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Senior C# Software Engineer, #4151

Brief Description

LinQuest is seeking a Senior Software Engineer with C# development skills to join our team at our office in Dayton, OH.

The GIANT team is looking for talented and motivated engineers to advance the state of the art of Position, Navigation and Timing (PNT) modeling and simulation (M&S). The Global Position System (GPS) Interference And Navigation Tool (GIANT) is employed by engineers and operators throughout the US DoD and by our allies to design, test, train, and operate both current and future PNT capabilities in realistic, challenging Navigation Warfare (NAVWAR) scenarios. As a Software Engineer, you will join a fast-paced agile team to create and integrate new algorithms and sensor models, develop and integrate interfaces, and ensure continuous improvement of the software and associated databases. Engineers on this interdisciplinary team collaborate to deliver a complete software capability, covering everything from working with customers to define an operational need through deployment and training, to enable our warfighters to fight through a contested environment.


As a Senior Software Engineer, you will develop engineering software to predict the performance of current and future GPS and other PNT sensors in operational scenarios. Tasking includes implementing algorithms to simulate the performance of GPS, communication system, and sensor performance; developing graphical user interfaces (GUIs) for configuration and data visualization; and creating application programming interfaces (APIs) to provide other applications access to the core simulation features. Engineers provide support for the complete software development life cycle including design, integration, technical documentation, and testing.




  • Perform software design and development in C#, Python and SQL
  • Collaborate with systems engineers and subject matter experts to refine requirements
  • Support test execution, troubleshooting, and defect resolution
  • Develop and review software designs for appropriateness, completeness, and recommend changes to support project objectives
  • Review and assess designs for compliance with computer/network security best practices
  • Select and implement technologies to modernize the system architecture


 Required Skills and Experience: 


  • Bachelor’s degree in software engineering, computer science, or related discipline
  • 10 years of experience in software engineering
  • Experience with C# and SQL
  • Experience designing and integrating application programming interfaces (e.g., REST)
  • Experience with software optimization and performance tuning tools and techniques
  • Experience developing high-performance parallel software
  • Experience with continuous integration process and tools
  • Excellent written and verbal communication skills
  • Ability to travel up to 10%
  • US Citizenship and the ability to obtain a DoD Secret Security Clearance is required


Preferred Skills and Experience:


  • Master’s degree in software engineering, computer science, or related discipline
  • Experience working as a member of an agile software development team (e.g., Scrum, Kanban)
  • Experience developing modeling and simulation software
  • Experience planning and leading projects
  • Experience working with Global Navigation Satellite Systems (GNSS), Global Positioning System (GPS), GLONASS, or Galileo
  • Experience developing and/or applying alternative PNT sensor and communication system models
  • Experience developing cross-platform software on both Linux and Windows operating systems
  • Experience with Microsoft SQL Server, Entity Framework and ASP.NET MVC
  • Experience with C++
  • Experience with Python
  • Experience developing microservices
  • Experience with geospatial markup languages
  • Experience developing desktop graphical user interfaces
  • Experience with secure application development practices
  • Experience using and interpreting the results of static code analysis tools


We are an Equal Opportunity Employer, we are committed to providing a work environment that values and respects each Team Member as an individual and important member of our culturally diverse organization. In keeping with this commitment, the Company is dedicated to providing a work environment free from any type of discrimination based upon race, color, religion, national origin, ancestry, gender, pregnancy, age, sexual orientation, gender expression and identity, covered veteran and military status, marital status, disability, medical condition, genetic characteristics, political affiliation, or any other classification protected by law. This commitment and policy applies to all areas of employment.

Company Name:
Security Clearance:
Beavercreek, Ohio
United States
Not Specified
Job Number:

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