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53 software simulation engineer jobs at 22 companies in Simi Valley, CA

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Simulation Software Engineer
Los Angeles, California, United States
OnsiteFull Time
Revel
Revel: Modern software platform for controlling complex hardware systems.
Bachelor's or Master's in CS/Software Engineering, strong C++ and/or Rust, knowledge of physics/applied math, modern engineering practices (testing, code reviews, CI/CD), strong problem-solving and communication.
C++, Rust, TypeScript, Python
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2mo
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Simulation Software Engineer
Goleta, California, United States
$110k-$180k/yr OnsiteFull Time
Toyon Research
Toyon Research: Develops advanced technology and analysis for national defense systems.
2+ YOEBS or higher in CS/engineering/physics/math; 2+ years experience; strong C++/Python; version control; testing; scripting; Monte Carlo/probability methods.
C++, Python, Git, GitLab, Bitbucket, Scripting
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3mo
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Senior Software Engineer I/II - Simulation Engineering
Littleton or Long Beach
$120k-$160k/yr OnsiteFull Time
Rocket Lab
Rocket LabNasdaq: RKLB: Operates launch vehicles and manufactures satellites for space missions.
5+ YOEBachelor's degree and 5+ years experience in large-scale simulation engineering or distributed computational modeling; proficiency in Python or C++; experience with Monte Carlo campaigns, big-data analysis, and HPC; U.S. citizenship required.
Python, C++, Docker Swarm, Kubernetes
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1mo
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Senior Satellite Simulation & Test Software Engineer - TeraWave
Seattle or Los Angeles or Denver
$182k-$277k/yr OnsiteFull Time
Blue Origin
Blue Origin: Develops reusable rockets and systems for human spaceflight.
10+ YOEBachelor's degree in CS/SE/Aerospace, 10+ years spacecraft or embedded simulation/software experience, strong C/C++ and Python skills, simulation architecture and verification experience, familiarity with flight interfaces and IPC, U.S. work eligibility required.
C, C++, Python, Google Test, Git, CI/CD, containerized environments, IPC, sockets, shared memory, message queues, publish-subscribe middleware, NASA's Trick, cFS, CCSDS, MISRA C/C++, Linux, QNX, VxWorks, RTEMS, TCP/IP, UDP, CAN, I2C, SPI, RS-422/485
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3mo
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Simulation Engineer
Los Angeles, California, United States
$145k-$185k/yr OnsiteFull Time
Apex
Apex: Mass-manufactures standardized satellite buses for commercial and government use.
3+ YOE3+ years in closed-loop simulation tools; BS in CS/CE/EE/Aerospace; proficient in C/C++, Python; Linux; Docker; CI/CD; experience with SITL/HITL; strong analytical skills.
C++, Rust, Python, Linux, Docker, CI/CD, Git
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3mo
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Lead Simulation Engineer
Hawthorne, California, United States
$142k-$235k/yr OnsiteFull Time
Venturi Astrolab
Venturi Astrolab: Designs and builds robotic rovers for Moon and Mars exploration.
10+ YOELead real-time and faster-than real-time simulations; 10+ years experience; 3+ years leading a team; integrate simulations with vehicle software; strong C++ and Python; model validation and sensor/actuator modeling.
C++, Python
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4w
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Senior Vehicle Simulation Engineer
Long Beach, California, United States
$148k-$204k/yr OnsiteFull Time
Relativity Space
Relativity Space: Designing and manufacturing 3D-printed rockets and launch vehicles.
2+ YOEUndergraduate or graduate degree in engineering/CS/physics, 2+ years relevant experience (rocketry or complex hardware preferred), strong proficiency in Python/Julia/MATLAB, simulation and software tooling experience, ability to lead multidisciplinary analysis.
Python, Julia, MATLAB, Docker, Continuous Integration/Continuous Deployment (CI/CD)
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2w
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Software Engineer - Simulation (Palmdale)
Palmdale, California, United States
$92k-$138k/yr OnsiteFull Time
Northrop Grumman
Northrop GrummanNYSE: NOC: Designs and manufactures advanced aerospace and defense systems.
0+ YOESTEM degree (BS/MS), experience with SDLC, C/C++/Python, familiarity with simulation environments, experience with listed DevOps tools, active U.S. Secret clearance and ability to obtain SAP.
C, C++, Python, Jira, Crucible, Bitbucket, Subversion, Bamboo, Jenkins, Sonarqube, Fortify, Coverity
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Software Engineer, Engineering Simulation & Automation (Vehicle Engineering)
Hawthorne, California, United States
$125k-$175k/yr OnsiteFull Time
SpaceX
SpaceX: Designs and launches advanced rockets and satellite internet constellations.
1+ YOE1+ years software development; 1+ years in a simulation domain; bachelor’s degree in engineering/CS/data science/math/physics or 4+ years in lieu of degree.
ANSA, Star-CCM+, OpenFOAM, Abaqus, OpenTD, CalculiX
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Simulation Engineer I, Arc Vehicle
Playa Vista, California, United States
$71k-$124k/yr OnsiteFull Time
Inversion Space
Inversion Space: Building autonomous re-entry vehicles for global space-to-Earth cargo delivery.
1+ YOEBachelor's in CS/CE/Aerospace/Mechanical or equivalent experience; 1+ years internship/research/professional experience in software or physics-based simulation; proficiency with C++ or Python on Linux; strong physics and numerical analysis; familiarity with Git.
