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Senior Software Engineer Security Clearance

Job in McLean, Fairfax County, Virginia, USA
Listing for: Gridiron IT Solutions
Full Time, Part Time position
Listed on 2026-01-01
Job specializations:
  • Software Development
    Software Engineer, Full Stack Developer
Salary/Wage Range or Industry Benchmark: 109000 - 220000 USD Yearly USD 109000.00 220000.00 YEAR
Job Description & How to Apply Below
Position: Senior Software Engineer with Security Clearance
SME/Senior Software Developer

Location:

Mclean, VA
Work Type:
Onsite
Remote Work: NO

Job Description Gridiron IT is seeking a highly motivated and independent SME/Senior Software Developer to take sole responsibility for maintaining and supporting a critical legacy application within the Intelligence Community (IC). Responsibilities Independently managing all aspects of the application, from bug fixes to feature enhancements
Designing, developing, and modifying software systems, with a focus on Enterprise Software and User Interface Application Development
Producing detailed specifications and writing high-quality, efficient code
Reverse engineering existing code to understand system functionality
Implementing updates and patches to ensure continued operation
Documenting processes and system architecture for future reference
Providing user support and troubleshooting issues as they arise
Evaluating potential modernization or replacement options for the long-term
Designs and develops visually-pleasing, content rich, user-friendly interfaces with intuitive navigation
Analyzes and studies customer requirements to determine the most effective software technologies to satisfy their needs
Designs, creates, tests, and maintains software-based applications to satisfy customer requirements
Provides software process management and configuration management throughout the software development lifecycle
Resolves problems with software and responds to suggestions for improvements and enhancements
Supports software architecture development, requirements analysis, process execution and evaluation, selection and evaluation of COTS/GOTS tools, and integration (with both new and legacy systems)

Required Qualifications Must Bachelor’s degree and 10+ years of experience. In lieu of a bachelor’s degree 12 years of experience if AA/AS, or 14 additional years of experience with HS diploma.
Must have experience with Agile
Excellent problem-solving skills and the ability to work autonomously
Versatility to handle multiple aspects of software development and support
Strong communication skills to liaise with stakeholders and users
Experience producing high-quality work independently while adapting agile principles to a solo development environment Experience providing software demonstrations once a quarter to the customer
ASP.Net
C#
LINQ and entity framework Object Relationship Mapping (ORM)
Python
Java Script
CSS
SQL / MySQL Server
Visual Studio workstations and some Eclipse
ISS Web Servers hosting
XML and PDF generation
Desired:
Jira
Git
SMTP
AWS (EC2, S3, RDS Object Storage)
Service Now development
Share Point
PostgreSQL
Clearance Applicants selected will be subject to a security investigation and may need to meet eligibility requirements for access to classified information. Requires TS/SCI with a CI Polygraph. Compensation and Benefits Salary Range: $109,000 - $220,000/yr (Compensation is determined by various factors, including but not limited to location, work experience, skills, education, certifications, seniority, and business needs. This range may be modified in the future.)

Benefits:
Gridiron offers a comprehensive benefits package including medical, dental, vision insurance, HSA, FSA, 401(k), disability & ADD insurance, life and pet insurance to eligible employees. Full-time and part-time employees working at least 30 hours per week on a regular basis are eligible to participate in Gridiron’s benefits programs. Gridiron IT Solutions is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, pregnancy, sexual orientation, gender identity, national origin, age, protected veteran status or disability status.

Gridiron IT is a Women Owned Small Business (WOSB) headquartered in the Washington, D.C. area that supports our clients' missions throughout the United States. Gridiron IT specializes in providing comprehensive IT services tailored to meet the needs of federal agencies. Our capabilities include IT Infrastructure & Cloud Services, Cyber Security, Software Integration & Development, Data Solution & AI, and Enterprise Applications.

These capabilities are backed by Gridiron IT's experienced workforce and our commitment to ensuring we meet and exceed our clients' expectations.
Position Requirements
10+ Years work experience
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