Software Systems Engineer

Nationwide IT Services, Inc.; Fairfax (VA); On-site; USD 120,000 - 160,000; Full time

Benefits offered by this job

Medical, dental, and vision insurance

Life and disability insurance

401(k) plan with employer match

Paid holidays

PTO (sick/vacation)

Commuter benefits

Educational reimbursement

Pet insurance

Job summary

Nationwide IT Services (NIS) is seeking a Software Systems Engineer to support a DoD modernization and sustainment program. You will design, develop, integrate, and sustain complex enterprise applications ensuring security, scalability, and reliability across DoD systems.

The role requires hands-on work with .NET, C#, React, REST APIs, CI/CD, and DevSecOps; DoD cybersecurity standards and documentation are essential.

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, and maintaining enterprise software applications.
• Experience supporting modernization, documentation, and cybersecurity compliance (DoD).
• DoD 8140 baseline certification and security certifications (Security+ and Azure certs).

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, deployment, and documentation.
• Develop and maintain applications using .NET Framework, C#, React, ADO.NET, and DI techniques.
• Support modernization of legacy applications to modern .NET architectures and cloud-based environments.
• Design, develop, and maintain REST APIs for secure data exchange.
• Develop front-end and back-end components to improve functionality, performance, usability, and maintainability.
• Utilize Git and source code management practices for version control and releases.
• Participate in Agile development, sprint planning, backlog refinement, and reviews.
• Support DevSecOps practices and CI/CD pipelines for builds, testing, security assessments, and deployments.
• Conduct unit/integration testing and QA to identify and resolve defects.
• Assist with security testing, vulnerability remediation, and DoD cybersecurity compliance.
• Analyze existing architectures and recommend improvements and modernization solutions.
• Develop and maintain technical documentation and testing procedures.
• Collaborate with developers, admins, cybersecurity professionals, and stakeholders to resolve issues.

Skills

.NET Framework

C#

REST APIs

React

Git

ADO.NET

Dependency injection

Tools

ADO.NET

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.

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.

• 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.

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 SummaryNationwide 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.