20+ Swift Experts - Available Now

Hire Swift Developers

Get dedicated Swift developers to build fast, native iOS, iPadOS, and macOS apps — from polished consumer experiences to complex, enterprise-grade Apple platform products.

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2-day risk-free trial
Pay nothing if you are not satisfied
Start in 48hrs
Developer joins your standups this week
Dedicated to your project
No split attention, no bench-sharing
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Why choose us?

A boutique shop, not a marketplace.

Pre-vetted engineers only

Every developer passes a 5-stage vetting process.

Dedicated to your project

Your developer works exclusively on your product.

Transparent billing

Hourly time tracking with daily reports. No hidden fees.

Instant replacement

We replace within 48 hours at no extra cost.

Your timezone, your tools

Developers overlap 4-8 hours with your working day.

Scale up or down anytime

Flexible contracts with no lock-in and no penalties.

The exact skill fit for your build.

Swift is Apple's modern, safe, and fast programming language for building apps across the entire Apple ecosystem — iOS, iPadOS, macOS, watchOS, and visionOS. With SwiftUI's declarative UI framework and Swift's strong type safety, teams can build polished, performant native apps that feel truly at home on Apple devices.

At ZonSource, our Swift developers have hands-on experience building consumer apps, subscription products, and enterprise iOS applications using SwiftUI and UIKit, integrating with Apple frameworks like Core Data, CloudKit, and StoreKit, and following Apple's Human Interface Guidelines closely. They work confidently with Combine and async/await for asynchronous code, and manage the full App Store submission and review process. Whether you need a new iOS app built from scratch, an Objective-C codebase modernized to Swift, or a developer to join your existing sprint cycle, our team ships polished, App Store-ready apps from day one.

ZS
Swift Developer
Senior · 5+ years avg.
SwiftSwiftUIUIKitCombineasync/awaitCore DataCloudKitStoreKitXcode
Current Stack
SwiftSwift
swiftuiswiftui
xcodexcode
Core DataCore Data
Apple EcosystemApple Ecosystem

Skills to look for when hiring.

Every Swift developer on our bench is evaluated against these core competencies.

Swift Language Fundamentals

Strong grasp of optionals, protocols, generics, and value vs reference types

SwiftUI & Declarative UI

Practical experience building modern, declarative interfaces with state-driven views

UIKit (for legacy/complex UI)

Ability to work with UIKit where SwiftUI alone isn't sufficient, and bridge the two

Concurrency (async/await, Combine)

Deep understanding of structured concurrency and reactive data streams

Core Data & Local Persistence

Skilled at modeling and managing local data storage efficiently

Networking & API Integration

Experience integrating REST APIs using URLSession or networking libraries

App Store Submission Process

Familiarity with provisioning profiles, App Store review guidelines, and TestFlight

Performance & Memory Management

Knowledge of ARC, retain cycles, and using Instruments to profile apps

Meet the bench.

A snapshot of Swift developers available now.

KO
Karan Oberoi
Senior iOS Developer
9 experience
SwiftSwiftUICombineCore Data
Shipped 20+ apps to the App Store across consumer and enterprise categories
AD
Ananya Desai
iOS Developer
6 experience
SwiftSwiftUIasync/awaitCloudKit
Specializes in subscription apps with StoreKit integration
LF
Leo Fontaine
iOS Developer (UIKit Legacy)
7 experience
SwiftUIKitObjective-C interopCore Data
Handles Objective-C to Swift migrations for long-running enterprise apps
Get a Shortlist Matched to Your Project

The full Swift lifecycle.

Everything your project needs, from first line of code to production deployment and beyond.

Custom iOS App Development

Build native iOS apps using Swift and modern SwiftUI interfaces

macOS & Multi-Platform Apple Development

Description: Extend your app across macOS, iPadOS, and visionOS using shared Swift code

Subscription & In-App Purchase Integration

Implement StoreKit-based subscriptions and in-app purchase flows

Objective-C to Swift Migration

Modernize legacy Objective-C codebases to Swift incrementally

Swift API & Backend Integration

Description: Connect iOS apps to REST APIs, CloudKit, and third-party services

iOS App Performance Optimization

Improve launch time, memory usage, and smooth scrolling performance

iOS Testing & Quality Assurance

Set up unit and UI testing with XCTest and manage TestFlight beta rollouts

iOS App Maintenance & Support

Ongoing bug fixes, iOS version compatibility, and feature updates

Simple, transparent pricing.

