Real-Time SDR Software Engineer: DSP & Localization

Anashield; København; On-site; DKK 850,000 - 1,150,000; Full time

Job summary

Anashield in Denmark is seeking a software engineer focused on the signal-processing layer of Software Defined Radio. You will turn raw I/Q data from SDR front-ends into reliable, real-time detection, classification and localisation of wireless emitters across the full pipeline.

Design and implement real-time I/Q pipelines in C++ and Python, build SDR apps with GNU Radio, and work with RF hardware and FPGA interfaces.

Qualifications

• Strong C++ (modern C++14/17+) and Python for production-quality, performance-sensitive code.
• Solid DSP knowledge: sampling, filtering, FFT, spectral estimation, synchronisation.
• Experience with SDR platforms (USRP/UHD, AD936x) and live I/Q data.
• Experience with GNU Radio or similar streaming DSP frameworks.
• Comfortable with Linux, CMake, Git, and debugging real-time systems.

Responsibilities

• Design and implement real-time I/Q processing pipelines in C++ and Python.
• Build SDR applications on GNU Radio and custom frameworks, including out-of-tree blocks.
• Implement signal detection, classification and parameter estimation (energy and cyclostationary detection, burst segmentation, carrier and symbol-rate estimation, modulation recognition).
• Implement direction-finding and localisation algorithms (phase interferometry, MUSIC/ESPRIT, TDoA) on coherent multi-channel SDRs.
• Drive SDR hardware from software: tuning, gain and sample-rate control, PPS/GPSDO timing, multi-channel phase coherence and calibration (USRP/UHD, AD936x, Matchstiq/Sidekiq-class platforms).
• Optimise for real-time performance: multi-threading, lock-free buffering, SIMD, GPU acceleration and profiling, to sustain wideband sample rates without drops.
• Build the surrounding software: capture and recording tools, replay and offline analysis, telemetry, configuration, and interfaces to the rest of the system.
• Work with the RF hardware and FPGA side on interfaces, data formats and system-level performance, and support lab measurement and field trials.
• Contribute to testing and validation: unit tests on synthetic signals, regression against recorded captures, and repeatable over-the-air test procedures.

Skills

C++ (modern)

Python

DSP fundamentals

GNU Radio

Linux development

CMake

Git

Real-time systems

Tools

USRP/UHD

AD936x

CUDA

Job description

Anashield in Denmark is seeking a software engineer focused on the signal-processing layer of Software Defined Radio. You will turn raw I/Q data from SDR front-ends into reliable, real-time detection, classification and localisation of wireless emitters across the full pipeline.

Design and implement real-time I/Q pipelines in C++ and Python, build SDR apps with GNU Radio, and work with RF hardware and FPGA interfaces.