Signal Processing Engineer

Job Description

Job Title: Signal Processing Engineer RF Protocol Reverse Engineering & Electronic Warfare Systems Location: On-Site (Preferred) | Remote (Exceptional Candidates) Company: 7 Darter Info Services Pvt. Ltd. Domain: Tactical ISR | Electronic Warfare | RF Intelligence E xperience: 410 Years (or PhD with demonstrated outcomes) Mission Context 7 Darter Info Services is developing a next-gen tactical Electronic Warfare (EW) platform capable of passive RF detection, protocol decryption, emitter geolocation (ToA, AoA, DoA), and RF fingerprinting to support counter-UAS, SIGINT, and battlefield intelligence . We are seeking an elite Signal Processing Engineer to lead this signal-chain transformation—from raw IQ to real-time threat decisions. Your Mission As the Signal Processing Lead , you will reverse engineer unknown RF protocols, extract emitter characteristics, and architect DSP chains capable of identifying and localizing signals-of-interest in contested, congested, and denied RF environments . Your work will fuel EW payloads on mobile, static, and drone-based platforms. Core Responsibilities Reverse Engineer RF Protocols (e.g., telemetry, C2, FSK/QPSK bursts) via IQ analysis using SDR platforms. Implement signal models to estimate: Time of Arrival (ToA) Angle of Arrival (AoA) via phase-difference or MUSIC/ESPRIT algorithms Direction of Arrival (DoA) using multi-antenna spatial processing Build and deploy robust pipelines for: RF fingerprinting (RFFI) and emitter ID Modulation classification using ML/DSP hybrids Frequency hopping and spread-spectrum detection Develop adaptive filters , beamformers , and matched filters for hostile environment operation. Work closely with FPGA and embedded engineers to move prototypes into real-time execution on constrained compute. Simulate scenarios using MATLAB, Simulink, or Python ; transition to C/C++ or VHDL where necessary. You’re Right For This If You Have: Proven experience in SDR-based signal intelligence , waveform decoding, and EW-related DSP. Ability to process raw IQ data , isolate signal-of-interest, and decode or classify protocols (even proprietary or encrypted). Strong understanding of: FFT-based processing , TDOA/AOA triangulation , and multipath mitigation Antenna array calibration, diversity gain, and spatial correlation Experience with tools like: GNU Radio, MATLAB, Simulink, BladeRF, USRP, HackRF, AD936x, Xilinx Zynq, TI DSPs Knowledge of LPI/LPD waveforms , burst signal detection , and anti-jamming techniques Deep insight into MIL waveforms , UAV telemetry , or custom drone protocols is a strong advantage Bonus Points For Experience with cognitive radio systems , spectrum sensing algorithms , or reconfigurable waveform engines Implementation of direction-finding algorithms like MUSIC, ESPRIT, Capon in real-world hardware Prior work with classified waveforms or SIGINT / COMINT environments Stack You'll Work With MATLAB, Simulink, PythonSDR StackGNU Radio, UHD, SoapySDRHardwareAD9363/AD9361, USRP N210/B200, Xilinx Zynq, LimeSDRReal-TimeC++, Embedded Linux, TI DSP, VHDL (FPGA team support) Why Join 7 Darter? Build India’s first defense-grade passive EW + RF analytics system for tactical deployment Collaborate with a cross-functional team spanning AI/ML, RF hardware, FPGA, embedded systems , and tactical defense experts Take R&D to field deployment— from lab to LoC Direct impact on national security and strategic edge To Apply: Send your resume, signal processing project samples (if public), and a brief note to info@7darter.com