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.

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.

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.

• 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 results back into the design
• Produce clear documentation, link budgets, test reports, interface definitions, that the rest of the team and our customers can actually rely on

• Have designed and integrated RF systems in a professional engineering context, ideally within aerospace, defence, or another demanding, safety‑critical domain
• Understand RF fundamentals deeply enough to reason from first principles, propagation, antenna theory, link budgets, modulation schemes, noise, and interference
• Have hands‑on experience with RF test and measurement equipment, and are comfortable debugging real hardware, not just simulation output
• Have worked on systems that need to survive a contested or degraded RF environment, or can reason confidently about what that requires even without direct experience
• Can interpret complex datasheets and specifications for RF components (amplifiers, filters, mixers, antennas) and translate them into sound design decisions
• Collaborate effectively across disciplines, electronics, software, systems and communicate clearly in written and spoken English

• Experience with electronic warfare (EW), signals intelligence, or counter-UAS RF systems
• Experience with radar or seeker RF front-end design
• Familiarity with SDR (software‑defined radio) platforms and associated tool chains (GNU Radio, MATLAB RF toolbox, or equivalent)
• Experience with antenna design and simulation tools (e.g. HFSS, CST)
• Exposure to relevant standards and spectrum regulations for defence or aerospace RF systems