Radio-Frequency Engineer

About WISeSat :WISeSat AG is building a cutting-edge Low Earth Orbit (LEO) satellite constellation to deliver secure messaging across Switzerland and Europe. Leveraging proprietary post-quantum encryption, we provide trusted communications for private clients and institutional partners.The Role :We’re seeking an experienced RF Engineer to design, build, and optimize the RF links that power our constellation—covering satellite-to-ground, satellite-to-user, and inter-satellite connections. You’ll report to the Project Manager and work across the full lifecycle, from architecture and design through integration, validation, launch support, and operations.What You’ll Do :Own RF system design for space and ground segments to ensure reliable, high-performance links in LEO.Perform link budgets, interference analyses, and end-to-end performance simulations; optimize for bandwidth, latency, and availability targets.Define and validate payload RF requirements; contribute to hardware selection and architecture (antennas, LNAs/HPAs, filters, converters, transceivers).Manage and technically steer selected industrial partners and suppliers; track deliverables and quality.Ensure compliance with international spectrum regulations and support frequency coordination activities.Collaborate closely with Telecom, Systems, and Software teams to align RF designs with mission objectives and constraints.Document designs, test plans, and results; contribute to design reviews and operational readiness.What You Bring :Master’s degree in RF, Telecommunications, or Electrical Engineering.3–5 years of hands-on experience in RF design and test for satellites or comparable wireless systems.Strong grasp of LEO-specific RF challenges.Familiarity with spectrum regulation and frequency coordination for satellite communications.System-level thinking: telecom architecture for constellations (e.g., band selection such as S-/L-band, payload configurations, and inter-satellite link concepts—optical or RF).Ability to lead simulations and modeling of signal propagation, interference, and system performance.Clear communication skills, collaborative mindset, and meticulous attention to detail; comfortable working with cross-functional teams and external partners.Working proficiency in English; French is a plus.Why WISeSat :Join a small, high-impact team where your decisions matter. You’ll follow our next-generation satellites from design through launch and operations—challenging, rewarding, and genuinely innovative.