ideal candidate brings strong backend engineering expertise in Node.js or Go, experience supporting production applications, and a commitment to delivering reliable, secure, and scalable software solutions.

• Sustain and enhance high-volume, public-facing web applications, resolving defects, applying security patches, and delivering releases under formal change control processes.
• Develop and maintain backend services using Node.js and Go, with React/TypeScript front-end applications and PostgreSQL databases.
• Support containerized application deployments in cloud environments.
• Integrate applications with identity providers and shared platform services to enable secure, seamless functionality.
• Maintain technical documentation, operational runbooks, and application sustainment procedures.
• Participate in on-call rotations to support production application availability and incident resolution.
• Identify and remediate security findings, address vulnerabilities, and maintain current software dependencies.
• Collaborate with engineering and operations teams to ensure application reliability, performance, and security.