Demo

Software Developer-Senior Level

Nationwide IT Services, Inc.
Fairfax, VA Full Time
POSTED ON 5/22/2026
AVAILABLE BEFORE 6/19/2026

Software Developer: Senior Level

Clearance Requirement: Secret Clearance required

Employment Type: Full-time

Certification- IAT Level I

Position Overview

Nationwide IT Services, NIS, is seeking an experienced Software Developer to support the design, development, enhancement, and maintenance of complex enterprise software applications and operating systems environments. The candidate will be responsible for developing, testing, debugging, and documenting software solutions while supporting mission-critical operations and infrastructure.

The ideal candidate will have strong experience with Microsoft .NET technologies and a background supporting secure, large-scale government or enterprise environments.

Key Responsibilities

  • Formulate and define specifications for complex software programming applications.
  • Design, develop, test, debug, and maintain software applications and services.
  • Modify and enhance existing software applications using engineering releases and utilities from software manufacturers.
  • Support operating system maintenance activities, including advanced file maintenance routines, telecommunications networks, and enterprise software packages.
  • Participate in all phases of the Software Development Life Cycle (SDLC), including requirements analysis, design, development, integration, testing, deployment, and maintenance.
  • Develop and maintain technical documentation for software applications and system processes.
  • Evaluate new and existing software products and recommend improvements or enhancements.
  • Collaborate with system administrators, cybersecurity personnel, and project stakeholders to ensure secure and efficient system operations.
  • Troubleshoot software and system issues in both development and production environments.

Minimum Requirements

  • Minimum of five (5) years of relevant software development experience.
  • Strong experience developing applications using Microsoft .NET technologies,
  • Experience with software testing, debugging, and configuration management.
  • Knowledge of secure coding practices and enterprise application development.
  • Experience supporting complex operating environments and enterprise systems.
  • Relevant certification from a nationally recognized technical authority.
  • DoD Approved 8570 Baseline Certification – IAT Level I.

Desired Skills

Strong analytical and problem-solving skills.

Excellent verbal and written communication abilities.

Ability to work independently and collaboratively in a team environment.

Strong organizational and documentation skills.


About Nationwide IT Services

NIS is an IT and Management consulting company and a CVE-verified Service-Disabled Veteran-Owned Small Business. 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, 401(k) plan with employer match, paid holidays, PTO (sick/vacation), commuter benefits, employee assistance program (EAP), and educational reimbursement, along with Pet Insurance.


Nationwide IT Services, Inc. provides equal employment opportunities (EEO) to all qualified applicants for employment without regard to race, color, religion, sex, national origin, sexual orientation, gender identity, genetics, disability, or protected veteran

Salary.com Estimation for Software Developer-Senior Level in Fairfax, VA
$117,862 to $143,413
If your compensation planning software is too rigid to deploy winning incentive strategies, it’s time to find an adaptable solution. Compensation Planning
Enhance your organization's compensation strategy with salary data sets that HR and team managers can use to pay your staff right. Surveys & Data Sets

What is the career path for a Software Developer-Senior Level?

Sign up to receive alerts about other jobs on the Software Developer-Senior Level career path by checking the boxes next to the positions that interest you.
Income Estimation: 
$123,167 - $152,295
Income Estimation: 
$146,673 - $180,130
Income Estimation: 
$107,385 - $134,565
Income Estimation: 
$128,473 - $158,030
Employees: Get a Salary Increase
View Core, Job Family, and Industry Job Skills and Competency Data for more than 15,000 Job Titles Skills Library

Job openings at Nationwide IT Services, Inc.

  • Nationwide IT Services, Inc. Alexandria, VA
  • Database Administrator — Journeyman Location: Washington, DC area Start Date: September 1, 2026 Clearance: T5 investigation / clearance required Experience... more
  • 7 Days Ago

  • Nationwide IT Services, Inc. Columbia, DC
  • Management Analyst III (HIPAA) Full Time or Part Time Ability to Obtain HHS Public Trust Level II Onsite or Remote Nationwide IT Services is seeking a Mana... more
  • 14 Days Ago

  • Nationwide IT Services, Inc. Pentagon, VA
  • Force Development Analyst, Senior Clearance: Secret Work Location: 5 days onsite at the Pentagon Nationwide IT Services, NIS, is seeking a Scientific & Eng... more
  • 15 Days Ago


Not the job you're looking for? Here are some other Software Developer-Senior Level jobs in the Fairfax, VA area that may be a better fit.

  • Staffed4U Alexandria, VA
  • Location: Alexandria, VA Clearance Required: Secret Telework: Up to 80% We are seeking Software Developers at the junior, mid-level, and senior levels to d... more
  • 1 Month Ago

  • Custom Software Systems Inc. Washington, DC
  • Custom Software Systems, Inc. (CSS) is seeking a skilled SAP ERP Senior Level Consultant . T he contractor will provide project management expertise , coor... more
  • 26 Days Ago

AI Assistant is available now!

Feel free to start your new journey!