Software Systems Engineer

Nationwide IT Services (NIS) is seeking a Software Systems Engineer to support the Defense Logistics Agency’s federal IT application modernization and sustainment program. The role designs, develops, integrates, modernizes, and sustains secure enterprise applications for a Department of Defense mission.

Responsibilities:

• Design, develop, modernize, integrate, and sustain enterprise software applications supporting DoD mission requirements
• Provide technical engineering support throughout the software development lifecycle (SDLC), including requirements analysis, architecture, design, coding, testing, debugging, deployment, and documentation
• Develop and maintain applications using .NET Framework, C#, React, ADO.NET, and dependency injection design techniques
• Support modernization of legacy applications to modern .NET architectures and cloud-based environments
• Design, develop, integrate, and maintain REST APIs to support secure data exchange between internal and external systems
• Develop and enhance front-end and back-end application components to improve system functionality, performance, usability, and maintainability
• Utilize Git and established source code management practices to support version control, collaborative development, and software releases
• Participate in Agile software development activities, including sprint planning, backlog refinement, technical reviews, and iterative application delivery
• Support DevSecOps practices and continuous integration/continuous delivery (CI/CD) pipelines to automate software builds, testing, security assessments, and deployments
• Conduct unit testing, integration testing, debugging, and quality assurance activities to identify and resolve software defects
• Support application security testing, vulnerability remediation, and compliance with DoD cybersecurity standards and secure development practices
• Analyze existing application architectures and recommend technical improvements, system enhancements, and modernization solutions
• Develop and maintain technical documentation, including software design specifications, system architecture diagrams, interface documentation, and testing procedures
• Collaborate with software developers, systems administrators, cybersecurity professionals, and government stakeholders to resolve technical issues and support application modernization objectives
• Support user acceptance testing (UAT), troubleshoot identified defects, and implement corrective actions before production deployment
• Assist with application configuration, integration, performance optimization, and ongoing software maintenance
• Ensure software solutions align with established technical requirements, government standards, and program objectives

Requirements:

• Minimum of five years of relevant software engineering experience
• Experience with .NET Framework, C#, REST APIs, React, Git, ADO.NET, and dependency injection
• Experience designing, developing, integrating, testing, debugging, and maintaining enterprise software applications
• Experience supporting software development, lifecycle activities, application modernization, and technical documentation
• CompTIA Security+ certification
• At least one of the following Microsoft Azure certifications:
  • Microsoft Certified: Azure Developer Associate (AZ-204).
  • Microsoft Certified: Azure Solutions Architect Expert (AZ-305).
  • Microsoft Certified: DevOps Engineer Expert (AZ-400)
• DoD 8140 baseline certification
• Favorable Tier 3/NACLC/ANACI investigation required at the time of proposal submission
• Secret clearance