C++, Python, Linux, Git, MATLAB/Simulink, ROS/ROS2, Docker, CI/CD, HPC, SIL, HIL
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2w
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Software Engineer - Simulation (Palmdale)
Palmdale, California, United States
$92k-$138k/yr OnsiteFull Time
Northrop Grumman
Northrop GrummanNYSE: NOC: Develops and manufactures advanced aerospace, defense, and space systems.
2+ YOESTEM bachelor's with 2 years (or STEM master's), SDLC experience, proficiency in C/C++/Python, experience with listed CI/SCM tools, active U.S. Secret clearance and ability to obtain SAP, 2+ years engineering experience.
C, C++, Python, Jira, Crucible, Bitbucket, Subversion, Bamboo, Jenkins, Sonarqube, Fortify, Coverity, AI/ML, Quantum computing, Cloud, Joint Simulation Environment (JSE), Distributed Interactive Simulation (DIS), High-Level Architecture (HLA), AFSIM, NGTS
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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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2d
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Senior Software Engineer
El Segundo, California, United States
$212k-$286k/yr OnsiteFull Time
Boeing
BoeingNYSE: BA: Designs and manufactures aircraft, defense systems, and space technology.
10+ YOERequires 10+ years modeling & simulation or systems engineering/software development experience, active U.S. Secret clearance, bachelor\u0002s degree or equivalent, proficiency in modern programming languages and Git/Linux.
C++, Java, JavaScript, Perl, Python, Visual Basic, Git, Linux, MATLAB/Simulink, Rust, AWS, Azure, CI/CD
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1mo
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Software Engineer Staff Combat Systems
Palmdale, California, United States
$114k-$201k/yr OnsiteFull Time
Lockheed Martin
Lockheed MartinNYSE: LMT: Designs and manufactures global security and aerospace systems.
Bachelor's in engineering/technical field, experience developing C++ software on Windows and Linux, familiarity with CMake, TCP/UDP and DDS, Agile/Jira experience, ability to integrate and test real-time simulation software; must be a U.S. citizen with active Secret clearance.
C++, Windows, Linux, CMake, TCP, UDP, DDS, Jira, VRSG, OMNI View, AFSIM, HOTAS, DIS, CIGI, Git, hardware-in-the-loop
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2d
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Senior Software Engineer
El Segundo, California, United States
$212k-$286k/yr OnsiteFull Time
Boeing
BoeingNYSE: BA: Designing and manufacturing commercial aircraft and defense systems.
10+ YOEActive U.S. Secret clearance, Bachelor's or equivalent,10+ years modeling & simulation or systems/software experience,5+ years modern programming (C++,Java,Python,etc.),Git/Linux experience.
C++, Java, JavaScript, Perl, Python, Visual Basic, Git, Linux, MATLAB, Simulink, Rust, AWS, Azure
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3mo
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Modeling & Simulation Software Engineering Intern - Fall 2026
Los Angeles, California, United States
$25-$33/hr OnsiteInternship
Hermeus
Hermeus: Develops high-speed and hypersonic aircraft for defense and transportation.
0+ YOEPursuing a degree in Computer Science, Aerospace Engineering, Electrical Engineering, Applied Mathematics, or related field; proficient in Julia or Python/MATLAB/C++; knowledge of 6DOF dynamics; experience with data validation and modeling; GPA 3.0+; strong communication and teamwork.
Julia, Python, MATLAB, C++
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Software Engineer, Locomotion
El Segundo, California, United States
OnsiteFull Time
GRAM
GRAM: Developing self-replicating robotic systems for space infrastructure.
Robot locomotion experience, learned policy transfer from simulation to hardware, Python and legged-robotics stack proficiency.
Python, MuJoCo, MuJoCo MPC, Drake, Pinocchio, OCS2, Crocoddyl, C++, legged_gym
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1w
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Senior Software Engineer - OMS
Fort Worth or Palmdale
$120k-$160k/yr OnsiteFull Time
Lynx Software Technologies
Lynx Software Technologies: Provides secure, safety-certified software for aerospace and defense.
5+ YOEBachelor's in STEM,5+ years C++ development,OMS architecture,Linux C++ mission software,DDS/pub-sub,service-oriented design,interface and ICD work,simulation and integration testing,active Secret clearance required.
C++, Linux, Open Mission Systems (OMS), DDS, Confluence, JIRA, Bitbucket, Java, FACE, Modular Open Systems Approach (MOSA)
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3w
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Senior Ground Software Engineer (Maritime)
Los Angeles, California, United States
$130k-$180k/yr OnsiteFull Time
Odin Dynamics
Odin Dynamics: Developing autonomous underwater vehicles for defense and maritime missions.
U.S. citizenship and security-clearance eligibility; deep full‑stack frontend/backend experience; telemetry and time‑series data systems experience; testing (unit, integration, simulation/SIL/HITL); field test and sea‑trial support; mentoring and hands‑on production development.
CI/CD, AI-assisted development tools, SIL, HITL, static analysis, profiling
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2w
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RF Engineer
El Segundo, California, United States
$76k-$144k/yr OnsiteFull Time
RTX
RTXNYSE: RTX: RTX provides advanced aerospace and defense systems and services.
2+ YOEDegree in electrical engineering or STEM, 2+ years microwave RF design experience, experience with RF design, simulation, test and production support, ability to obtain DoD Secret clearance, proficiency with listed RF software and lab equipment.
Keysight ADS, National Instruments AWR Microwave Office, Sonnet EM, Ansys HFSS, AutoCAD, Keysight Genesys, SystemVue, Matlab, Mentor DxDesigner, eXpedition
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