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Senior Principal Software Engineer; Secret Clearance Onsite

Job in Oakton, Fairfax County, Virginia, 22124, USA
Listing for: General Dynamics Information Technology
Full Time position
Listed on 2026-05-22
Job specializations:
  • Software Development
    Software Engineer, Senior Developer
Salary/Wage Range or Industry Benchmark: 120000 - 150000 USD Yearly USD 120000.00 150000.00 YEAR
Job Description & How to Apply Below
Position: Senior Principal Software Engineer (Secret Clearance Preferred Onsite Required)

SOFTWARE ENGINEER SR PRINCIPAL

GDIT is seeking a Principal Software Engineer to join our team.

This challenging and interesting software engineering and development position is a chance to participate in the development and operation of a high‑performance big data system, and join a longstanding, stable program consisting of a team of individuals using defined Agile software principles and practices.

As a Senior Principal Software Engineer, you will lead and perform software requirements analysis, design, development, testing, maintenance and participate in research of an operational big data system. The Senior Principal Software Engineer focuses on proficiency and quality of software and application development and programming to deliver solutions to complex problems. You will tailor cutting‑edge solutions to the unique requirements of our clients.

Additionally, the Senior Principal Software Engineer may mentor and coach other software engineers.

US Citizenship is required. DoW active Secret clearance is preferred. If a candidate does not have an active clearance, GDIT will sponsor the clearance upon contingent offer. The work must be performed onsite (no remote work).

WHAT YOU’LL NEED TO SUCCEED

Bring your engineering expertise along with a drive for innovation to GDIT.

  • Demonstrated understanding and technical expertise in applied software engineering concepts, principles and applications
  • Experience with database technologies, SQL, ETL, indexing and performance including contextual data
  • In‑depth understanding of object‑oriented and functional programming, design patterns, data structures and algorithms
  • Proven ability to create high performance applications using Modern C++ (versions 11/14/17/20) applied in a Linux development environment
  • Proven experience in scripting languages including Bash, Ruby and Python
  • Experience with data modeling and No

    SQL database technologies such as MongoDB
  • Experience with parallel and multi‑threaded programming and multi‑process applications
  • Proven experience with very large databases/big data/enterprise data warehouses
  • Experience with memory architectures (NUMA) and caching
  • Expertise in applying techniques for improving performance such as profiling, avoiding memory allocation/de‑allocation, parallelization and algorithms
  • Required Experience:

    10+ years of related experience
Preferred Skills
  • Education:

    Bachelor's (4 year) degree in software engineering or related technical field OR a minimum of 14 years of equivalent work experience
  • Experience with Azure Cloud development
What sets you apart:
  • Ability to interact and collaborate effectively with project teams, managers, and end users
  • Maintain commitment to ongoing professional development
  • Be able to grasp and apply new information quickly and handle increasing responsibilities with growing complexity
  • Be a creative and innovative thinker with the ability to multi‑task
CLEARANCE REQUIREMENTS

Department of War Secret security clearance is required before starting on the program. Applicants selected will be subject to a government background investigation and must meet eligibility and suitability requirements. Due to the nature of work performed within our facilities, U.S. citizenship is required.

GDIT IS YOUR PLACE
  • 401K with company match
  • Comprehensive health and wellness packages
  • Internal mobility team dedicated to helping you own your career
  • Professional growth opportunities including paid education and certifications
  • Cutting‑edge technology you can learn from
  • Rest and recharge with paid vacation and holiday
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Position Requirements
10+ Years work experience
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