About this opportunity
Knightwerx lists this Senior Embedded Software Engineer (Small UAV Flight Controls) opportunity in scottsdale, Arizona. Review the employer’s description below for duties, qualifications and application requirements.
Job description
Role Overview
Read the overview of this opportunity to understand what skills, including and relevant soft skills and software package proficiencies, are required.
We are seeking a Senior Embedded Software Engineer for Small UAV Flight Controls to
architect, develop, and test deterministic, safety-critical flight control firmware for our
small unmanned aerial vehicles (Group 1 and Group 2 tactical aircraft, fixed-wing, or hybrid
VTOLs). In this role, you will own the software layer that sits directly between complex
guidance algorithms and physical aircraft actuation, ensuring maximum stability, agility,
and responsiveness on lightweight, space-constrained hardware.
You will bridge the gap between control theory and low-SWaP (Size, Weight, and Power)
bare-metal or RTOS execution. You will write robust, high-integrity code that operates
under strict real-time constraints, optimizing every clock cycle to ensure ultra-low latency
from sensor sample to actuator command.
Key Responsibilities
Flight Software & Driver Development
• Control Loop Execution: Design, optimize, and implement high-rate stabilization
loops, attitude control algorithms, and actuator mixing logic in C and C++.
• Low-Level Drivers: Develop and maintain bare-metal peripheral drivers for highly
integrated microcontrollers to interface with IMUs, magnetometers, barometers,
airspeed sensors, and GPS modules.
• RTOS Optimization: Configure and profile Real-Time Operating Systems (e.g.,
FreeRTOS, ChibiOS, Zephyr) for highly predictable task scheduling, deterministic
execution, and minimal jitter.
System Integration & Deterministic Communication
• Bus Architecture: Manage and optimize communication protocols over lightweight,
low-pin-count buses including CAN bus (UAVCAN/Cyphal), SPI, I2C, and UART to
interface with Electronic Speed Controllers (ESCs) and servos.
• Fault Tolerance: Implement robust fault detection, isolation, and recovery (FDIR)
mechanisms to immediately handle small UAV anomalies, such as sensor
dropouts, frame vibrations, or battery voltage drops.
• HIL Testing: Build and utilize Hardware-in-the-Loop (HIL) simulation setups to
safely validate flight software performance and corner-case failure modes on the
bench.
SWaP Optimization & Architecture
• Resource Management: Target, profile, and optimize memory footprint
(SRAM/Flash) and CPU usage on high-performance microcontrollers (e.g., ARM
Cortex-M4/M7/H7).
• Open-Source Hardening: (If applicable) Maintain, customize, and secure opensource small UAV ecosystems like PX4, ArduPilot, or Betaflight for custom
proprietary hardware configurations.
Required Skills & Qualifications
• Education: Bachelor’s or Master’s degree in Computer Engineering, Electrical
Engineering, Robotics, or a related technical discipline.
• Firmware Expertise: Deep professional experience developing production-grade
embedded C and C++ software for real-time systems.
• Microcontroller Fluency: Extensive experience with ARM Cortex-M or similar
architectures, registers, timers, DMA, and interrupt handling.
• Lab Tool Proficiency: Hands-on experience using oscilloscopes, logic analyzers,
multi-meters, and JTAG/SWD debuggers to isolate hardware vs. software issues.
• State Estimation Basics: Practical understanding of digital filtering (e.g., notch
filters, low-pass filters) used to mitigate high-frequency frame vibrations common in
small UAVs.
Preferred Qualifications
• Direct experience contributing to or deploying customized PX4 Autopilot or
ArduPilot stacks onto custom small UAV airframes.
• Background in mathematical modeling, MATLAB/Simulink code generation, or
working alongside GNC engineers to port control laws into C.
• Experience implementing lightweight safety protocols or functional safety
frameworks scaled down for consumer, commercial, or defense-grade small UAV
systems
About Knightwerx
Knightwerx develops American-made, AI-powered unmanned aerial systems and remote sensing technologies for commercial and government customers. xhqgsiq Our platforms support autonomous operations, human-machine teaming, and mission-critical applications where reliability, performance, and speed matter.
Worksite address
scottsdale, AZ, 85261, US
Who can apply
Review the original listing for work authorization, qualifications and employer requirements.