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ARQUIMEA , we are a technology company operating globally and providing innovate solutions and products in highly demanding sectors. Our areas of activity are Aerospace, Defense & Security, Big Science, Biotechnology and Fintech. Main function and scope: We are seeking a Defense Systems Engineer specialized in Software-Defined Radios to support the design, development, integration, verification, and deployment of advanced communications, electronic warfare, and mission-critical defense systems Core functions: · Define and manage system requirements for SDR-based defense communication systems. · Develop system architectures, interface definitions, technical specifications, and verification plans. · Support SDR system design, including RF front ends, waveforms, signal processing, embedded software, FPGA, and networking interfaces. · Perform RF and communications analyses, including link budgets, modulation performance, interference, coexistence, and resilience in contested environments. · Plan and execute integration, verification, validation, qualification, and field testing activities. · Troubleshoot system-level issues across RF, software, firmware, hardware, and networking domains. · Coordinate technical activities with hardware, software, FPGA, RF, cybersecurity, test, customer, and supplier teams. · Support secure and mission-critical defense system development, including COMSEC, TRANSEC, anti-jam, interoperability, and qualification considerations. · Prepare technical documentation, test reports, design reviews, and customer-facing engineering material. Required experience and candidate profile: -Bachelor’s or Master’s degree in Telecommunications Engineering, Electrical Engineering, Aerospace Engineering, Computer Engineering, Physics, or a related technical field. -+5 years of experience in defense systems engineering Technical Requirements: Training / specific knowledge required in: · Experience in systems engineering for communications, RF, electronic warfare, radar, or defense systems. · Practical knowledge of Software-Defined Radio architectures and platforms. · Understanding of RF communications principles, modulation, coding, synchronization, filtering, spectrum management, and signal processing. · Experience with requirements management, system architecture, interface definition, and verification planning. · Familiarity with laboratory RF equipment such as spectrum analyzers, signal generators, vector network analyzers, oscilloscopes, power meters, and SDR test setups. · Ability to troubleshoot complex multidisciplinary systems involving RF, digital signal processing, embedded software, FPGA, and networking components. · Strong written and verbal communication skills. · Ability to work in multidisciplinary teams and interface with customers or external partners. Nice-to-have training / specific knowledge: · Experience with tactical communications, military radios, datalinks, SATCOM, EW, SIGINT, ELINT, or radar systems. · Experience with SDR platforms such as Ettus/USRP, Analog Devices, Xilinx RFSoC, LimeSDR, Red Pitaya, or defense-grade SDR hardware. · Knowledge of GNU Radio, MATLAB/Simulink, Python, C/C++, VHDL/Verilog, or embedded Linux. · Familiarity with waveform standards, military communication protocols, or NATO/STANAG-related systems. · Experience with FPGA-based signal processing or RFSoC-based architectures. · Knowledge of secure communications, encryption interfaces, key management, COMSEC/TRANSEC concepts, or classified system environments. · Experience with model-based systems engineering tools such as Cameo, Capella, Enterprise Architect, DOORS, Jama, Polarion, or similar. · Knowledge of defense qualification standards such as MIL-STD-810, MIL-STD-461, MIL-STD-464, MIL-STD-882, or equivalent. · Experience in field trials, military exercises, or cus