DoD Software Systems Engineer — .NET, REST & Azure

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

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.