recruyt is hiring: Senior Radio Frequency Engineer in San Francisco

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Stealth-mode startup. Mission-critical tech. Ground-floor opportunity.

Our client is an early-stage, stealth-mode company building a new kind of control plane for the physical world — blending hardware, software, and wireless sensing into one unified system. Their work enables real-time awareness, autonomous operations, and next‑gen physical security for high-value assets.

They’re backed by top investors and led by a founding team with backgrounds from Anduril, Tesla, Uber, and U.S. Special Forces.

We’re looking for a Lead RF Engineer to lead the design, development, and deployment of a modular software‑defined radio platform that powers a next‑gen wireless mesh sensing network.

What you’ll do

• Architect and build our SDR platform — from analog front‑end to software stack
• Lead systems‑level trade studies (RF topology, link budgets, SWaP, build vs. buy)
• Prototype and debug hardware for fast iteration and field testing
• Define RF capabilities, constraints, and performance requirements
• Collaborate closely with product, electrical, and firmware teams
• Hire and lead the RF team as we scale from concept to full deployment
• Drive manufacturing and RF system testing at scale

What we’re looking for

• Hands‑on experience designing SDR systems (RF front‑end, PA systems, filters, antennas)
• Deep familiarity with Wi‑Fi protocols, mesh networking, and OpenWRT
• Strong systems thinking: tradeoffs, architecture, and integration
• Prior experience building and leading RF teams
• Ability to move fast, build prototypes, and operate with limited direction
• Bonus: exposure to high‑scale manufacturing and ruggedized RF deployment

You’ll define the RF backbone of a mission‑critical sensing platform. This is a chance to build real, tangible tech — with autonomy, speed, and impact from day one.

Seniority level

Mid‑Senior level

Employment type

Full‑time

Job function

Computer and Network Security, Defense and Space Manufacturing, and Security and Investigations

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