Senior iOS Mobile Developer - Swift / SwiftUI - Remote Contract
About HeartStamp HeartStamp is an AI-native consumer brand building a category-defining hyperpersonalization product. Our web product is live in the US. We are now building our flagship iOS app. We are a small, founder-led, distributed team. We move fast, we ship, we hire well. The Role We are hiring a Senior iOS Engineer to own end-to-end delivery of our iOS app. Design is in production. The supporting platform is already running. You are the primary iOS engineer on the project. This is a hands-on role. You write production Swift every day, make the architecture calls, and ship to the App Store.
What You'll Do
- Own the iOS app end-to-end: architecture, networking, state, navigation, offline, App Store submission.
- Build a fast, polished native experience in Swift and SwiftUI on top of our existing platform APIs.
- Integrate with AI/LLM systems, including streaming responses to the UI.
- Implement payments cleanly (Stripe iOS SDK, Apple Pay, StoreKit 2).
- Handle media on device: camera, PhotoKit, image upload, live preview at production quality.
- Ship to TestFlight on a weekly cadence and drive App Store Connect submission.
- Use Claude, Codex, Cursor, or your preferred AI coding tools as a daily force multiplier.
What We're Looking For
- 5+ years of professional iOS development
- 3+ App Store apps shipped as lead or sole iOS engineer
- Deep Swift / SwiftUI / Swift Concurrency. UIKit when SwiftUI is the wrong tool
- WKWebView + JS bridge experience on a hybrid app
- Stripe iOS SDK, Apple Pay, and StoreKit 2 in production
- AI / LLM API integration on mobile (streaming, retries, content safety)
- Strong networking, caching, and offline strategy
- iOS CI/CD (Fastlane, Xcode Cloud, or GitHub Actions) and TestFlight release management
- XCTest, snapshot testing, Sentry or comparable crash analytics
- AI-native daily workflow
- Strong written English. At least 4 hours of US Pacific overlap
Nice to Have
- Android (Kotlin / Jetpack Compose) production experience
- Canvas / drawing / design-tool app experience
- Print or e-commerce product experience
Engagement Terms
- $5,000-$5,500 USD/month for EET and Latin American candidates ($60K-$66K/year). US and Canadian candidates welcome but compensation will be benchmarked separately to local market rates.
- Full-time independent contractor, monthly retainer
- 50 hours/week with flexibility for ship-week sprints
- Performance and compensation review at 91 days
- Remote, with at least 4 hours of US Pacific overlap
Timeline
- Posting opens: Tuesday April 28, 2026
- Resume + screening review: rolling, starting May 1
- Final interviews: May 11 to May 15
- Target start date: Monday May 18, 2026
To Apply Submit your resume. Strong candidates get a screening questionnaire, then a technical call, then a paid technical exercise. Contact: [email protected] Education: Bachelor's (Required) Experience: iOS development: 5 years (Required). App Store apps shipped as lead: 3 (Required). WKWebView + JS bridge: 1 production app (Strongly Preferred). Language: English (Required) Work Location: Remote (Americas, Europe, South America) Pay: $60,000.00 - $65,000.00 per year Benefits:
- Flexible schedule
Work Location: Remote Apply tot his job Apply To this Job