Senior Software Defined Radio (SDR) Engineer

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. #J-18808-Ljbffr NCSL International