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54 software simulation engineer jobs at 27 companies in Frederick, MD

2mo
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Senior Software Simulation Engineer
Chantilly, Virginia, United States
OnsiteFull Time
By Light Professional IT Services
By Light Professional IT Services: Provides IT systems engineering and cybersecurity solutions for federal agencies.
5+ YOEBS in Engineering or Computer Science; 5+ years software engineering experience; proficient in C, C++, FORTRAN, Ada; Visual Studio; GCC; Makefiles; Windows/UNIX/Linux; object-oriented design; knowledge of flight simulation and real-time programming; ability to obtain Secret DOD clearance.
C, C++, FORTRAN, Ada, Visual Studio, GCC, Makefiles, Windows, Unix/Linux
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3mo
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Simulation Software Engineer
Laurel, Maryland, United States
$85k-$195k/yr OnsiteFull Time
Johns Hopkins University Applied Physics Laboratory
Johns Hopkins University Applied Physics Laboratory: Conducts research and engineering for national security and space.
0+ YOEBS in CS/CSE/EE/Physics/Applied Mathematics; experience in C++ and scientific computing; Python/ Matlab; team software practices; security clearance eligibility
C++, Python, Matlab/Simulink, TensorFlow, PyTorch, CUDA, Linux, Windows, CMake, Visual Studio
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1mo
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Visualization & Simulation Software Engineer
Chantilly, Virginia, United States
OnsiteFull Time
FTS International
FTS International: Providing engineering and mission support to the US Intelligence Community.
1+ YOEUS citizen able to obtain TS/SCI with polygraph; BS in STEM (engineering discipline); 1+ years relevant experience; basic JavaScript and frontend, familiarity with Python, 3D math, and client-server exposure.
Three.js, Python, JavaScript, Git
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1w
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Software Engineer, Agentic Modeling & Simulation
Washington, District of Columbia, United States
$191k-$292k/yr OnsiteFull Time
Anduril Industries
Anduril Industries: Defense technology building autonomous military hardware and software.
Production backend engineering experience, AI/ML and LLM-powered software knowledge, proficiency in Python or Go, technical degree, ability to work with operators and obtain Top Secret clearance.
Lattice OS, LLM, Python, Go, gRPC, protobuf, Kubernetes, AFSIM, STORM
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2w
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Software Engineer - Weapon Launchers & Simulation
Manassas, Virginia, United States
$91k-$101k/yr OnsiteFull Time
General Dynamics Mission Systems
General Dynamics Mission SystemsNYSE: GD: Designs and manufactures defense and mission-critical technology solutions.
2+ YOEBachelor's in Software Engineering or related STEM plus 2 years experience (or Master's plus 6 months); DoD Secret clearance obtainable; US citizenship; experience with Linux, Bash, Java, C/C++, React, TypeScript, and networking preferred.
Linux, Bash, Networking Switches, Java, C, C++, React, Typescript
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2w
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Director – Modeling & Simulation Software
El Segundo or Chantilly
$168k-$252k/yr OnsiteFull Time
The Aerospace Corporation
The Aerospace Corporation: Provides technical expertise and research for national space programs.
10+ YOEBachelor's in STEM, 10+ years engineering/scientific experience, track record of technical achievement, experience with C++ or Python, leadership and team-building experience, ability to obtain Top Secret/SCI clearance, occasional domestic travel (<20%).
C++, Python, Java, Go, Rust
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2w
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Senior Software Engineer, World Modeling & Simulation
Washington, District of Columbia, United States
OnsiteFull Time
Applied Intuition
Applied Intuition: Developing software and simulation infrastructure for autonomous vehicles.
7+ YOE7+ years software engineering experience building world/scene representations; expert C++20, computational geometry, spatial indexing, low-latency design; Python and shell scripting; U.S. citizenship and ability to obtain security clearance.
C++20, Python, shell scripting, Cursor, Claude Code, GitHub Copilot, Linux, Docker, Nix, Bazel
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1mo
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Software Engineer
Columbia, Maryland, United States
$93k-$140k/yr OnsiteFull Time
TCOM
TCOM: Designs and manufactures persistent surveillance aerostat and ISR systems.
5+ YOEBachelor's in Engineering required; minimum 5 years engineering experience (advanced degree may substitute); experience with simulation tools, modeling, testing, documentation, and design reviews.
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3w
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Junior Software Engineer (Modeling & Simulation) - TS/SCI
Chantilly, Virginia, United States
OnsiteFull Time
TENICA
TENICA: Provides national security and defense services to government agencies.
Active TS/SCI clearance with polygraph required; proficiency in an OOP language (Python, Java, or C++), Git, and databases; full‑stack development and rapid prototyping experience; strong problem‑solving and collaboration skills.
Python, Java, C++, Git, Docker, Kubernetes, NoSQL
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Principal Software Engineer - Advanced Simulation & Training Systems (Onsite)
Sterling, Virginia, United States
$118k-$225k/yr OnsiteFull Time
RTX
RTXNYSE: RTX: RTX provides advanced aerospace and defense systems and services.
5+ YOEActive transferable U.S. government security clearance (Secret), U.S. citizenship, STEM degree with 8+ years (or advanced degree with 5+ years), experience with C++, agile development, multi-threaded debugging, and customer travel.
