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TL;DR - 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.

Why Sweep?

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.

What makes this role special?

• One of the first 10 engineers shaping hardware systems pre-Series A.
• Own firmware that leaves the lab and operates in some of the world's highest-stakes environments.
• Work directly with the hardware lead across EE, firmware, and embedded systems.
• Operate in environments where hardware decisions have immediate consequences.
• Partner with RF, ML, and product teams to deliver integrated systems.
• Define the trust boundary between hardware and software.
  

What we're looking for...

• 4-8 years shipping reliable production systems.
• Polyglot engineer comfortable moving between TypeScript, Python, and systems languages like Rust or Go as the problem demands.
• Comfortable deploying and integrating with cloud systems like AWS or GCP in production environments.
• Obsess over software quality, reliability, and maintainability.
• Built production systems using LLMs, vector databases, and retrieval pipelines.
• Thrived in an early-stage startup.
• U.S. Person status required. May involve export-controlled data.
  

Bonus if you've...

• Built production web applications used by technical or operational teams.
• Built iOS applications or worked closely with native mobile teams.
• Integrated LLMs, vector databases, or graph-based reasoning into production products.
• Created secure operational dashboards, admin tooling, or internal developer platforms.
• Worked with IoT, BLE/Wi-Fi, spatial computing, or sensor-driven products.
• Optimized backend systems and databases under production load.
  

What you'll do...

• Own user-facing systems and internal tools.
• Build product systems across web, mobile, and internal tooling.
• Integrate with backend systems and deploy product-facing services.
• Turn customer workflows into production product capabilities using LLMs, graph reasoning, and sensor data.
• Ensure reliability through testing, automation, and tight feedback loops.
• Work directly with customers and deployments globally (~10-15% travel).
  

How we select...

• Short application
• 20-minute intro call
• Technical deep-dive
• Practical problem discussion
• References and offer
  

Final facts.

Base salary up to $220,000 depending on qualifications, experience, and impact. Total compensation includes equity, premium insurance, 401(k), flexible PTO, and other individual benefits.
You'll join us on-site at our HQ in New York City with occasional domestic and global deployments.
Apply. Build humanity's defense against machines.