Share your requirements and we will put together a plan that gives you the best value.

Share Your Requirements · Get a Custom Quote

What clients say about the bench.

RS
Rachel Simmons
Founder - DailyBloom
★★★★★

ZonSource's Swift team built our entire iOS app with a polish that matched apps from much bigger

AC
Aman Chatterjee
CTO - VaultPay
★★★★★

Their iOS developer integrated our payment SDK and passed App Store review on the first submission.

JH
Julia Hoffmann
Product Lead - TrailMate
★★★★★

They migrated our old Objective-C app to Swift without losing a single feature or introducing new bugs.

Requirement to first commit, in under a week.

1

Share Requirements

Tell us your tech stack, project scope, and team needs

Day 1
2

Developer Shortlist

We match you with 2-3 pre-vetted Swift developers

Day 2
3

Interview & Select

Interview shortlisted developers, assess skills and culture fit

Day 3-4
4

Onboard & Start

Developer joins your standups, tools, and workflows

Day 5

 

 

When to Hire a Swift Developer vs a Flutter/React Native Developer

If your app is iOS-only, needs the deepest possible integration with Apple frameworks (CloudKit, StoreKit, HealthKit, ARKit), or must feel completely native to Apple's design language, a dedicated Swift developer is the right fit. Swift and SwiftUI give direct, first-party access to every new Apple API on day one of release.

A Flutter or React Native developer makes more sense if you need to launch on both iOS and Android from a single codebase and want to minimize duplicate development effort. Many teams choose native Swift specifically when iOS is the primary or only platform, or when deep platform integration matters more than cross-platform code sharing.

Swift developer interview questions.

Use these questions when evaluating Swift developers — or let us handle the vetting.

Q1. What is the difference between a struct and a class in Swift?

What to look for

Tests fundamentals — should cover value vs reference semantics and when to use each

Q2. How do optionals work in Swift, and what are safe ways to unwrap them?

What to look for

Should mention optional binding, guard statements, and avoiding force unwrapping

Q3. How does SwiftUI's state management work (@State, @Binding, @ObservedObject)?

What to look for

Tests SwiftUI depth — should explain when each property wrapper is appropriate

Q4. What is the difference between async/await and Combine?

What to look for

Should compare structured concurrency with reactive streams and when to use each

Q5. How do you prevent retain cycles in Swift?

What to look for

Should mention weak/unowned references and ARC behavior with closures

Q6. How would you approach migrating an Objective-C codebase to Swift?

What to look for

Look for an incremental, module-by-module migration plan rather than a risky full rewrite

Q7. How do you handle App Store rejection or review feedback?

What to look for

Tests practical experience with the submission process and common rejection reasons

Before you hire.

What skills should a Swift developer have in 2026?
Must-haves include core Swift fundamentals, SwiftUI for modern UI development, and async/await for concurrency. Strong additions include Combine, Core Data, and experience with the App Store submission process.
How long does it take to onboard a Swift developer?
Most ZonSource Swift developers can be onboarded and start contributing within 48 hours of finalizing requirements.
Should we build with SwiftUI or UIKit for a new app?
SwiftUI is Apple's recommended approach for new apps, offering faster development and cleaner code. UIKit is still relevant for apps needing very specific, complex custom UI or supporting older iOS versions.
Can you migrate our Objective-C app to Swift?
Yes, our team handles incremental Objective-C to Swift migrations, since both languages can coexist in the same project during the transition.
Do your Swift developers handle App Store submission?
Yes, our developers manage provisioning, App Store Connect setup, review guideline compliance, and the full submission and review process.
Do you offer a trial period before hiring a Swift developer full-time?
Yes, we offer a 2-day risk-free trial so you can evaluate the developer's skills before committing long-term.
Will the Swift developer work in our timezone?
Our developers offer 4-6 hours of daily overlap with US timezones and full overlap with European and APAC teams.

Hire developers by technology.

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