Firmware Engineer: Embedded Security for Real-World Systems

Sweep360 Inc.; New York (NY); On-site; USD 132,000 - 220,000; Full time

Benefits offered by this job

Equity

Premium insurance

401(k)

Flexible PTO

Job summary

Sweep360 Inc. seeks a Firmware Engineer to own firmware across RTOS, embedded Linux, wireless radios, GPS, and custom hardware, delivering reliable code that works outside the lab and survives real-world conditions.

You will collaborate with the hardware lead, RF and ML teams, perform adversarial reviews, and implement secure boot and OTA updates to tighten the trust boundary between hardware and software.

Qualifications

• 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).

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.

Skills

Systems-level firmware

C programming

Red teaming / adversarial testing

Rust / Zig / C++

Security mindset

Tools

RTOS

Embedded Linux

Rootfs / systemd

Job description

Sweep360 Inc. seeks a Firmware Engineer to own firmware across RTOS, embedded Linux, wireless radios, GPS, and custom hardware, delivering reliable code that works outside the lab and survives real-world conditions.

You will collaborate with the hardware lead, RF and ML teams, perform adversarial reviews, and implement secure boot and OTA updates to tighten the trust boundary between hardware and software.