Radio Frequency Engineer

Who we are Helsing is a defence AI company. Our mission is to protect our democracies. We aim to achieve technological leadership, so that open societies can continue to make sovereign decisions and control their ethical standards.  As democracies, we believe we have a special responsibility to be thoughtful about the development and deployment of powerful technologies like AI. We take this responsibility seriously.  We are an ambitious and committed team of engineers, AI specialists and customer-facing programme managers. We are looking for mission-driven people to join our European teams – and apply their skills to solve the most complex and impactful problems. We embrace an open and transparent culture that welcomes healthy debates on the use of technology in defence, its benefits, and its ethical implications.  The role Every platform we build has to talk to something, a ground station, a network, a seeker, another aircraft and it has to keep talking when someone is actively trying to stop it. That link doesn't get to be an afterthought.  As an RF Engineer on the Physical Products team, you'll design and integrate the radio frequency systems that make our platforms work in the real, contested electromagnetic environments they're built for, not a clean lab bench. You'll work across the full chain, from antenna and front-end design through to link budgets and EW resilience, and you'll be hands-on: designing, building, testing, and fixing real RF hardware, not just modelling it. This is a role for someone who wants their design decisions tested against a real environment, not just a spec sheet.  The day-to-day Design and specify RF front-ends, antennas, and associated hardware, reasoning through gain, bandwidth, efficiency, size, and cost trade-offs for a given platform and mission  Own link budget analysis for communications, telemetry, and/or seeker/radar systems, translating range, data rate, and reliability requirements into a defensible RF architecture  Work on resilience to a contested electromagnetic environment, jamming, spoofing, and interference and design systems that degrade gracefully rather than fail outright  Integrate RF systems into the wider electrical architecture, managing grounding, shielding, and EMC considerations so RF performance survives contact with the rest of the platform  Get hands-on with RF test equipment, spectrum analysers, VNAs, signal generators to characterise, debug, and validate real hardware, not just simulate it  Work closely with electronics, software, and systems engineers to ensure RF subsystems integrate cleanly with power, structure, and the rest of the avionics stack  Support field testing of RF and communications systems, including range trials and EW/interference testing, and feed real-world result...