Member of Technical Staff: iOS Engineer

Member of Technical Staff: iOS Engineer (Ego) Location: San Francisco, CA (hybrid) · Reports to: Founding team

About the role

Ego AI is a YC-backed applied AI research lab building the behavioral infrastructure for AI companions and agents. We work at the intersection of real-time conversational instincts, memory, and persistent identity; the layer that makes AI feel genuinely alive. We're a small, fast-moving team and we're defining a new category of human-AI interaction.

What you'll do

• Own the iOS surface for Ronin — our suite of AI agents — from design handoff to production
• Work directly with our designer and backend engineer to implement high-fidelity designs with precision and speed
• Build and maintain the core mobile experience: real-time voice interfaces, conversational flows, and agent interactions
• Ship fast, iterate with the team, and take full ownership of the mobile codebase

What we're looking for

Must have

• Shipped at least one consumer iOS app with real users
• Strong SwiftUI fundamentals and comfort owning a codebase end-to-end
• Ability to implement high-fidelity designs faithfully — pixel precision matters
• Always-ship mindset: you close loops, don't leave things in draft, and take pride in getting things out the door

Nice to have

• Experience building agentic or LLM-powered features on mobile
• Background in consumer apps — social, utility, or anything with high daily engagement
• Familiarity with real-time audio or voice interfaces
• Comfort working in a fast-moving, early-stage environment where the product is still being definedProjects this hire will own

Use AI tools freely. We do. You will walk us through the design and defend every trade-off, so own each decision in the repo.

Interview Process

How we hire

1. Intro chat (15-30 min).
2. Take-home: build a durable tool-using agent.
3. Live pairing (45 min): extend your own submission.
4. Behavioral interview
5. Founder conversation + references.