Software Engineer, iOS

TL;DR — We’re building humanity’s defense layer for the AI age and are looking for a high-agency iOS Engineer to build the mobile surface where cyber-physical security meets the real world.

If you want to invent new categories, not just improve existing ones—this is that role.

Why Sweep?

As intelligent machines proliferate into every part of the physical world, humans still lack a defense layer to ensure the systems and devices we rely on remain aligned with us.

Sweep is building that layer today. Our tech is already deployed alongside some of the world’s highest-stakes teams—from decision-makers and elite market-movers to frontline journalists, chart-topping artists, record-breaking athletes, and history-bending scientists. What we learn there becomes the foundation for a civilization-defining capability.

We’re a small, talent-dense team with a bias for high ownership, high velocity, and low ego. We care deeply, move fast, and are here to build something that outlives us.

Together, we’ll redefine cyber-physical security for the AI age.

What makes this role special?

• Ship code from day one —validate it in the real world and harden it based on what breaks.
• Gain pre-Series A ownership as one of the first 10 engineers defining standards and culture.
• Work on a mobile product used in high-stakes environments where precision, latency, and reliability matter.
• Build never-seen-before cyber-physical systems .
• Operate with Bletchley-Park intensity—rapid feedback, real consequences, and deployments you might never discuss, but will never forget.
• Influence product direction and mobile roadmap.
  

What we’re looking for

• 5+ years shipping production-grade iOS applications.
• Mastery of Swift (Objective-C a plus) and Apple platform fundamentals.
• Deep understanding of performance, memory, and Human Interface Guidelines .
• Ability to operate under real-world constraints and ambiguity.
• Clear communication—turning messy inputs into shippable product.
• Startup urgency: independent, accountable, relentless execution.
• U.S. Person status required (may involve export-controlled data).
  

Bonus if you’ve

• Worked with Liquid Glass, ARKit or Metal already.
• Prototyped interactions in Figma and translated them cleanly into code.
• Optimized performance under demanding conditions.
• Built accessibility-first or globally localized mobile apps.
• Worked in a founding or early-stage startup environment.
  

What You’ll Do

• Build mission-critical iOS systems using Swift, SwiftUI, UIKit, and platform-native frameworks.
• Integrate sensors, location services, and on-device intelligence into real-time workflows.
• Own the iOS experience end-to-end—from early concepts and prototypes to production-grade interfaces.
• Partner closely with backend and forward deployed engineers to translate real-world constraints into product decisions.
• Own reliability through testing (XCTest), automation, and tight feedback loops.
• Continuously iterate—ship, observe behavior, fix what breaks, and ship again.
• Work directly with elite users globally (~10-15% travel).

How we select

• Short application
• 20-minute intro call
• Technical deep-dive
• Show us something you’ve built that makes you proud
• References and offer
  

Final facts.

Base salary up to $190,000 , depending on experience and impact.

Total compensation includes equity, premium insurance, and individual benefits.

You’ll join us on-site at our NYC HQ or in one of our pods in DC, LA, Austin or London.

Apply. Make history. Build humanity’s defense against machines.