Software Systems Engineer

Nationwide IT Services, Inc.; United States; Remote; USD 110,000 - 165,000; Full time

Job summary

Nationwide IT Services is seeking a Software Systems Engineer to support a DoD modernization and sustainment program. You will design, develop, and sustain complex enterprise applications, modernize legacy systems, and ensure secure, scalable software solutions for a DoD mission.

Collaboration with multidisciplinary teams and adherence to DoD cybersecurity standards are essential. The role involves SDLC activities, Agile practices, and DevSecOps integration to deliver secure software releases.

Qualifications

• 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 AZ-204, AZ-305 or AZ-400 (Azure certifications).
• DoD 8140 baseline certification.

Responsibilities

• Design, develop, modernize, integrate, and sustain enterprise software applications supporting DoD mission requirements.
• Provide technical engineering support throughout the 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 techniques.
• Support modernization of legacy applications to modern .NET architectures and cloud-based environments.
• Design, develop, and maintain REST APIs to enable secure data exchange between internal and external systems.
• Develop and enhance front-end and back-end components to improve system functionality, performance, usability, and maintainability.
• Utilize Git and CI/CD practices for version control and releases.
• Participate in Agile software development activities, including sprint planning, backlog refinement, and technical reviews.
• Support DevSecOps practices and automated testing, security assessments, and deployments.
• Conduct unit and integration testing, debugging, and QA activities to resolve defects.
• Assist with application security testing, vulnerability remediation, and compliance with DoD cybersecurity standards.
• Analyze existing architectures and recommend improvements and modernization solutions.
• Create technical documentation including software design specs and architecture diagrams.
• Collaborate with developers, systems admins, cybersecurity professionals, and government stakeholders to resolve issues.
• Support user acceptance testing, troubleshoot defects, and implement corrective actions before production deployment.

Skills

.NET Framework

C#

REST APIs

React

Git

ADO.NET

Dependency injection

Five years experience

Tools

Azure DevOps

ADO.NET tooling

Job description

Software Systems Engineer

Security Requirement: Favorable Tier 3/NACLC/ANACI investigation required at proposal submission. Secret clearance.

Certification Requirements: CompTIA Security+, at least one Microsoft Azure certification (AZ-204, AZ-305, or AZ-400), and DoD 8140 baseline certification.

Position Summary

Nationwide IT Services (NIS) is seeking a highly qualified Software Systems Engineer to support a federal IT application modernization and sustainment program for the Defense Logistics Agency (DLA).

The Software Systems Engineer will design, develop, modernize, integrate, and sustain complex enterprise applications supporting a Department of Defense (DoD) mission. This position requires strong technical expertise in software engineering, application architecture, development, testing, debugging, and system integration.

The successful candidate will modernize legacy applications, develop secure and scalable software solutions, and collaborate with multidisciplinary technical teams to enhance application functionality, performance, security, and reliability.

This position is contingent upon contract award and funding.

Key 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.

Required Qualifications

• 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.

Minimum Education

No specific degree requirement identified in the provided minimum qualifications.

Security Requirements

• Favorable Tier 3/NACLC/ANACI investigation required at the time of proposal submission.

About Nationwide IT Services

NIS is a CVE-verified Service-Disabled Veteran-Owned Small Business and an IT and management consulting company. Our mission is to deliver value-added services to our customers, leveraging technology, people, and industry best practices to implement innovative solutions through our trusted employees and team members.

Our benefits package includes medical, dental, and vision insurance; life and disability insurance; a 401(k) plan with employer match; paid holidays; PTO (sick/vacation); commuter benefits; an employee assistance program (EAP); educational reimbursement; and pet insurance.

Salary Range: To be determined.

The salary range is a general guideline. We consider several factors when determining base salary offers, including the position's scope and responsibilities, the candidate's experience, education, and skills, and current market conditions.