Swift and iOS app development services
iOS app development in Swift and SwiftUI for banking, shopping, media, health and education apps, Apple Watch and Apple Vision Pro apps, App Store releases, and the upkeep of UIKit and Objective-C apps, with dedicated Swift and iOS developers for your team or an app delivered end to end.
What we build with Swift and iOS
Native iPhone and iPad apps in SwiftUI
Swift 6.4 in the Swift 6 language mode, so data races are compile errors, with SwiftUI and Observation for the interface, SwiftData or Core Data for offline storage and features split into Swift packages, targeting iOS 27 and the older releases your users still run.
iOS banking and payment apps
Mobile banking, payment and trading apps with passkeys and Face ID sign-in, App Attest to prove requests come from your genuine app, keys held in the Secure Enclave and Keychain, and Apple Pay or card tokenisation through the payment provider’s SDK.
Retail and marketplace apps on iOS
Catalogues, carts and checkout with Apple Pay, universal links from campaigns, push notifications through APNs, Live Activities for orders and deliveries, and App Clips that let a customer pay without installing the full app.
Streaming, social and media apps on iOS
Video and audio on AVFoundation and AVKit with HLS, FairPlay Streaming, offline downloads and Picture in Picture, plus feeds, chat, SharePlay and Home Screen widgets that bring people back to the content.
UIKit and Objective-C maintenance
Older UIKit and Objective-C apps kept building and passing review on each new iOS release, then moved to Swift and SwiftUI screen by screen through UIHostingController, with CocoaPods dependencies replaced by Swift Package Manager.
App Store releases and TestFlight
Signed builds from Xcode Cloud, GitHub Actions or fastlane, TestFlight betas and phased releases, privacy manifests and the updated age rating questions answered before submission, and crash and hang rates watched in Xcode Organizer and Crashlytics.
Apple Watch and HealthKit apps
watchOS 27 apps in SwiftUI with workouts and HealthKit data, complications and Smart Stack widgets through WidgetKit, and Core Bluetooth companion apps for medical sensors and wearables, with health data encrypted and kept on the device unless the user shares it.
On-device AI in iOS apps
Summaries, document scanning, search and image classification built on the Foundation Models framework, which gives an app the on-device model behind Apple Intelligence, or on Core AI for your own models, so personal data stays on the phone.
visionOS apps for Apple Vision Pro
iPad apps brought to visionOS 27 and new spatial apps in SwiftUI and RealityKit, with windows, volumes and Full Space immersion for training, retail, design review and medical imaging.
Hire Swift and iOS developers
Dedicated Swift and iOS developers
Swift and iOS developers who join your team full time, work in your repositories, tracker and meetings, and report to your lead. You interview them; we carry the Ukrainian contract, payroll, invoicing and leave.
Swift and iOS project delivery
A team that takes the Swift and iOS project from scope to release: estimate, build, tests and deployment, with a technical lead on our side who owns the plan and the quality.
Swift and iOS support and take-overs
An existing Swift and iOS system taken over from another team or kept running: a read-only review and a written list of risks first, then fixes and new features in order of impact.
The dedicated team page explains how specialists join your team, and the outsourcing page covers project delivery, take-overs and how we charge.
Who works on your Swift and iOS project
iOS engineers
Swift, SwiftUI and UIKit
Back-end engineers
.NET, Java, Node.js or Python APIs the app talks to
Android and cross-platform engineers
Kotlin, .NET MAUI and React Native
UI and UX designers
Designs to Apple’s Human Interface Guidelines in Figma
QA engineers
Device testing and automation
How we work on Swift and iOS
Swift for all new code in the Swift 6 language mode with complete concurrency checking, SwiftLint in the pipeline, unit tests in Swift Testing and UI tests in XCTest with each feature, and dependencies through Swift Package Manager kept current, with a security advisory treated as an unconditional upgrade. Secrets stay out of the app bundle, and anything sensitive on the device sits in the Keychain or the Secure Enclave.
