Firmware Engineer, Secure Systems

Sweep360•New York, NY

4d•$0 - $220,000•Onsite

About The Position

We’re building humanity’s defense layer for the AI age and are looking for a Firmware Engineer to build systems that operate in real environments and survive contact with reality. If you would have joined Nest before connected devices became commonplace—or Figure AI before humanoids left the lab—to build the firmware that made them trustworthy, this is that role. As intelligent machines proliferate into every part of the physical world, we humans still lack a defense layer to ensure the systems and devices we rely on remain aligned with us. We’re building that layer today by deploying alongside the world’s highest-stakes teams — Olympic delegations, F1 paddocks, halftime shows, global tours, studio productions, senior government officials, and executive protection units. What we learn there becomes the foundation for a civilization-defining capability. We’re a small, talent-dense team with high ownership, high velocity, and low ego. We care deeply, move fast, and are here to build something that outlasts us. Together, we’ll redefine cyber-physical security for the AI age.

Requirements

3–6 years writing systems-level firmware for embedded targets with real depth, not glue code on top of HALs
Strong command of C with the ability to adopt new systems languages (Rust, Zig, C++) when appropriate.
Proven background in red teaming, offensive security research, or adversarial testing targeting embedded systems and physical hardware.
Reasons about trust boundaries, failure modes, and adversarial inputs before they become vulnerabilities.
Thrived in an early-stage startup.
Comfortable operating without perfect specs or complete information.
U.S. Person status required (may involve export-controlled data).

Nice To Haves

Shipped firmware on microcontrollers and OS-based embedded systems.
Written firmware for systems with secure boot, verified OTA, or hardware-enforced trust boundaries
Done RF/SDR-adjacent work or integrated wireless radios at the firmware layer
Maintained embedded Linux systems (custom rootfs, systemd services, power management)
Held a security certification or contributed to a CVE, hardware CTF, or published security research.

Responsibilities

Own firmware across RTOS, embedded Linux, wireless radios, GPS, and custom embedded hardware.
Write and maintain system daemons and firmware modules with strict fault isolation
Own secure boot and verified firmware update pipelines end-to-end
Conduct adversarial review of firmware attack surfaces (e.g. USB, BLE, UART, OTA) and close what you find
Partner with RF and ML teams on high-throughput signal capture and real-time processing pipelines.
Build and maintain hardware validation tooling; reduce bring-up friction on every successive board spin.