Design, execute, or lead RF/microwave hardware and subsystem work, including front ends, LO/PLL, filters, mixers, PAs/LNAs, switches, couplers, and related high-frequency circuitry to meet specifications and acceptance criteria. Experience with advanced modeling, troubleshooting, and simulation-to-measurement correlation using tools such as LTspice, Ansys Designer, ADS, HFSS/CST, AWR, or SI/PI simulation.