Firmware Engineer
About the job
- Have 3–6 years of experience writing systems-level firmware for embedded targets, with depth beyond glue code on top of hardware abstraction layers.
- Have a strong command of C and the ability to adopt systems languages such as Rust, Zig, and C++ when appropriate.
- Have a background in red teaming, offensive security research, or adversarial testing targeting embedded systems and physical hardware.
- Reason about trust boundaries, failure modes, and adversarial inputs before they become vulnerabilities.
- Have experience thriving in an early-stage startup.
- Be comfortable operating without perfect specifications or complete information.
- Have U.S. Person status; the role may involve export-controlled data.
- Own firmware across real-time operating systems, 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 reviews of firmware attack surfaces, including USB, Bluetooth Low Energy, UART, and over-the-air updates, and address discovered issues.
- Partner with radio frequency and machine learning teams on high-throughput signal capture and real-time processing pipelines.
- Build and maintain hardware validation tooling and reduce bring-up friction on each successive board spin.
- Have shipped firmware on microcontrollers and operating-system-based embedded systems.
- Have written firmware for systems with secure boot, verified over-the-air updates, or hardware-enforced trust boundaries.
- Have done radio-frequency/software-defined-radio-adjacent work or integrated wireless radios at the firmware layer.
- Have maintained embedded Linux systems, including custom root filesystems, systemd services, and power management.
- Hold a security certification or have contributed to a CVE, hardware capture-the-flag event, or published security research.
About the company
Sweep360 provides a personal cyber risk management platform for mobile and remote workers. Its mobile app uses on-device sensors, AI, and augmented reality to detect IoT devices around the user and flag risks such as hidden cameras, GPS trackers, and suspicious Wi-Fi activity. Unlike enterprise-focused security tools, it targets individuals with real-time, in-situ threat detection delivered through AR overlays. Its stated goal is to help remote and mobile workers understand, visualize, and reduce cyber risk in their immediate surroundings; it appears to be out of business as of July 28, 2025.
Company Size
1-10
Company Stage
N/A
Total Funding
N/A
Headquarters
Washington DC, District of Columbia
Founded
N/A
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Simplify's Take
What believers are saying
- Sweep360's website listed six open roles on August 20, 2026, including ML and firmware.
- A September 11, 2026 LinkedIn profile shows an iOS engineer starting January 2026.
- Third-party job boards mirror active hiring in New York, suggesting operational continuity.
What critics are saying
- PitchBook labeled Sweep360 Out of Business on July 28, 2025.
- No funding, revenue, or customer disclosures surfaced, so distribution looks nonexistent.
- A zombie website can vanish without product traction, ending the company in 2026.
What makes Sweep360 unique
- Sweep360 combines on-device sensing and AR to detect hidden cameras, trackers, and rogue WiFi.
- Its niche targets mobile workers' physical environments, not generic endpoint security.
- The 2026 site still markets a Ubiquitous Defense Layer, signaling a broad security ambition.
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Benefits
- Health Insurance
- Company Equity