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RF Engineer II (R6053)

Shield AI· X-BAT Division – X-BAT Engineering - Avionics
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Seattle, WA$110k - $170kFull Time EmployeePosted 4w ago

About the role

RF and Microwave Hardware Design Engineer to design compact, high-performance RF modules for airborne and ground systems within Shield AI's X-BAT Engineering team.

Responsibilities

  • Design RF and microwave modules from requirements and architecture through schematic capture, component selection, layout, bring-up, verification, qualification, and production release, with scope and independence appropriate to level.
  • Design active and passive RF circuits such as low-noise amplifiers, power amplifiers, filters and multiplexers, RF switches, limiters, couplers, attenuators, power detectors, and frequency-conversion stages.
  • Develop RF front-end assemblies that meet gain, noise figure, output power, linearity, compression, efficiency, harmonic and spurious-emission, stability, isolation, and out-of-band rejection requirements.
  • Perform circuit and electromagnetic analysis using tools such as Keysight ADS, Cadence AWR, HFSS, or CST, and correlate models with measured hardware performance.
  • Create and review RF and mixed-signal PCB designs, including controlled-impedance routing, grounding, shielding, stack-up definition, power distribution, and placement of sensitive or high-power components.
  • Plan and execute laboratory characterization using network analyzers, spectrum analyzers, signal generators, noise-figure analyzers, power meters, oscilloscopes, and automated test equipment.
  • Diagnose difficult hardware issues involving instability, oscillation, intermodulation, self-interference, desense, thermal drift, mismatch, leakage, and electromagnetic coupling.
  • Work closely with mechanical, thermal, avionics, communications, antenna, manufacturing, and test engineers to integrate RF hardware into size-, weight-, power-, cooling-, and environmental constraints.
  • Develop verification methods, production test strategies, calibration approaches, and clear technical documentation that make designs repeatable and manufacturable.
  • Support environmental and electromagnetic qualification, supplier engagements, hardware integration, ground test, and flight test as needed.
  • Contribute to design reviews, share technical knowledge, and support the growth of interns and less-experienced engineers at a level appropriate to the position.

Qualifications

  • Bachelor's degree in Electrical Engineering, Applied Physics, or a related field, or equivalent practical experience.
  • Typically 1 or more years of relevant post-undergraduate experience for L2, or 2 or more years for L3. Applicable graduate study and research may count toward experience.
  • Hands-on experience designing, building, or debugging an RF or microwave circuit, module, or PCB assembly through measured verification.
  • Solid understanding of S-parameters, impedance matching, transmission lines, stability, gain and noise figure, linearity and compression, nonlinear products, isolation, and cascaded RF performance.
  • Experience creating or reviewing RF PCB layouts with controlled impedance, grounding, shielding, component placement, and signal-integrity considerations.
  • Proficiency with common RF laboratory instruments and calibration methods, with the ability to distinguish hardware behavior from measurement artifacts.
  • Ability to use simulation and measured data to make sound design decisions, document tradeoffs, and close requirements with objective evidence.
  • Clear written and verbal communication skills and the ability to work effectively with cross-functional engineering and manufacturing teams.
  • Ability to work on-site in a laboratory and hardware-development environment.

Skills

Required:RF/microwave circuit designRF PCB layout with controlled impedanceRF simulation and measurement correlationLab instrumentation

Benefits

  • Full-time regular employee offer package: Pay within range listed + Bonus + Benefits + Equity
  • Temporary employee offer package: Pay within range listed above + temporary benefits package (applicable after 60 days of employment)
Last updated Oct 23, 2026. Interested? Apply on the company site.

About Shield AI

Autonomy for the world.

Our mission is to protect service members and civilians with intelligent systems.

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