Hire the best Swift developers

Check out Swift developers with the skills you need for your next job.

Clients rate Swift developers
Rating is 4.8 out of 5.
4.8/5
based on 8,993 client reviews
Kerre D.
$55/hr
  • Trophy Icon Swift
  • iOS Development
  • Objective-C
  • iPhone App Development
  • iPad App Development
  • Android App Development
  • Core Data
  • REST
  • UIKit
  • Core Bluetooth

Freelance iOS developer working in Swift and Objective-C. 6 years experience building for iOS. 3 years experience building and updating Android applications in Java. I love my work as a mobile developer, and I welcome the opportunity to bring my enthusiasm and skills to your next project! My emphasis is on developing data-driven applications for small businesses largely or internal use, however I have also developed and published a number of different types of apps. Several of my published projects are listed below for your review. I have worked both developing projects from scratch as well as taking over existing codebases in order to...

Tiago L.
$54/hr
  • Trophy Icon Swift
  • iOS Development
  • Objective-C
  • Mobile App Development

I've been working as an iOS Developer for 9 years. Experienced in both Swift and Objective-C, I have developed apps for the iPhone, iPad and also Apple Watch. I've worked on Android too, both Java and Kotlin. I have submitted many apps to the App Store, with complex interfaces, extensive web service communication, and multimedia content. Some of these apps got good references in the press, and one of them, Back in Time, was selected by The New York Times as one of the Top 10 iPad apps of the year.

Samir S.
$100/hr
  • Trophy Icon Swift
  • C++
  • Computer Vision
  • AR
  • OpenCV
  • FFmpeg
  • iOS
  • iPhone App Development
  • macOS
  • Apple Xcode
  • iOS Development
  • Mobile App Development

Customer satisfaction is what drives sales. When you hire me, you are hiring someone who understands how important it is for your clients to have a product they love, a product that runs smoothly and makes their lives easier. That is why, whatever programming task you give me, I always have the end user in mind, making all these tiny design and coding decisions needed to contribute to an overall great customer experience. My main programming language is C++, but throughout my lifelong experience working and programming with computers, I have worked with many others, some of which I have listed in the tags below. So if you are looking for a...

Andrew D.
$75/hr
  • Trophy Icon Swift
  • Objective-C
  • iOS Development
  • iOS

You're looking for an app, I want to help. Maybe it's a great idea you have, or an extension of your online presence. Maybe you're a startup that needs a proof of concept, or you have an existing app that needs some updates or feature changes. These are some of the many ways I can provide value for you. Take a look at some of my apps on the app store at appsbyandrew.com I’ve been building iOS apps professionally for over five years, and recreationally for almost ten. I have a good eye for UI design and can make apps that look and function as well or better than the most popular on the App Store. I've paid close attention to the patterns and...

Gregg G.
$150/hr
  • Trophy Icon Swift
  • iOS Development
  • iPhone App Development
  • iPad App Development
  • Firebase
  • Objective-C
  • Mobile App Development
  • iOS
  • iPadOS
  • Android App Development

✅ Upwork Top Rated & Verified Mobile Developer Apple App Store Rankings: #74 Overall | #5 Sports | #25 “What’s Hot” | #11 Productivity ✔︎ 5-star rated | 100% Job Success | 10+ years experience ✔︎ 75+ projects completed | 50+ apps published to Apple App Store / Google Play ✔︎ Extensive iOS and Android experience (Swift, Objective-C, Kotlin, Java) Creating a modern app is a challenging task, so having someone to help you navigate through the many complexities of not only creating the app, but also getting it live on the store is necessary. I realize how important this project is to you, and with my experience and track record I will...

Byron E.
$26/hr
  • Trophy Icon Swift
  • Mobile App Design
  • Mobile App Development
  • Mobile Programming Languages
  • Photo Editing
  • Interactive Design
  • Digital Design
  • iOS

App Developer, Audio/Photo Designer. Eager to go the extra mile to bring life to your next project. Skills: - Preferred languages include (but not limited to): C, C++, Obj-C, Swift, Java, Html, Php, Javascript - Audio (for games or audio plugins) - Web, Native, and Hybrid app dev for both iOS and Android - UI (frontend and backend) - SpriteKit, SceneKit, and ARKit (iOS) - Admob integration - Firebase infrastructure A few other skills: - Photo editing - Icon design - Audio Production - Custom user interface sounds Get in touch with me and let's see what we can accomplish together.

Joseph H.
$85/hr
  • Trophy Icon Swift
  • iOS Development
  • Objective-C
  • UIKit
  • Node.js

I have been working professionally as an iOS Developer for over 7 years now. Through those years I have become advanced in developing full feature apps in both Objective-C and swift. Many of the apps I have worked on are very high profile with names you would recognize. Although I can easily develop all aspects of an iOS app from the networking layer to the front end, I am particularly good at mobile analytics and front end development. I am by far strongest in iOS development, but I also am well versed in a variety of other frameworks and languages. These include: Wordpress Ruby on Rails PHP JQuery AngularJS. As a final note, I...

Vasilii U.
$49/hr
  • Trophy Icon Swift
  • iPhone App Development
  • iPad App Development
  • iOS Development
  • Firebase
  • Git
  • Upwork API
  • LimeSurvey

I create products for iOS from scratch, I build modern, enterprise-ready and well commented code without memory leaks. Best practices are not just words for me, I'm constantly upgrading my skills and check my coding approaches. Tired of losing half-days waiting for freelancer responses? I can give daily reports on the progress of your application, and I'm available 10 hours a day to answer any of your questions. All of your tasks will be recorded in an issue-tracking system, so you can rest easy knowing nothing will get lost along the way. I use Continuous Integration and push working copies of the application to the working branch daily,...

Ovsep K.
$50/hr
  • Trophy Icon Swift
  • Objective-C
  • Multithreaded Programming
  • JSON
  • WebRTC
  • Video Stream
  • Design Patterns
  • Core Data
  • Reactive Programming
  • iOS Development

GREETINGS AND WELCOME TO MY PROFILE! I am a certified iOS Developer-Professional having over 10 years of proven work experience. My professional experience includes development in most of iOS Frameworks in almost all iOS layers. I think my professional and educational backgrounds make me an asset to Mobile Development. Below are my most important skills and qualifications: ✅ Solid understanding of the full mobile development life cycle ✅ A deep familiarity with Swift, Objective-C and Cocoa Touch ✅ Experience working with iOS frameworks such as Core Data, Core Animation, Core Graphics, Core Text, etc. ✅ Experience with...

Vladislav S.
$60/hr
  • Trophy Icon Swift
  • iOS Development
  • iPhone App Development
  • iPad App Development
  • Apple Xcode
  • Firebase
  • User Authentication
  • Design Patterns
  • Model View Presenter

I'm an experienced application developer. My specialization is native iOS development. I've been working on a lot of projects and I've been using a lot of good programming practices and patterns. One of my strengths is the quick solution of tasks of any complexity, without loss of quality of the program code

Milos M.
$50/hr
  • Trophy Icon Swift
  • iOS Development
  • Twilio API
  • RxSwift
  • Model View ViewModel
  • Realm Database
  • VoIP
  • Chat & Messaging Software
  • GraphQL
  • Apollo

Swift, clean code, research, and a cup of coffee - Let's talk about your app! Part of a top-rated team of mobile and web developers Agile approach, Web, iOS, and Android solutions, UI/UX, and well-documented project management - let's talk about your app! ✅ MVVM-C ✅ RxSwift ✅ GraphQL & Apollo ✅ REST & Moya ✅ Live Video Streaming ✅ Social Network ✅ VOIP ✅ Firebase ✅ IAP, RevenueCat

Yurii N.
$65/hr
  • Trophy Icon Swift
  • Firebase
  • Native App Development
  • Cocoa API
  • UIKit
  • API
  • App Store
  • ARKit
  • Core Animation
  • Core Data
  • In-App Purchases
  • RealityKit
  • iOS Development
  • iOS
  • Python

Are you looking for a Top Rated Swift engineer and a fluent English speaker to build your brand new iOS app? With over 5 years of commercial experience and an extensive skillset, I’m here to help you achieve amazing results at an impressive pace. I specialize in: — iOS app development (UIKit, SwiftUI) — macOS app development (Cocoa, SwiftUI) — Swift cloud service development — Product management & expert advice for software projects. I have worked with most of the popular Swift frameworks, including 3D packages like ARKit and SceneKit, cloud-based solutions like Firebase and AWS, as well as various database providers. For a full resume,...

Maksym K.
$25/hr
  • Trophy Icon Swift
  • Scala
  • Java
  • C++
  • HTML5
  • Objective-C
  • Git
  • Cocoa Touch
  • SQL
  • Mathematics

Hello, my name is Max and I'm mobile and back-end developer with ~6 years of experience. I specialize in creating mobile applications for iOS. Also I can create complex back-end solutions for web and software projects. Despite I’m a programmer, math is my passion, I’m good at calculus, number theory, linear algebra, combinatorics and probability theory Below you can find a full list of my skills: Swift: Cocoa Touch, OOP, Protocol oriented programming, VIPER, Redux, CocoaPods, Swift Package Manager, Cartridge, SwiftUI, Core Data, FireBase, SwiftPhoenixClient, StarScream, Crashlytics, XCTest, SwiftLint, R.swift Java: Hibernate, REST, Jersey,...

Seraphim K.
$80/hr
  • Trophy Icon Swift
  • watchOS
  • iPad App Development
  • Mobile App Development
  • RESTful API
  • Apple Xcode
  • RxSwift
  • macOS
  • Core Data
  • UIKit
  • StoreKit
  • Firebase
  • MapKit
  • Swift Expert
  • iOS Development

Welcome to my profile! My name is Seraphim, I'm an iOS Developer with 8+ years of experience. ✅ I'm making pixel-perfect apps with good code style and bugs-free. ✅ Full cycle of mobile app development - from idea to AppStore. ✅ Developed more than 20 iOS applications. ✅ Experienced with all Apple’s operating systems development: iOS, iPadOS, MacOS, WatchOS My experience includes most of the iOS Frameworks and technologies. My absolute favourites are SwiftUI and Combine. I'm a result-driven developer and a huge fan of my craft. Looking forward to your exciting projects of any complexity! Best regards, Seraphim

Maxim M.
$80/hr
  • Trophy Icon Swift
  • iOS Development
  • iOS SDK
  • Objective-C
  • UIKit
  • Cryptography
  • Firebase
  • JSON
  • Realm Database
  • Apple Core Location Framework
  • iPhone App Development
  • Smartphone
  • iOS
  • iPhone UI Design
  • Apple Xcode

Senior iOS Developer Fundamentals: Master Degree of Computer Science 10+ released projects 7+ years of iOS development experience 2+ years of Project Management experience (side, pet projects) Professional skills: - Highly proficient in object oriented methodologies, design patterns, data structures, algorithms, quality coding skills and excellent debugging skills; - Expert iOS platform mobile application development skills with a proven record of creating commercial quality software. Preference for Swift skills; - Debugging skills with proven experience in Xcode, Instruments and other performance analysis tools; - Strong experience and...

Sergey K.
$63/hr
  • Trophy Icon Swift
  • Android App Development
  • Java
  • Kotlin
  • Android
  • Android SDK
  • Android NDK
  • iOS
  • iOS Development
  • iPad App Development

For 9 years of working in mobile development, I helped more than 100 companies and individuals to grow, enhance, and maximize investments from their apps, include such apps like Fitbit, CamFind, Pure and others, you can find more examples in my portfolio. I had to work with projects at various stages of life. This experience helps me to review the current project process quickly, identify areas of need, and provide defined and strategic feedback to improve existing business processes to achieve project goals. Also, I provide service after the completion of the project. In my projects, I apply modern technologies which make the...

Augusto G.
$60/hr
  • Trophy Icon Swift
  • iOS Development
  • Objective-C
  • REST
  • JSON
  • tvOS
  • iOS
  • Kotlin
  • Mobile App Development
  • Android
  • RESTful Architecture

✅ Software Engineer ✅ Top Rated ✅ 100% job success ✅ 100% client recommendation ✅ 7000+ Upwork hours ✅ Fluent English Software engineer (2012). Developer for over 10 years with 7 years experience as an iOS mobile developer. My main goal is delivering top-quality in-time products and services, always being available to address client concerns. I have published several apps in App Store and Google Play which you can find in my portfolio. I have integrated all kinds of libraries and SDKs and converted apps from PSD, Sketch, Figma, Invision designs to functional apps with pixel-perfect user interfaces. Technical experience: (Current) - iOS...

Jovan S.
$30/hr
  • Trophy Icon Swift
  • Firebase
  • ARKit
  • AVKit
  • Core ML
  • Objective-C

Developing apps for iPhone and iPad that are beautiful in design and efficient in code is my primary objective. I have been working as an iOS developer for several years now, and I have experience with all of the iOS frameworks, as well as the third-party frameworks, using them to bring the app to life. Having started with the C++ objective-oriented language, Objective C, Swift and C as well have become the languages of my choice. Together with SQL, php, XML, JSON and other languages, data formats and design tools such as Adobe, all requirements come together to create an app that will be great in design, usability and user experience.

Anton R.
$50/hr
  • Trophy Icon Swift
  • iOS Development
  • REST
  • Unit Testing
  • SOAP
  • SceneKit
  • JSON
  • ACS Technologies Realm
  • Apple Xcode
  • iOS SDK

Hi Upworkers, I will help you to build your iOS app from scratch or help with some refactoring or feature improvement. My experience includes: - 5+ years of experience with iOS platform - experience in object-oriented software architecture, design and programming, design patterns - good understanding of the internals of iOS - testing of iOS applications including writing Unit tests - experience in Multithreading, Networking - excellent written and verbal communication skills - ability to perform in a fast-paced agile environment and work both as a tech lead, a team member, and independently Technical skills: **Programming languages:...

Oleh H.
$45/hr
  • Trophy Icon Swift
  • iOS Development
  • Objective-C
  • Apple Xcode
  • iPhone App Development
  • iPad App Development
  • Git
  • Bitbucket
  • Sketch
  • Jira

👋 Hello! I'm skilled iOS Developer with 6+ years of experience. I create high quality iOS apps and my main goal is customer satisfaction. Always focusing on quality and maintainability with the right project's architecture. 🔥 What u need to know about me: - Proficient with Swift and Objective-C - Feels great with creating applications from the scratch as well as maintance existing products - Practiced with fintech, social networks, chat, navigation, electronic workflows, video streaming applications - Used to work as a single developer and as part of the team; - The last, but not least - my services will save your money and time 💻...

Sukhaman S.
$55/hr
  • Trophy Icon Swift
  • iOS Development
  • Objective-C
  • iPhone App Development
  • Map Integration
  • Push Notifications
  • UIKit
  • Chat & Messaging Software

Results-oriented iOS developer with five years of experience. My vision for an application is developed keeping the user in mind, resulting in useable and intuitive user interface applications. I also understand the importance of creating highly readable and easily maintainable source code. Communication is key to the way that I develop software. Specializing in Mobile application testing,AWS, Firebase Database, MYSQL Database, API/REST, UI Testing, Product Requirements & more.

Tigran A.
$30/hr
  • Trophy Icon Swift
  • iOS Development
  • UIKit
  • Core Data
  • WebKit
  • Realm Database
  • ARKit
  • iPadOS
  • iOS
  • iPhone App Development
  • Firebase
  • StoreKit
  • Firebase Realtime Database

You need an iOS developer who is open-minded and dedicated to solve any problems? Then you found the right person. I am an iOS developer with 3 years of experience, I have worked with the most complex technologies in iOS such as AVFoundation, HLS Live Streaming, ARKit, Sprite Kit. I am extremely communicative, and I understand what exactly needs the business so I offer the best solutions for it. I am extremely communicative, always available for any type of calls, meetings, so be free to discuss with me your next successful project. ✅ UIKit, Swift ✅ In-app purchases ✅ Video Editing, AVFoundation, FFMpeg ✅ Realm ✅ Firebase integration ✅ Core...

Joseph M.
$100/hr
  • Trophy Icon Swift
  • iOS Development
  • Mobile App Development
  • Apple Xcode
  • iPhone App Development
  • iPad App Development
  • Mobile Programming
  • Project Management
  • Customer Service
  • Project Delivery
  • SpriteKit
  • GameKit
  • UIKit
  • In-App Purchases
  • Game Development

I am an independent iOS developer with a proven track record of starting new projects and taking them through development all the way to the app store. I enjoy taking on new challenges and solving complex programming tasks. - Top rated developer - Proficient in the Swift programming language - Bachelors in Engineering - Dedicated and self motivated to get projects done right and on time - Friendly, with good customer service skills

Ani K.
$40/hr
  • Trophy Icon Swift
  • Objective-C
  • Object-Oriented Programming
  • Design Pattern
  • Jira

Hello🖐 I'm an iOS developer with about 7 years of experience. During those years I have worked both in the creative and goal oriented startup companies, as well as in big outsourcing companies developing for well known and established international customers. I've worked with numerous apple and third-party frameworks in Objetive C and Swift (Alamofire, SwiftyJSON, SDWebImage, RxSwift, AFNetworking, AnimatedTextInput etc...). My experience and skills to share with you: ✅ iOS native app development using Objective-C and Swift ✅ iOS design concepts and guidelines ✅ RESTful, WebSockets (for real time communication) ✅ CoreData,...

Nathaniel Brion S.
$40/hr
  • Trophy Icon Swift
  • iOS
  • RxSwift
  • Firebase
  • Unit Testing
  • Git
  • Smartphone
  • Tablet
  • CloudKit
  • StoreKit
  • PushKit
  • Twilio API
  • In-App Purchases
  • Google Ads
  • Chat & Messaging Software

I'm an iOS Developer who cares about these things: (and you should too!) 👉 Customer Experience 👉 Integrity 👉 Purpose 👉 Result What do I offer: ✅ More than 5 years of relevant experience in iOS Development ✅ Experience in working for an app with 10M+ monthly active users ✅ Experience in creating an app from scratch and publishing it to the App Store. ✅ Exceptional debugging skills. Can-fix attitude whether it's a UI, Network, App Behavior, or even 3rd party SDK related bug. ✅ Resourcefulness (by prioritizing results, I can work with minimal instructions by utilizing the documentations and other ready-made materials on the internet) 💎...

Vedran O.
$40/hr
  • Trophy Icon Swift
  • iPhone App Development
  • iPad App Development
  • Objective-C
  • OpenCV
  • Computer Vision
  • Artificial Neural Network
  • Deep Learning
  • Artificial Intelligence
  • Machine Learning

I do my work with passion. So, I am experienced professional iOS developer with for over eight years as a freelancer. There are 20 years of software development behind me in general. On Upwork, I worked more than 2000 working hours billed in 75 projects best rated. Also, there are about 70+ projects on Freelancer.com in my recent freelancer history with overall score 5.0 and very high Repeat Hire Rate. Some of my past work includes: - Audio/Video editing applications - Working time tracking system - several board games My work can be described as: "Anything less than perfect is not an option." Here are some of apps that I did develop:...

Yurii S.
$90/hr
  • Trophy Icon Swift
  • iOS Development
  • API Development
  • Python
  • Django
  • Mobile App Development
  • Object-Oriented Programming
  • Redis
  • XMPP

I built custom software for variety of business and helped streamline their processes in order to save time and optimize operations. Whether it is a payment platform or messaging app, API integration or ETL process optimization I did it previously and will be happy to help you with your next project. I also develop mobile applications and reliable backend.

$NaN/hr

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How to Hire Top Swift Developers

How to hire Swift developers

A Swift developer will be integral at every phase, from wireframing the screens of your app and software planning through to user interface (UI) design, coding and integrations, testing, and submission to the App Store. If you have an existing Objective-C-based app, they’ll be the developer who can help migrate that app code into Swift 3 so that your app is as close to future-proof as possible. So how do you hire Swift developers? What follows are some tips for finding top Swift development consultants on Upwork.

How to shortlist Swift professionals

As you’re browsing available Swift development consultants, it can be helpful to develop a shortlist of the contractors you may want to interview. You can screen profiles on criteria such as:

  • Technology fit. You want a Swift developer who understands what you are trying to build.
  • Developer workflow. It’s always a plus if a developer is already familiar with in-house collaboration tools, test suites, development methodologies, and version control systems.
  • Feedback. Check reviews from past clients for glowing testimonials or red flags that can tell you what it’s like to work with a particular Swift developer.

How to write an effective Swift job post

With a clear picture of your ideal Swift developer in mind, it’s time to write that job post. Although you don’t need a full job description as you would when hiring an employee, aim to provide enough detail for a contractor to know if they’re the right fit for the project.

Job post title

Create a simple title that describes exactly what you’re looking for. The idea is to target the keywords that your ideal candidate is likely to type into a job search bar to find your project. Here are some sample Swift job post titles:

  • watchOS developer with Swift experience needed for a fitness app
  • iOS developer needed for a real-time video streaming app
  • Swift/Java expert needed for porting an Android app to Apple

Swift project description

After you get a better idea of your project deliverables, it’s time to write a project description. The title of your project description should be clear, informational, and attention-grabbing. It can include the type of development that you need so potential candidates can tell right off the bat if they’re a good fit. k? An effective Swift job post should include:

  • Scope of work: From getting accepted in the App Store to running unit tests, list all the deliverables you’ll need.
  • Project length: Your job post should indicate whether this is a smaller or larger project.
  • Background: If you prefer experience working with certain industries, software, or marketing channels, mention this here.
  • Budget: Set a budget and note your preference for hourly rates vs. fixed-price contracts.

Swift responsibilities

Here are some examples of Swift job responsibilities:

  • Plan and develop applications for your target Apple platform (e.g., iOS, macOS, watchOS)
  • Translate requirements and UI/UX designs into code
  • Build and maintain a Swift test suite (e.g., XCTest, SwiftCheck, Quick/Nimble)

Swift requirements and qualifications

Be sure to include any requirements and qualifications you’re looking for in a Swift developer. Here are some examples:

  • Proficiency in Swift
  • UI/UX design concepts
  • Apple app development ecosystem (e.g., Xcode, Cocoa)

Sample Project Description:

Title: Senior iOS Developer for long term project

Description: We’re looking for an experienced iOS developer who has worked in both Objective-C and Swift, ideally in mixed language projects. The project is a multifaceted app, with most features generally API-backed and using varying levels of offline persistence.  We have a long term roadmap that could mean an equally long term contract for the right developer.

You should have a strong track record in the design, development, and support of complex, maintainable and scalable mobile applications. You will have worked on projects involving their full development life-cycle.

Develop maintainable, clean and efficient code, and deliver products with customer-satisfied quality.

Required Technical Experience

  • 4+ years of iOS experience including UIKit, Autolayout, Interface Builder, etc.
  • Fundamental knowledge of Objective-C, including the Objective-C runtime.
  • Swift Generics: How to use them, limitations, etc.
  • iOS: Memory management and thread management.
  • Networking: Experience with using NSURLRequest or NSURLSession, or with AFNetworking, AlamoFire, etc.

Swift Developers FAQ

What is Swift?

Swift is the successor to Objective-C and the de facto programming language for building iOS, macOS, and other Apple apps. The language is both performant and easy to read and places an emphasis on helping programmers write safer code.

How much does it cost to hire a Swift developer?

The first step to determining the cost to hire a Swift developer will be to define your needs. Rates can vary due to many factors, including expertise and experience, location, and market conditions.

Cost factor #1: project scope

The first variable to consider when determining scope is the nature of the work that needs to be completed. Not all Swift development projects are created equally. Writing a simple business intelligence GUI for internal use will typically take less time than building an iOS app that can pass the Apple App Store’s stringent requirements.

Tip: The more accurately your job description describes the scope of your project, the easier it will be for talent to give you accurate cost estimates and proposals.

Cost factor #2: Swift development experience

Choosing the right level of expertise for the job is closely tied to how well you determined the scope of your project. You wouldn’t need advanced Swift programming skills to write a simple to-do list app. On the other hand, building a large enterprise app from scratch will likely require the skills of a senior Swift developer.

Beyond experience level, you need to consider the type of experience the talent possesses. The following table breaks down the rates of the typical types of Swift developers you can find on Upwork.

Rates charged by Swift developers on Upwork

Level of Experience Description Hourly Rate
Beginner Can build simple applications with Swift for iOS and/or macOS. Familiarity with Cocoa, Cocoa Touch, and/or Xcode. $30-50+
Intermediate Beyond fundamentals, specialized skills in developing for one or more Apple devices such as iPhone, iPad, Mac, Apple TV, and Apple Watch. $60-80+
Expert Mastery of the Swift software development lifecycle. Working knowledge across the entire technology stack. $80-100+

Cost factor #3: location

Location is another variable that can impact a Swift developer’s cost. It’s no secret that you can leverage differences in purchasing power between countries to gain savings on talent. But it’s also important to factor in hidden costs such as language barriers, time zones, and the logistics of managing a remote team. The real advantage to sourcing talent remotely on Upwork is the ability to scan a global talent pool for the best possible person for the job. Location is no longer an obstacle.

Cost factor #4: independent contractor vs. agency

The final variable regarding talent cost is hiring an independent contractor vs. an agency. An agency is often a “one size fits all” model, so you’ll often have access to a designer, a project manager, an engineer, and more. When hiring individuals you have total autonomy regarding who is responsible for which part of the project, but you’ll need to source each of those skills separately.

The trade-off between hiring individuals vs. hiring an agency is the level of administrative overhead you incur personally in coordinating tasks among all members of the team. Project scope and personal preference will determine which style is a better fit for your needs.

Common Swift developer mistakes

Fearing constants in Swift: DRY (don’t repeat yourself) has been drilled into us for decades, and for good reason. The versatility of a variable lets you do a lot without having to write duplicate code. That said, many coders tend to default to variables when they ought to be using constants instead.

The “let” keyword allows you to declare a constant, while the “var” keyword allows you to declare a variable. Swift promotes safer code by encouraging the use of constants wherever possible. If you find yourself declaring variables that never have to change, chances are good you’d be better off declaring constants instead with the “let” keyword. Being mindful of whether a declaration in your code should be a constant or a variable can lead to safer code, by ensuring something that fundamentally shouldn’t change remains immutable at runtime.

Not understanding when to use optionals: In Swift, everything from regular non-optional types (like Int, Bool, and String) to more-complex class types (like UIView) must have a value when we declare a variable. This avoids an entire class of runtime errors that could arise from an uninitialized variable. But what happens when you want to give a variable a value of “nil” at initialization time? Simply declaring something like “let x: Int = nil” would throw an error because of Swift’s inherent type safety, which correctly does not recognize “nil” as an “Int” type.

This is where optional types come into play: They let you change any type into an optional type by appending “?” to the end of it. If we modify our earlier example to “let x: Int? = nil”, we can print “nil” for the unassigned value of “x” until an actual value gets assigned.

Force unwrapping optionals in Swift: Swift is still relatively new to the app development landscape. When it launched, it did so with a host of features designed to give iOS developers greater flexibility without sacrificing the code safety. Unfortunately, one of those features, forced unwrapping, is often misunderstood and can be the reason an app crashes at runtime.

Consider the code block below:

class Car {

var tires : Tire?

}

class Tire {

var numTires = 4

}

let myCar = Car()

let tireCount = myCar.tires!.numTires

A runtime error will inevitably be thrown when “tireCount” force unwraps the “tires” property with an exclamation mark (!). The error will occur because the “tires” property is declared as an optional and has a default value of “nil” on initialization. This error can be fixed with optional chaining, by replacing the “!” with a question mark (?) and defining what should happen with each case:

if let tireCount = myCar.tires?.numTires {

print("this car has (tireCount) tire(s).")

} else {

print("unable to detect tires, check for flats before driving!")

}

The key thing to remember is that forced unwrapping should be used only when you are absolutely certain that an optional will never be “nil.” In all other cases, techniques like the optional chaining example above or checking for “nil” before unwrapping will lead to safer production code.

Tips and best practices

Use Playgrounds to test and prototype in real-time.

Playgrounds are interactive coding environments that provide live feedback for the output of your code. They provide a great way to prototype and share ideas without having to go through the trouble of setting up an actual Xcode project.

Use Swift enumerations to write intentional code.

If you ever find yourself in a situation where you need to declare types with finite sets of possible states and accompanying values, enums are the perfect tool for your needs. Moreover, because Swift enums are first-class types, they adopt many of the features one typically associates with classes, such as computed properties and instance methods. Combine that with Swift’s elegant syntax and type inference, and you have a tool that’s powerful enough to handle a wide range of practical applications, from error handling and status codes to UIKit identifiers and API endpoints.

Take advantage of method swizzling.

Those of you familiar with Objective-C will be happy to learn that you can still use this popular shortcut for swapping method implementations at runtime:

Swizzling in Swift is possible when:

  • You use the dynamic keyword, a declaration modifier that can be applied to a member of a class to tell the compiler that dynamic dispatch should be used at runtime.
  • You extend NSObject.
  • You use the @objc attribute to expose your code to the Objective-C runtime.

Keep in mind that even if you are working with a Class that has NSObject as a base class or are using the @objc attribute, you should still use the dynamic keyword to ensure that the Swift compiler doesn’t bypass the Objective-C runtime while optimizing your code.

The conventional way of using `initialize()` was actually deprecated in Swift 3 and is no longer permitted in later versions as it isn’t exposed anymore. A way to swizzle in these later versions is by defining a public static method in your class to run your swizzling and then calling that function at the beginning of your AppDelegate’s `didFinishLaunchingWithOptions`.

private var hasSwizzled = false

extension UIView {

final public class func swizzleStuff() {

guard !hasSwizzled else { return }

hasSwizzled = true

swizzle(self) /* This is pseudo – run your method here */

}

}

// ———————————————————————

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: UIApplicationLaunchOptionsKey: Any]?) -> Bool {

UIView.swizzleStuff()

// Run other code

}

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