Developers work in your repositories, your tracker and your process. The Ukrainian contract, payroll, invoicing and leave stay with us, and everything they write is assigned to you.
Other languages we work in
Java development
Java development services: Spring Boot microservices, banking and payment systems, e-commerce and SaaS back ends, Kafka integrations and legacy modernisation, with dedicated Java developers or project delivery.
Node.js development
Node.js development services: TypeScript APIs, e-commerce and SaaS back ends, fintech integrations, real-time and streaming features and serverless functions, with dedicated Node.js developers or project delivery.
PHP development
PHP development services: Laravel and Symfony applications, e-commerce on Magento, Shopware and WooCommerce, APIs, WordPress and Drupal, and PHP upgrades, with dedicated PHP developers or project delivery.
C and C++ development
C and C++ development services: embedded firmware, Qt desktop software, network and telecom software, low-latency systems, security software and C++ modernisation, with dedicated C++ developers or project delivery.
Go development
Go development services: Golang microservices and APIs, fintech and SaaS back ends, Kubernetes operators, event pipelines and network and security software, with dedicated Go developers or project delivery.
Kotlin and Android development
Android app development services in Kotlin and Jetpack Compose for banking, media, shopping and health apps, plus Kotlin Multiplatform and Ktor back ends, with dedicated Kotlin developers or project delivery.
Rust development
Rust development services: backend services and APIs, blockchain and Web3, systems and infrastructure software, security tooling, embedded firmware and WebAssembly, with dedicated Rust developers or project delivery.
Scala development
Scala development services: Apache Spark pipelines, fintech and ad tech back ends, services on Akka, Pekko, ZIO or Cats Effect, Play apps and Scala 3 migrations, with dedicated Scala developers or project delivery.
TypeScript development
TypeScript development services: Angular, React and Vue front ends, Node.js back ends, full-stack apps, monorepos and JavaScript to TypeScript migrations, with dedicated TypeScript developers or project delivery.
Questions about Swift and iOS development
Which industries do your iOS developers work in?
E-commerce and retail (shopping, marketplace and loyalty apps), fintech and banking (mobile banking, payment and insurance apps), media and consumer apps (streaming, social and lifestyle apps), healthcare and fitness (patient, telemedicine and wellbeing apps), education (learning and tutoring apps), enterprise software (field service and internal apps), connected devices (companion apps for sensors and smart home hardware) and logistics (delivery and driver apps).
Do you have iOS developers on the team?
Yes. iOS engineers build native apps in Swift on our team, alongside .NET MAUI and React Native engineers for apps that share one codebase between iOS and Android.
Native Swift or cross-platform?
Both are on offer. Native Swift and SwiftUI when the app depends on platform features such as HealthKit, background work, widgets, Apple Watch or visionOS; React Native, Flutter, .NET MAUI or Kotlin Multiplatform when one codebase for iOS and Android matters more. An existing app continues in the stack it already uses.
Can you take over an old Objective-C app?
Yes. It starts with a read-only review of crashes, deprecated APIs, outdated dependencies and the build set-up, written up as a list of risks. The app is then brought onto the Xcode and SDK versions App Store Connect requires and moved to Swift screen by screen, each step released on its own.
How quickly can Swift and iOS developers start?
When the right iOS developer is available, the start is gated only by your interview and the NDA and IP assignment. Otherwise we run a search, which typically produces candidate profiles within two to three weeks, and nobody starts until you have said yes.
How do we hire Swift and iOS developers through BigTree108?
Tell us the work, the seniority and the hours you need. We propose one or two people with their profiles, you interview them the way you would interview your own hire, and you sign one agreement with BIG TREE 108 LLC and receive one invoice a month.
Who owns the work they produce?
You do. Every specialist has a signed contract with BigTree108 that assigns all work product to the company, and our agreement with you assigns it onward. Code, designs and documents are delivered into your own repositories and tools, not kept where only we can change them.
Building an iPhone, Apple Watch or Vision Pro app?
Tell us what the app does, who uses it and whether there is an Android version. You get an answer within one business day: a plan, candidate profiles or a first estimate for the release.