Senior Embedded Software Engineer – RFIO / RF Systems Integration

Quest Defense Systems & Solutions, Inc.; Phoenix (AZ); On-site; USD 127,000 - 167,000; Full time

Benefits offered by this job

401(k) with employer match

Medical/dental/life and disability覆盖

Professional development support

Flexible, friendly workplace

Job summary

Quest Defense Systems and Solutions in Phoenix, AZ seeks an Embedded Software Engineer to develop and integrate software that controls RF transmit/receive systems. This hands-on role combines C/C++, Python, RF hardware, FPGA/firmware, and laboratory testing to characterize system performance, calibration, and troubleshooting. Location: Phoenix, Arizona.

On-site preferred, 3+ days/week; Citizenship: U.S. Person.

Qualifications

• 5-15 years of embedded software and hardware/software integration experience.
• Strong C and C++ development skills.
• Experience interfacing embedded or FPGA software with RF or mixed-signal hardware.
• Understanding of RF transmit/receive chains, calibration, and temperature compensation.
• Ability to configure hardware via low-level interfaces and interpret datasheets.
• Strong Python skills for test automation and data analysis.
• Experience debugging across software, FPGA/firmware, and hardware.
• Hands-on lab work with RF/test equipment and measurement.
• Familiarity with DO-178B/C or comparable requirements-based development.

Responsibilities

• Develop and maintain RFIO software interfacing embedded software/FPGA with RF hardware.
• Develop C/C++ software to configure, control, monitor, and characterize RF devices.
• Implement multi-channel transmitter control including beamforming and power leveling.
• Develop receiver calibration techniques for gain, phase, and temperature compensation.
• Integrate RF hardware with FPGA/firmware, embedded software, and system components.
• Interpret datasheets and develop register/configuration interfaces.
• Develop Python tests and automation for lab equipment and RF testing.
• Laboratory integration, characterization, troubleshooting, and debugging.
• Diagnose cross-domain issues among software, FPGA/firmware, RF, and hardware.
• Collaborate across RF, FPGA, hardware, systems, and software teams.
• Follow disciplined software processes for requirements, verification, and configuration management.

Skills

C/C++ development

Python

Embedded software

FPGA/firmware

RF systems knowledge

Troubleshooting

Tools

Oscilloscopes

Spectrum analyzers

Network analyzers

RF test equipment

SPI

I2C

UART

GPIO

Job description

We're looking for humble geniuses who believe engineering can turn the impossible into reality-and who are driven to design, build, and test solutions that matter for some of the world's most trusted companies. If you want to do meaningful work with a diverse team that believes in shared wins, continuous learning, and engineering a brighter future, this is the place for you.

We are seeking an experienced Embedded Software Engineer to develop and integrate software that controls, calibrates, and interfaces with RF transmit/receive systems. This hands-on role combines C/C++, Python, RF hardware, FPGA/firmware, and laboratory testing to characterize system performance, develop calibration and compensation techniques, and troubleshoot complex hardware/software issues.

Location: Phoenix, Arizona. On-site preferred, 3+ days/week

Citizenship: U.S. Person

Key Responsibilities

• Develop and maintain RFIO software interfacing embedded software/FPGA with RF subsystem hardware.
• Develop C/C++ software to configure, control, monitor, and characterize RF and mixed-signal devices.
• Implement multi-channel transmitter control, including phase alignment, beamforming, power/gain leveling, and programmable RF components.
• Develop receiver calibration and compensation techniques for gain, phase, sensitivity, temperature, and other RF variations.
• Integrate RF hardware with FPGA/firmware, embedded software, and system-level components.
• Interpret device datasheets and develop low-level register/configuration interfaces.
• Develop Python test and automation for laboratory equipment, RF testing, data collection, and analysis.
• Perform hands-on laboratory integration, characterization, measurement, troubleshooting, and debugging.
• Diagnose cross-domain issues involving software, FPGA/firmware, RF, and hardware.
• Work across RF, FPGA, hardware, systems, and software teams to resolve technical issues.
• Follow disciplined software processes for requirements, traceability, verification, validation, configuration management, and documentation.

Required Qualifications

• 5-15 years of relevant engineering experience in embedded software and hardware/software integration.
• Strong C and C++ development skills.
• Experience developing embedded or FPGA-facing software interfacing directly with RF or mixed-signal hardware.
• Practical understanding of RF transmit/receive signal chains, including phase, gain, synchronization, power leveling, sensitivity, calibration, and temperature compensation.
• Experience configuring hardware through low-level interfaces and device registers and interpreting component datasheets.
• Strong Python skills for test automation, instrumentation, data collection, and engineering analysis.
• Experience debugging issues across software, FPGA/firmware, and hardware.
• Hands-on experience with oscilloscopes, spectrum analyzers, network analyzers, and RF/electronic test equipment.
• Strong mathematical and analytical skills related to calibration, signal behavior, and system characterization.
• Ability to independently troubleshoot and drive root-cause resolution in a laboratory environment.
• Experience with requirements, traceability, verification, and validation processes.
• Experience with multi-channel RF systems, phased arrays, beamforming, radar, communications, electronic warfare, or similar RF-intensive systems.
• Familiarity with DO-178B/C or comparable requirements-based software development and verification.
• Must meet U.S. Person requirements.

Preferred Qualifications

• Experience developing multi-channel RF calibration algorithms.
• Experience characterizing RF performance across temperature or other environmental conditions.
• Experience automating RF laboratory equipment using Python.
• Experience with SPI, I C, UART, GPIO, or similar device-control interfaces.
• Familiarity with FPGA-based architectures and software-to-FPGA interfaces.
• Aerospace, defense, or other high-reliability embedded product experience.
• Experience supporting formal integration, verification, qualification, or certification activities.

The QDSS Advantage

At Quest Defense Systems and Solutions , we don't just build technology - we engineer the future. From next-generation aerospace solutions to cutting-edge defense systems, we tackle the toughest, mission-critical challenges that keep people safe and push the boundaries of innovation. This is where problem-solvers, innovators, and visionary thinkers come together to shape the future. With over 25 years of aerospace and defense engineering expertise, our commitment to delivering high-quality, transformative solutions sets us apart - not just as an industry leader, but as a driving force for impactful change. Together, we're not just leading the industry - we're revolutionizing it.

What You'll Find Here

• Work That Matters – Next-generation, safety- and mission-critical projects where your contributions have real-world impact.
• Growth That's Supported – Competitive compensation, employer-matched 401(k), certification assistance, and clear opportunities for advancement.
• A Culture That Works – A flexible, collaborative, and people-first environment where teamwork, innovation, and balance are valued.

Benefits Include

• Competitive pay, comprehensive medical/dental/life and disability coverage, 401(k) with employer match, professional development support, and a flexible, friendly workplace.

Full compensation package is based on candidate experience and certifications

Pay Ranges

$127,000-$167,000 USD

Quest Defense provides equal employment opportunities to all employees and applicants for employment and prohibits discrimination and harassment of any type without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state or local laws.

This policy applies to all terms and conditions of employment, including recruiting, hiring, placement, promotion, termination, layoff, recall, transfer, leaves of absence, compensation and training.The physical demands described here are representative of those that must be met by an employee to successfully perform the essential functions of this job. Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions.