Radio Frequency Engineer in London

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 involves designing and integrating radio frequency systems that operate in real, contested electromagnetic environments. You will 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.

The day-to-day responsibilities include:

• Designing and specifying RF front-ends, antennas, and associated hardware, considering gain, bandwidth, efficiency, size, and cost trade-offs.
• Owning link budget analysis for communications, telemetry, and/or seeker/radar systems.
• Working on resilience to a contested electromagnetic environment, jamming, spoofing, and interference.
• Integrating RF systems into the wider electrical architecture, managing grounding, shielding, and EMC considerations.
• Using RF test equipment to characterise, debug, and validate real hardware.
• Collaborating with electronics, software, and systems engineers to ensure RF subsystems integrate cleanly.
• Supporting field testing of RF and communications systems and feeding real-world results back into the design.
• Producing clear documentation, link budgets, test reports, and interface definitions.

You should apply if you:

• Have designed and integrated RF systems in a professional engineering context, ideally within aerospace, defence, or another demanding domain.
• Understand RF fundamentals deeply enough to reason from first principles.
• Have hands-on experience with RF test and measurement equipment.
• Have worked on systems that need to survive a contested or degraded RF environment.
• Can interpret complex datasheets and specifications for RF components.
• Collaborate effectively across disciplines and communicate clearly in written and spoken English.

Nice to Have:

• Experience with electronic warfare (EW), signals intelligence, or counter-UAS RF systems.
• Experience with radar or seeker RF front-end design.
• Familiarity with SDR platforms and associated toolchains.
• Experience with antenna design and simulation tools.
• Exposure to relevant standards and spectrum regulations for defence or aerospace RF systems.

Join Helsing and work with world-leading experts in their fields. Our work is important, contributing to the protection of democratic countries while balancing ethical and geopolitical concerns. We operate in a domain with unique technical requirements and constraints, where robustness, safety, and ethical considerations are vital.

What we offer includes competitive salary and VSOP options, relocation support, learning allowances, health and wellness benefits, social events, enhanced parental leave, family support, and a hands-on onboarding program.

Helsing is an equal opportunities employer, committed to equal employment opportunity regardless of race, religion, sexual orientation, age, marital status, disability or gender identity.