Radio Frequency Engineer

recruyt; San Francisco (CA); On-site; USD 140,000 - 190,000; Full time

Job summary

recruyt is seeking a Senior Antenna Engineer in San Francisco, on-site. The role is hands-on, owning antenna development end-to-end from architecture and EM simulation to prototyping, testing, certification, production and field performance.

You will design for ground-based and airborne hardware, work across sub-GHz to GNSS bands, and perform full-wave simulations using HFSS/CST/FEKO or equivalents. Collaboration across constrained hardware teams is essential.

Qualifications

• 5+ years designing antennas for production hardware.
• Strong fundamentals in electromagnetics, impedance matching, radiation, polarization, coupling and antenna efficiency.
• Hands-on experience with VNA, spectrum analyzers, signal generators and antenna chambers.
• Experience taking an antenna from concept through testing, certification and manufacturing.
• Experience with mechanically constrained products such as drones, robotics, IoT, mobile devices, vehicles or wearables.

Responsibilities

• Design and develop antennas for ground-based and airborne hardware.
• Work across sub‑GHz mesh (902-928 MHz), Wi-Fi, Bluetooth, LTE, CBRS and GNSS.
• Run full‑wave EM simulations using HFSS, CST, FEKO or equivalent.
• Design antennas into highly constrained, multi‑radio hardware.
• Own antenna measurement and validation across bench, chamber and field environments.
• Solve RF performance, isolation, coexistence and integration challenges.
• Support antennas through certification and volume production.

Skills

Antenna design

Electromagnetics

Impedance matching

Radiation patterns

Polarization

Antenna efficiency

Test equipment

VNA

Concept to production

Constrained hardware

Tools

HFSS

CST

FEKO

Antenna chambers

Job description

Senior Antenna Engineer | San Francisco, CA | Onsite

I'm working with my client, a fast-growing hardware and AI company building wireless sensing systems for real-world environments, to hire a Senior Antenna Engineer.

This is a hands‑on role owning antenna development end-to-end - from architecture and electromagnetic simulation through prototyping, chamber testing, certification, production, and field performance.

What you'll work on:

• Design and develop antennas for ground-based and airborne hardware
• Work across sub‑GHz mesh (902-928 MHz), Wi-Fi, Bluetooth, LTE, CBRS and GNSS
• Run full‑wave EM simulations using HFSS, CST, FEKO or equivalent
• Design antennas into highly constrained, multi‑radio hardware
• Own antenna measurement and validation across bench, chamber and field environments
• Solve RF performance, isolation, coexistence and integration challenges
• Support antennas through certification and volume production

What we're looking for:

• 5+ years designing antennas for production hardware
• Strong fundamentals in electromagnetics, impedance matching, radiation, polarization, coupling and antenna efficiency
• Hands‑on experience with VNA, spectrum analyzers, signal generators and antenna chambers
• Experience taking an antenna from concept through testing, certification and manufacturing
• Experience with mechanically constrained products such as drones, robotics, IoT, mobile devices, vehicles or wearables

Nice to have:

Sub-GHz / ISM band experience, FCC Part 15, anechoic chamber experience, outdoor hardware, Python/MATLAB and field RF testing.