Ryz Labs/Hire/MobileHire senior iOS developers fluent in Swift and SwiftUI
Senior iOS engineers from Latin America who build Swift and SwiftUI apps, modernize UIKit code and work with your team on US hours.
By the Ryz Labs team · Updated October 2026
Hiring iOS developers through Ryz Labs gets you senior engineers who have shipped Swift apps to the App Store and kept them stable through several iOS releases. They are vetted, in the top 1% of the engineers we interview, and they embed in your team, working in your repos, standups and release process. They work within an hour of US time zones.
What our iOS developers work on
iOS users notice dropped frames, awkward navigation and crashes, and they leave reviews about them. Our iOS engineers care about that level of polish, and they also handle the less visible work: architecture that scales across a team, reliable builds and releases that go out without surprises.
- SwiftUI applications built on the Observation framework, NavigationStack and modern data flow, with UIKit interop where SwiftUI falls short.
- UIKit modernization: moving older Objective-C or UIKit screens to Swift and SwiftUI incrementally, without a risky rewrite.
- Consumer and fintech apps with secure authentication, Keychain storage, biometric login and Apple Pay or StoreKit 2 purchases.
- Offline-first apps using SwiftData, Core Data or GRDB, with background sync and conflict handling.
- Platform features: widgets with WidgetKit, Live Activities, App Intents and Siri, push notifications and deep links.
- Release engineering: Xcode Cloud, fastlane or GitHub Actions pipelines, TestFlight distribution, code signing and phased App Store rollouts.
Skills we vet for
- Swift language depth: value versus reference semantics, protocols with associated types, generics, result builders and property wrappers.
- Swift concurrency: async/await, structured concurrency with task groups, actors, @MainActor, Sendable, and the stricter checking in Swift 6.
- SwiftUI: view identity and lifetime, state ownership with @State, @Observable and @Environment, and avoiding unnecessary view updates.
- UIKit: Auto Layout, diffable data sources, compositional layouts and the view controller lifecycle.
- Architecture: MVVM, The Composable Architecture or clean architecture variants, modularization with Swift Package Manager, and dependency injection.
- Memory and performance: ARC, retain cycles in closures, Instruments for leaks and time profiling, and smooth scrolling on older devices.
- Testing: XCTest and Swift Testing, snapshot tests, UI tests, and testable networking layers.
- App Store practice: review guidelines, privacy manifests and nutrition labels, App Tracking Transparency and crash reporting with Crashlytics or Sentry.
How we vet iOS developers
Our recruiters source iOS engineers across Latin America and look for apps they have actually shipped. ARC, our in-house system, ranks the pipeline. Candidates complete structured NTRVSTA AI interviews on Swift, concurrency, UI frameworks and app architecture. Recruiters review each candidate before and after, and you receive a curated shortlist. AI scores are advisory. Humans make every decision.
Sample interview topics
- A view model updates a published property from a background task and the app occasionally crashes or warns about main-thread updates. How do @MainActor, actors and Sendable checking in Swift 6 prevent this?
- A SwiftUI list stutters when scrolling and resets its scroll position after data refreshes. Explain view identity, why unstable IDs cause this, and how you would diagnose it with Instruments.
- A view controller is never deallocated after it is dismissed. Walk through finding the retain cycle with the memory graph debugger and fixing it with capture lists.
- Your app needs to work offline and sync when it reconnects. Describe the local storage choice, how you queue changes, and how you resolve conflicts with the server.
- You are adopting SwiftUI in a large UIKit app with 40 screens. Where do you start, how do you use UIHostingController, and how do you share navigation and state between the two?
Ways to hire iOS developers
| Option | Best for | Trade-offs |
|---|
| Freelance marketplace | A simple app prototype or a short fix before a release | Quality and Swift depth vary; ongoing maintenance and releases need continuity |
| Staffing or recruiting agency | Permanent iOS hires on your payroll | Senior iOS candidates are scarce; screening often skips concurrency and architecture; fees |
| In-house recruiting | Long-term owners of your flagship app | The senior iOS pool is narrow; searches can take months |
| Ryz Labs staff augmentation | Adding senior iOS engineers to your mobile team | Custom quote, scoped per team; your mobile lead sets priorities |
| Ryz Labs dedicated team | A new app or full rebuild with iOS, Android and back-end engineers together | Larger commitment; best when scope and design are defined |
Ryz is not the right fit if you want a self-serve marketplace for a quick hourly job, or need mobile engineers on European or Asian hours.
Why hire iOS developers from Latin America
Latin America has a mature mobile community. Large regional apps in delivery, mobility, e-commerce and fintech have trained many iOS engineers on apps with millions of users, and Apple's Developer Academy runs programs in Brazil that have fed the local talent pool for years. Many senior iOS developers there have also built apps for US clients.
Mobile releases are a team sport: designers, QA, back-end engineers and product all weigh in before a build goes to App Store review. Our iOS engineers work within an hour of US hours and communicate clearly in English, so release-day questions get answered while everyone is online.
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FAQ
Do your iOS developers use SwiftUI or UIKit?
Both. Most new work is in SwiftUI, but many production apps still rely on UIKit, and our engineers are comfortable moving between them and mixing the two.
Can you staff both iOS and Android?
Yes. We can add native iOS and Android engineers together, or React Native and Flutter engineers if you prefer a cross-platform approach.
How much does it cost to hire iOS developers through Ryz?
We give a custom quote, scoped per team. You get a plan, a price and the names of the people who would do the work before you sign.
What is the contract, and what time zone do they work in?
You sign one contract with Ryz. Our engineers work with us as independent contractors, and we handle paying them. They work within an hour of US time zones and join your standups and release reviews.
Questions we didn't answer? Email info@ryzlabs.com.