Senior Software Simulation Engineer

Hermeus•Los Angeles, CA

About The Position

Hermeus is a venture-backed defense aviation company focused on rapid iterative prototyping to build the fastest aircraft. They work with the Department of War to provide high-speed capabilities. The company is seeking a Senior Software Simulation Engineer to develop and deploy real-time simulation environments for aerospace flight control and avionics systems. This role involves using Model-Based Design (MBD) with MATLAB/Simulink and automated code generation for Hardware-in-the-Loop (HIL) and Software-in-the-Loop (SIL) testing. The engineer will translate dynamic system models into real-time code, bridging control system design and embedded software implementation. Collaboration with multidisciplinary teams, integration of models with real-time targets, and optimization of simulation performance are key aspects. The ideal candidate will have a strong understanding of aerospace systems, control theory, real-time simulation platforms, model-based code generation, HIL development, and test automation in safety-critical environments.

Requirements

Bachelor’s degree in Aerospace Engineering, Electrical Engineering, Computer Engineering, Computer Science, Mechanical Engineering, or related field.
5+ years of experience in simulation, controls, embedded software, or real-time test environments.
Hands-on experience with MATLAB, Simulink, and Model-Based Design.
Experience with code generation tools such as Simulink Coder or Embedded Coder.
Understanding of aircraft dynamics, control systems, avionics, or embedded aerospace systems.
Experience with SIL, HIL, or real-time simulation environments.
Proficiency in C/C++, Python, or similar programming languages.
Strong debugging skills across software, models, and hardware interfaces.
Ability to work across teams in a fast-paced engineering environment.

Nice To Haves

Experience with real-time platforms such as Speedgoat, dSPACE, NI VeriStand, or OPAL-RT.
Experience supporting flight controls, GNC, avionics, autonomy, or aircraft systems.
Familiarity with interfaces such as CAN, Ethernet, ARINC 429, MIL-STD-1553, RS-422, or serial.
Experience with automated testing, CI/CD, Git, or software configuration management.
Familiarity with safety-critical aerospace standards such as DO-178C, DO-331, or DO-254.
Experience integrating simulation environments with flight software or test hardware.
Background in aircraft, UAVs, spacecraft, defense systems, or other complex aerospace platforms.
Strong ownership mindset and ability to build practical tools that help teams test and iterate quickly.

Responsibilities

Develop and maintain real-time simulation environments for flight control, avionics, and aircraft systems.
Build and support SIL and HIL test environments for flight software verification.
Use MATLAB/Simulink and Model-Based Design workflows to create models and generate real-time code.
Integrate aircraft dynamics, controls, sensors, actuators, and avionics models into simulation environments.
Connect models with real-time targets, embedded software, and hardware interfaces.
Improve simulation performance, timing, fidelity, and reliability.
Create automated test scripts and tools to support repeatable validation.
Work closely with GNC, flight software, avionics, systems, and test teams to debug and validate system behavior.
Support documentation, requirements traceability, and verification activities for flight-critical systems.