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2,033 c engineer jobs at 481 companies in Frederick, MD

3mo
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C/C++ Software Engineer
McLean, Virginia, United States
$97k-$162k/yr OnsiteFull Time
American Systems
American Systems: Providing engineering and IT solutions to federal government agencies.
8+ YOEU.S. citizen; secret clearance; Bachelor's in CS/Engineering/Math/Physics (Master’s preferred); 8+ years in real-time, Linux C/C++ systems; sensor data processing and radar/surveillance experience.
C/C++, Linux, Perforce, Git, Radar, Sensor Fusion, GIS
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1mo
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Mid-level C++ Software Engineer
Manassas, Virginia, United States
$119k-$132k/yr OnsiteFull Time
General Dynamics Mission Systems
General Dynamics Mission SystemsNYSE: GD: Designs and manufactures defense and mission-critical technology solutions.
5+ YOEBachelor's in computer/software/engineering or related STEM and 5+ years experience (or Master's +3). DoD Secret clearance and U.S. citizenship required. Proficiency in C/C++, Linux; Docker/Kubernetes and MATLAB preferred.
C/C++, Linux, Docker, Kubernetes, MATLAB
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1mo
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Junior C# Software Engineer
Bethesda, Maryland, United States
$67k-$133k/yr HybridFull Time
CACI International
CACI InternationalNYSE: CACI: Provides information technology and engineering services for government agencies.
0+ YOEBachelor's degree in a related field, C# and Python experience, 0–3 years of experience, US citizenship and ability to obtain DoD Secret clearance, strong problem-solving and communication skills.
C#, Python
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1mo
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Junior C# Software Engineer
Bethesda, Maryland, United States
$67k-$133k/yr HybridFull Time
CACI
CACINYSE: CACI: Provides information technology and professional services to government clients.
0+ YOEBachelor's degree in CS or related field, C# and Python experience, 0–3 years experience, US citizen eligible for DoD Secret clearance, strong problem-solving and communication skills.
C#, Python
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1d
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Senior C++ Software Engineer
Columbia, Maryland, United States
OnsiteFull Time
HEICO
HEICONYSE: HEI: Manufactures specialty electronic components and niche aircraft parts.
Deep C and C++ fundamentals, multithreading, debugging on Linux, Git and CI/CD (GitLab, Docker, Make), automated testing with gtest, and U.S. citizenship with ability to obtain Top Secret clearance.
C, C++, Git, GitLab, Docker, Linux shell scripting, Make, CMake, Google Test (gtest), Python, JavaScript, React
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4h
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Senior C++ Software Engineer
Columbia, Maryland, United States
OnsiteFull Time
LPI Corporation
LPI Corporation: Manufactures precision components for aerospace and defense applications.
Deep C and C++ fundamentals, multithreading/concurrency, strong debugging on Linux, Git and CI/CD (GitLab,Docker,Make), automated testing with Google Test, U.S. citizenship and ability to obtain Top Secret clearance.
C, C++, Git, GitLab, Docker, Linux, Linux shell scripting, Make, CMake, Google Test (gtest), Python, JavaScript, React, GitHub Copilot, Cursor, Claude, GPT
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3w
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.NET C# Developer
Washington, District of Columbia, United States
$145k-$151k/yr OnsiteFull Time
Cayuse Holdings
Cayuse Holdings: Tribally-owned provider of IT and professional services.
3+ YOE3+ years C#/.NET experience, ASP.NET, Entity Framework, SQL Server; Bachelor's degree preferred or 8+ years experience; active Top Secret clearance; unit/integration testing and secure coding experience.
C#, .NET, ASP.NET, Entity Framework, SQL Server, REST, RPC, Git, GitLab, Microsoft Excel, Microsoft Word, Microsoft PowerPoint, Acrobat, Azure, AWS, Jira, Azure DevOps
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3w
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C# / .Net Developer
Washington, District of Columbia, United States
$125k-$155k/yr OnsiteFull Time
Synergy ECP
Synergy ECP: Provides cybersecurity and systems engineering for defense agencies.
8+ YOEBachelor's degree and 8+ years software engineering experience; 3–5 years with C#/.NET, ASP.NET, Entity Framework, and Microsoft SQL Server; experience with REST/RPC, unit/integration testing, secure coding; active TS/SCI clearance and U.S. citizenship required.
C#, .NET, ASP.NET, Entity Framework, Microsoft SQL Server, Git, GitLab, Docker, AWS, Azure, REST, RPC, CI/CD
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1mo
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C++ Application Developer
Fairfax, Virginia, United States
OnsiteFull Time
NASK
NASK: Provides mission-critical solutions to intelligence and defense clients.
5+ YOEActive TS/SCI clearance, Bachelor’s or higher in CS/CE/EE, 5+ years desktop app development, strong C++, Qt UI experience, Linux environment familiarity, Git proficiency.
Qt, GTK, WPF, Java/Swing, Linux, Git, AWS, Docker, Kubernetes, Grafana, Loki
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2mo
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C++ Software Developer
Arlington, Virginia, United States
OnsiteFull Time
ManTech
ManTech: Provides technology solutions for defense and intelligence agencies.
3+ YOE3+ years software development with modern C++, SQL experience, distributed source control (Git/Mercurial), Bachelor's (or Associate + experience), active Secret clearance required (US citizen), ability to produce technical documentation.
C++, Visual Studio, UML, SQL, SQLite, Git, Mercurial, Python, Windows, Linux
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3w
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C#/.NET Developer
Washington, District of Columbia, United States
$151k-$156k/yr OnsiteFull Time
E-INFOSOL
E-INFOSOL: Provides secure cloud and cybersecurity solutions for government agencies.
8+ YOEActive Top-Secret clearance, Bachelor’s in IT, minimum 8 years experience with 3–5 years using C#/.NET; experience with ASP.NET, Entity Framework, Microsoft SQL Server, REST/RPC, Git/GitLab, unit/integration testing, and secure coding practices.
C#, .NET, ASP.NET, Entity Framework, Microsoft SQL Server, REST, RPC, Git, GitLab, AWS, Azure, Docker, CI/CD
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3w
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GN&C Navigation Engineer III
Seattle or Brevard County or Huntsville or Denver or Los Angeles or Reston
$165k-$231k/yr OnsiteFull Time
Blue Origin: Develops reusable rockets and systems for human spaceflight.
5+ YOEM.S. in a STEM field with 5+ years in navigation systems; strong skills in Rust, C/C++, or C; experience with state estimation/Kalman filters and navigation sensors (IMUs, star trackers); U.S. eligibility required.
C, C++, Rust, Python, DO-178C, IMUs, star trackers, optical sensors, hardware-in-the-loop
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3w
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Cleared C# / .NET Developer
Washington, District of Columbia, United States
$91k-$185k/yr OnsiteFull Time
Accenture Federal Services
Accenture Federal ServicesNYSE: ACN: Provides technology and consulting services to U.S. federal agencies.
3+ YOEBachelor's degree with 3+ years developing software using C#/.NET, ASP.NET, Entity Framework, and SQL Server; unit testing, secure coding, Git/GitLab; active Top Secret clearance and US citizenship; onsite Washington, DC.
C#, ASP.NET, Entity Framework, SQL Server, REST, RPC, Git, GitLab, AWS, Azure, Docker, CI/CD
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3w
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C-UAS Project Engineer
Washington or Chantilly or West Virginia or United States
$120k-$165k/yr HybridFull Time
Amentum
AmentumNYSE: AMTM: Provides engineering, technology, and mission support to government agencies.
3+ YOEU.S. citizen able to obtain Public Trust, Bachelor’s in engineering + 3+ years experience, C-UAS systems expertise, API/SDK and sensor fusion experience, ability to integrate C-UAS systems and develop technical documentation.
API, Team Awareness Kit (TAK), Tactical Assault Kit, Dedrone City, Cloud Based Command and Control (CBC2), Athena, LATTICE
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1w
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Senior C++ Software Engineer (Defense Autonomy)
Washington or Arlington
$150k-$200k/yr OnsiteFull Time
Applied Intuition
Applied Intuition: Developing software and simulation infrastructure for autonomous vehicles.
5+ YOE5+ years C++ (C++20) experience, strong algorithms and multi-agent/optimization background, proficiency with Bazel, Docker, Linux, ability to obtain U.S. SECRET clearance, BS/MS or equivalent experience.
C++20, Bazel, Docker, RHEL, Ubuntu, Linux
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3mo
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C++ Engineer- FreeWheel- Onsite (Hybrid)- Chicago, IL, Denver, CO, Reston, VA or New York, NY
Chicago or New York or Reston or Denver
$110k-$188k/yr HybridFull Time
Comcast
ComcastNASDAQ: CMCSA: Provides global telecommunications, media content, and entertainment services.
2+ YOEBachelor’s degree in computer science or related field; 2+ years in C/C++; experience with distributed systems and software development lifecycle.
C++, C, Database design, Network programming, Distributed systems, Agile, SDLC
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1mo
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Senior C++/Python Software Engineer - Clearance Required
Hanover, Maryland, United States
$151k-$266k/yr OnsiteFull Time
Lockheed Martin
Lockheed MartinNYSE: LMT: Designs and manufactures global security and aerospace systems.
15+ YOETS/SCI with poly required, Bachelor's in CS or equiv, 15+ years software engineering experience, strong Python and C/C++ skills, scripting (Bash/awk/sed/PowerShell), RF signals familiarity, EM/STM32 experience preferred.
Python, C/C++, Bash, awk, sed, Microsoft PowerShell, STM32CubeMX, STM32CubeIDE, STM32CubeProgrammer, STM32CubeMonitor, Raspberry Pi4, Raspberry Pi5, FieldFox, Spectrum analyzer, multimeter
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3d
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Space Systems TT&C Engineering Lead
Chantilly, Virginia, United States
$113k-$257k/yr OnsiteFull Time
Booz Allen Hamilton
Booz Allen HamiltonNYSE: BAH: Consulting and technology services for government and commercial clients
Expertise in launch vehicle or satellite TT&C, mission design/operations, technical team leadership, and active TS/SCI clearance; bachelor’s in aeronautical engineering required.
Jira/Confluence, Python
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3w
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Software Engineer III (C++ Engineer)
Chantilly, Virginia, United States
OnsiteFull Time
Textron
TextronNYSE: TXT: Manufactures aircraft, defense systems, and industrial specialized vehicles.
5+ YOEBachelor's in CS/CE, 5+ years relevant experience, strong C++ and multi-threading skills, Linux/Windows experience, Azure DevOps/Jira/Git/Docker familiarity, eligible for U.S. Top Secret clearance.
C++, C#, Java, JavaScript, HTML, Python, Linux, Windows, Azure DevOps, Jira, Git, Docker, CI/CD
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3d
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Space Systems TT&C Engineering Lead
Chantilly or Colorado Springs or Aurora
$113k-$257k/yr OnsiteFull Time
Booz Allen Hamilton
Booz Allen HamiltonNYSE: BAH: Provides technology and management consulting services to diverse organizations.
Experience with launch vehicle or satellite TT&C, mission design and operations, CONOPS, ability to manage technical teams, active TS/SCI clearance (polygraph willingness), bachelor\u0002s in aeronautical engineering; software/cloud/Agile familiarity preferred.
Jira, Confluence, Python
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