Senior Software Defined Radio (SDR) Engineer

Leidos; United States; On-site; USD 120,000 - 165,000; Full time

Job summary

Leidos is seeking a Software Defined Radio Engineer to design, develop, and integrate high-performance SDR solutions in Arlington, VA. The role emphasizes real-time RF signal processing, low-latency streaming, and hardware/software co-design with Ettus USRP platforms.

The candidate will build production-grade SDR systems, optimize them for demanding environments, and contribute to RF front ends, synchronization systems, and lab/field testing. Requires active clearance or ability to obtain one.

Qualifications

• Bachelor's degree in Electrical, Computer Engineering or related field.
• 8+ years of hands-on experience with Ettus USRP platforms (X310/X410, N320/N321, X440, B-Series).
• Strong proficiency in modern C++, Python, Linux systems programming and performance optimization.
• Experience with UHD API, real-time streaming, high-rate packet processing, socket programming, and low-latency software architectures.
• Active Secret security clearance or ability to obtain and maintain one.

Responsibilities

• Design, develop, and deploy advanced SDR systems using Ettus USRP hardware.
• Develop high-performance SDR applications using C++ and UHD.
• Implement and optimize real-time DSP pipelines, waveform generation, modulation/demodulation chains, and RF streaming architectures.
• Interface with FPGA-based SDR architectures and high-speed Ethernet transport.
• Develop software for low-latency, real-time RF applications and perform system integration/testing.

Skills

C++

Python

Linux

Multithreaded software

Real-time DSP

Education

Bachelor's degree in Electrical/Computer Engineering or related field

Tools

UHD API

Ettus USRP platforms (X310/X410, N320/N321, X440, B-Series)

RFNoC

Job description

Description

Today, Electronic Warfare (EW) is a growing enterprise – protecting the warfighter and our national security against ever‑adapting threats. Our division currently has an exciting opportunity for a Software Defined Radio (SDR) Engineer to perform design, development, and hardware/software integration in Arlington, VA for the Electronic Warfare Division.

Our division primarily focuses on research & development and advanced prototyping, transforming state‑of‑the‑art signal processing algorithms into real‑time software systems deployed on advanced RF platforms.

The successful candidate will be an individual contributor responsible for designing, developing, and integrating high‑performance SDR solutions using Ettus Research USRP platforms. This role requires expertise in real‑time RF signal processing, low‑latency streaming architectures, and software development close to the hardware layer. The ideal candidate is comfortable building production‑grade SDR systems from the ground up and optimizing them for demanding operational environments.

Primary Responsibilities

• Design, develop, and deploy advanced SDR systems using Ettus Research USRP hardware
• Develop high‑performance SDR applications using:
  • C++
  • UHD (USRP Hardware Driver)
• Implement and optimize:
  • Real‑time DSP pipelines
  • Custom waveform generation
  • Modulation/demodulation chains
  • RF streaming architectures
  • High‑throughput signal processing systems
• Interface directly with:
  • FPGA‑based SDR architectures
  • High‑speed Ethernet transport layers
  • RF front ends and synchronization systems
• Develop software for low‑latency and real‑time RF applications
• Perform RF system integration, testing, calibration, and troubleshooting
• Analyze and optimize:
  • Spectral performance
  • Timing synchronization
  • Throughput bottlenecks
  • RF impairments
• Integrate SDR platforms into larger communications, sensing, or EW architectures
• Produce technical documentation, interface definitions, and software architecture artifacts
• Support lab and field testing activities, travel up to 15%

Basic Qualifications

• Bachelor's degree in:
  • Electrical Engineering
  • Computer Engineering
  • Computer Science
  • Related technical discipline
• Must have 8+ years of experience including strong hands‑on experience with:
  • Ettus Research USRP platforms (X310/X410, N320/N321, X440, B‑Series platforms)
• Strong proficiency in:
  • Modern C++
  • Python
  • Linux systems programming, including Linux performance optimization
  • Multithreaded and concurrent software architectures
• Experience deploying systems with Red Hat Linux
• Experience developing with:
  • UHD API
  • Real‑time streaming systems
  • High‑rate packet processing
  • Socket programming
  • Low‑latency software architectures
  • Ettus RF Network On Chip (RFNoC) architecture
• Strong understanding of:
  • RF fundamentals
  • Wireless communications systems
  • IQ signal processing
  • Digital modulation techniques
  • Wideband RF architectures
  • Spectrum analysis
• Experience implementing:
  • OFDM
  • QPSK/QAM
  • Channel estimation
  • Synchronization algorithms
  • FFT/channelization pipelines
  • Adaptive filtering
  • Signal detection and classification
  • Time/frequency synchronization
• Position requires an active Secret security clearance or the ability to obtain and maintain one

Preferred Qualifications

• Experience with:
  • Electronic Warfare (EW)
  • SIGINT/ELINT systems
  • Tactical communications
  • Spectrum operations
  • Radar or RF sensing systems
• Familiarity with:
  • Xilinx FPGA architectures
  • Vivado
  • Verilog/VHDL
  • Hardware acceleration pipelines
• Experience with:
  • 10/40/100 GigE transport
  • GPSDO/PPS synchronization
  • Distributed SDR architectures
  • Real‑time operating systems
• Familiarity with:
  • MIMO systems
  • Beamforming
  • SATCOM architectures
• Active Top Secret clearance preferred

Desired Traits

• Strong systems engineering mindset
• Ability to troubleshoot complex RF/software interactions
• Comfortable working directly with hardware in lab and field environments
• Capable of building production‑grade SDR software from the ground up
• Strong debugging, optimization, and performance tuning skills
• Self‑starter capable of operating in fast‑paced R&D environments

Commitment to Non-Discrimination

All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.