Principal Software Engineer at CACI International Inc in Melbourne, FL

Job Title: Principal Software Engineer

Job Category: Engineering

Time Type: Full time

Minimum Clearance Required to Start: None

Employee Type: Regular

Percentage of Travel Required: Up to 10%

Type of Travel: Continental US

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The RF Design Software Engineer will play a critical role in the design, development, and testing of Azure’s complex PCBs and PCBAs. This individual will work with the HW design engineering team in the design development and testing of complex RF and mixed signal circuit boards from prototype to full rate production.

RF Design Software Engineer – DSP, Xilinx & Embedded Linux

Key Responsibilities:

• Design, implement, and optimize DSP algorithms for RF applications such as modulation/demodulation, filtering, FFTs, channelization, and digital down/up conversion.
• Develop and maintain embedded Linux applications using PetaLinux on Xilinx SoC platforms.
• Interface embedded software with FPGA logic using AXI, DMA, interrupts, EMIO, and memory-mapped peripherals.
• Communicate with and control programmable RF devices, including:
  • RF attenuators
  • PLLs and frequency synthesizers
  • Programmable gain amplifiers
  • RF upconverters and downconverters
  • High-speed RF ADC and DAC devices
  • Interface and control of ADC/DAC JESD information for signal processing.
• Implement and debug SPI, I²C, GPIO, and register-level control interfaces.
• Support JESD204 (A/B/C) link bring-up in coordination with FPGA and hardware teams.
• Perform system bring-up, debugging, calibration, and performance optimization.
• Collaborate with RF, FPGA, hardware, and systems engineers on architecture and requirements.
• Validate designs using RF lab equipment (spectrum analyzers, signal generators, oscilloscopes, VNAs)
• Document software, algorithms, interfaces, and test procedures
• Write low level firmware for board level controls via FPGA and/or microcontroller in VHDL and/or C/C++.

Required Experience:

• Ability to obtain security clearance.
• 4-year degree in college in an engineering discipline.
• 10+ years of electronics design experience.
• Experience with RF transceivers (e.g., Analog Devices AD936x, AD908x, or similar)
• FPGA design experience using Vivado and/or Vitis
• Understanding of Digital Electronics and able to follow Schematic diagrams.
• Familiarity with AXI interconnects, DMA engines, and high-throughput data paths
• Experience with spidev, IIO frameworks, or custom Linux drivers
• Knowledge of GNU toolchains, cross-compilation, and Yocto-based workflows
• Understanding of wireless or SDR systems (LTE, 5G, Wi-Fi, radar, or custom waveforms)

Optional Experience:

• Experience working with Cadence tools including schematic design with OrCad.

• Experience writing Interface Control Documentation or high-level design documents.

• Experience writing automated test code and control of external test equipment.

• Familiarity with PIC microcontrollers.

• Knowledge of STM32 ARM microprocessors and software development.

• Able to use test equipment such as an oscilloscope and/or logic analyzer in the debug of device control interfaces.

• GUI design experience in C# or C,C++ for PC control and test application development.

What You Can Expect:

A culture of integrity.

At CACI, we place character and innovation at the center of everything we do. As a valued team member, you’ll be part of a high-performing group dedicated to our customer’s missions and driven by a higher purpose – to ensure the safety of our nation.

An environment of trust.

CACI values the unique contributions that every employee brings to our company and our customers - every day. You’ll have the autonomy to take the time you need through a unique flexible time off benefit and have access to robust learning resources to make your ambitions a reality.

A focus on continuous growth.

Together, we will advance our nation's most critical missions, build on our lengthy track record of business success, and find opportunities to break new ground — in your career and in our legacy.

Pay Range:

There are a host of factors that can influence final salary including, but not limited to, geographic location, Federal Government contract labor categories and contract wage rates, relevant prior work experience, specific skills and competencies, education, and certifications. Our employees value the flexibility at CACI that allows them to balance quality work and their personal lives. We offer competitive compensation, benefits and learning and development opportunities. Our broad and competitive mix of benefits options is designed to support and protect employees and their families. At CACI, you will receive comprehensive benefits such as; healthcare, wellness, financial, retirement, family support, continuing education, and time off benefits.

The proposed salary range for this position is: $99,800 - $219,600

CACI is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, pregnancy, sexual orientation, age, national origin, disability, status as a protected veteran, or any other protected characteristic.