C++, ARINC 429, ARINC 610, MIL-STD-1553, Windows, Linux, Visual Studio, DevSecOps, STL, Python, Perl, GIT, SVN, ClearCase, JIRA, Confluence, Crucible, GitLab CI/CD, Electronic Medical Records (EMR)
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2w
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Modeling and Simulations Software Developer
Huntsville or Rockville or Maryland or California
$72k-$123k/yr OnsiteFull Time
BAE Systems
BAE SystemsLondon Stock Exchange: BA: Provides advanced defense, aerospace, and security technology solutions.
4+ YOEUS citizen with Secret clearance, Bachelor's in CS/CE or related plus 4+ years experience, modeling & simulations experience, C++ development, software engineering and testing experience.
C++
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1mo
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Backend Software Engineer - Simulations
Arlington or New York City or Seattle or Arlington
OnsiteFull Time
Rune Technologies
Rune Technologies: Develops AI-powered logistics and sustainment software for military operations.
4+ YOE4+ years software engineering; production-grade software; Python/C++/Go; math/physics background; strong ownership.
Python, C++, Go, AWS, Kubernetes, Linux
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2d
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Principal / Sr. Principal AI Software Engineer
Dulles or Colorado Springs or El Segundo
$138k-$258k/yr OnsiteFull Time
Northrop Grumman
Northrop GrummanNYSE: NOC: Develops and manufactures advanced aerospace, defense, and space systems.
5+ YOEU.S. citizen with active DoD Top-Secret clearance (ability to obtain SCI/SAP), 5+ years AI engineering experience (level dependent), expertise in ML/RL/SL, strong software engineering and simulation experience.
Python, JAX, PyTorch, C++, CUDA, MATLAB/Simulink, Windows, Linux
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3w
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Staff Software Engineer - NOS
Washington, District of Columbia, United States
$150k-$196k/yr OnsiteFull Time
The Nuclear Company
The Nuclear Company: Deploys standardized nuclear reactors for utility-scale energy generation.
8+ YOE8+ years building and shipping production software; strong architecture and design judgment; experience with cloud (AWS) and CI/CD; experience across multiple surfaces; mentoring and cross-team leadership; BS/MS in CS/SE or equivalent.
NOS, AWS, CI/CD, iOS, Android, React Native, Flutter, Unity, Unreal, IoT, OT, XR, VR, computer vision, biometrics, digital twin, simulation
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1mo
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SATCOM Software Engineer, Senior Advisor
Chantilly, Virginia, United States
$146k-$234k/yr OnsiteFull Time
Peraton
Peraton: National security and mission-critical government technology services provider.
7+ YOETS/SCI with poly required. 7+ years (PhD) / 10+ years (MS) / 12+ years (BS) experience. Experience with SATCOM and weapons systems, TT&C, telemetry, modeling & simulation, data analysis, and SATCOM control/monitoring software; strong briefings and stakeholder engagement skills.
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2mo
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Senior Software Engineer, Autonomy Behaviors (R4587)
Boston or Washington
$160k-$240k/yr OnsiteFull Time, Temporary
Shield AI
Shield AI: Develops autonomous flight software and unmanned aircraft for defense.
5+ YOEDevelop autonomy software for unmanned platforms; strong C++, 5+ years in related areas; eligible for US Secret clearance; travel up to 20%.
C++, ROS, OMPL, Simulation tools
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2w
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Sr Principal Engineer Embedded Software
Sterling, Virginia, United States
$142k-$213k/yr OnsiteFull Time
Northrop Grumman
Northrop GrummanNYSE: NOC: Designs and manufactures advanced aerospace and defense systems.
4+ YOEUS citizen able to obtain/maintain Top Secret/SCI clearance; advanced degree in EE/CE or related STEM with 4–8+ years embedded software experience; proficiency in C/C++, Python, Windows/Linux scripting, and revision control; hardware-in-the-loop simulation experience.
C/C++, Python, Windows, Linux, Subversion, Git, Jenkins, Jira, Bitbucket, National Instruments, SpaceWire, MIL-STD-1553, RS-422, UART
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1mo
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SATCOM Software Engineer, Senior Advisor
Chantilly, Virginia, United States
$146k-$234k/yr OnsiteFull Time
Peraton
Peraton: Provides advanced technology and mission support for government agencies.
7+ YOERequires active TS/SCI with polygraph, 7–12+ years of experience depending on degree (7 years with Ph.D., 10 with MS, 12 with BS), experience with SATCOM/weapon systems, TT&C, modeling & simulation, and data/enterprise systems.
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2w
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Lead Modeling and Simulations Software Developer
Huntsville or Rockville or California
OnsiteFull Time
BAE Systems
BAE SystemsLondon Stock Exchange: BA.: Produces advanced defense, aerospace, and information security systems.
10+ YOE10+ MgmtUS citizen with Secret clearance, 10+ years experience with Javascript, Typescript, React, Java/Spring, management responsibility, bachelor's degree, and modeling & simulations experience.
Javascript, Typescript, React, Java, Spring Framework, Docker, Kubernetes, Rabbit MQ, TomCat Admin
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Senior Robotics Engineer
Sterling, Virginia, United States
OnsiteFull Time
Molg
Molg: Automated robotic microfactories for circular electronics manufacturing.
5+ YOE5+ years developing automated solutions with 6 DOF robots; proficiency in Python3 or C++ and ROS/ROS2; strong robotics fundamentals, motion planning, simulation, and experience validating software on physical robots.
Python3, C++, ROS, ROS2, unix, linux, sh, bash, zsh, git, CI/CD, ABB, FANUC, KUKA, CNC, 3D printers
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