Senior iOS Engineer, Founding Team (SwiftUI)

stealth ai startup (la/sf) • Los Angeles Metropolitan Area

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AI Summary

Join a stealth, pre-seed AI startup in LA/SF as a founding iOS engineer owning the iPhone app end to end. Build secure sign-in, device pairing/approval, notifications, sync, offline behavior, and large-asset delivery to iOS and macOS. Requires 8+ years of software engineering, 4+ shipping production SwiftUI iOS apps, and experience with App Store releases, staged rollouts, and rollback.

Key Highlights

Pre-seed, stealth AI startup assembling its founding engineering team in LA/SF; full details under NDA.

Own the iPhone app end to end: SwiftUI, secure sign-in, device pairing/approval flows, notifications, sync, and offline behavior.

Deliver hundreds-of-MB assets (e.g., ML models, media) to iPhone and Mac with a versioned catalog, CI signing/publishing, and background download/verification.

Roll out releases in stages with automatic rollback and a kill switch for bad releases; accountable for production stability and performance.

Competitive salary, relocation assistance, benefits, equity, and visa support.

Key Responsibilities

Build and own the iPhone app in SwiftUI, including secure sign-in, device pairing and approval flows, notifications, sync, and offline behavior.

Own delivery of large assets to Mac and iPhone apps, including the versioned catalog and the CI job that signs and publishes each release.

Implement background download and verification of large assets before use.

Roll out asset releases in stages with automatic rollback and a kill switch to disable bad releases.

Keep the iPhone app within memory, background, and energy limits, measured with Instruments.

Launch and maintain the iPhone app from beta through App Store release, including beta programs, phased rollouts, and A/B experiments.

Take accountability for stability, performance, and quality in production.

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Technical Skills Required

Swift SwiftUI iOS native development

Benefits & Perks

Competitive salary

Relocation assistance

Great benefits

Equity

Visa support

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Nice to Have

Shipped an Apple app that loads ML models with Core ML or MLX, including packaging models for download and loading within memory limits

Experience with Metal or Accelerate

Built the publishing side of downloadable content: a versioned catalog or manifest and a CI job that signs and publishes each release

Delivered downloadable content to a Mac app as well as an iPhone app

Experience with Background Assets or Apple-hosted asset packs

Experience with Network framework or Bonjour for local device communication

Experience with notification service extensions and rich notifications with App Groups

Release automation with Xcode Cloud or fastlane

Deep experience with Instruments for memory-limit and energy investigations

Job Description

About

We're a stealth AI startup building an agentic AI product and assembling our founding team in LA/SF. We're pre-seed funded and heads-down until launch. Full details are shared under NDA once we connect. We offer competitive salary, relocation assistance, great benefits, and equity, and visa support.

Description

This role is for an iOS engineer who has owned an iPhone app end to end and delivered large assets, such as media, game content or ML models, to devices. It is not for you if your iOS work has been screens on top of someone else's networking, an SDK, a cross-platform framework, or delivery on the server side only.

In this role, you will:

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Job Overview

Posted Date Sep 28, 2026

Employment Type Full-time

Experience Level Mid-Senior level

Location Los Angeles Metropolitan Area

Category Mobile

Company stealth ai startup (la/sf)

Mentioned Skills

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