The Vital Guide to iOS Interviewing

True iOS expertise extends far beyond coding knowledge. Highly experienced iOS developers will have a thorough understanding of the iOS platform, its idiosyncrasies, and the relative merits and pitfalls of the various implementation options available. This guide offers a sampling of effective questions to help evaluate the breadth and depth of a candidate's mastery of the iOS platform.

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Read a list of great community-driven iOS interview questions.

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Brian HammondUnited States
Brian has over 15 years of experience as a full-stack developer, including creating a #1 iOS game in 2008 and scaling Yahoo! ad servers. Brian's strengths are adaptability, clear communication, and a relentless focus on the details that get projects shipped.
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iOSObjective-CCiOS SDKParse iOS SDKiOS SimulatorXcodeApple XcodeiOS 7MacMac OS XMac OSMobile Web
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Rinat SharipovRussia
Rinat is a Senior iOS Engineer with over six years of software development experience, during which he has worked with REST-based APIs, social media integration, geolocation, Core Animation, and full control customization.
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Victor Vicente de CarvalhoBrazil
Victor is a polyglot freelance software engineer who has worked full-stack, ranging from interaction with OS internals to persistent, scalable, fault-tolerant servers and mobile front-ends as well. He has strong knowledge of architectural concepts, and he has strong experience working as technical leader.
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iOSC++
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Teng Siong OngUnited States
Teng Siong is a freelance developer and entrepreneur who has helped build applications with millions of users. He started a company after his freshman year, which was later acquired. He has extensive experience working with early stage startups and helping them to build quick prototypes for market validation.
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iOSRubyRuby on RailsFacebook API
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Ted CohnUnited States
Ted is a senior architect, technologist, freelance developer, and entrepreneur with broad and deep experience developing award-winning products. He excels at working with small teams, as a team leader or alone. He is a high impact programmer with great communication skills, who pays great attention to detail.
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iOSC#RubyObjective-CCJavaHTML5SQLJavaScriptAndroid APISQLiteJava CollectionsjQuery
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Stefan ProgovacUnited States
Stefan is a highly skilled iOS developer with a master's degree in physics. He loves both technological and artistic sides of software engineering. He has had the pleasure to work on some popular enterprise-level apps used by millions of people for companies like Target, Best Buy, and Coca-Cola. He believes that app development is truly an art.
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iOSSwiftObjective-CCocoaPodsParse iOS SDKGoogle APIGitHubGitXcodeAgile Software DevelopmentApple Push NotificationsOAuthOAuth2
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Igor OstrizCroatia
Igor is a lead iOS developer with several years of experience programming fault-tolerant systems ranging from working with telecoms to building systems that monitor radioactive emissions. He has worked with a broad range of technologies and also took lead roles as an architect.
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iOSC++Objective-CCC#CocoaWindows
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Tiago SilvaPortugal
Tiago left his position at Microsoft to co-found Hive. From then on, building up Hive has led him through working on projects in every kind of language and environment, performing every skill imaginable from sales, to project management and hardcore development. For him, programming is an art form, and he gets a kick out of making his code as elegant as possible.
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Ken WhaleyRussia
Ken is a top architect, engineer, and developer with over 30 years of experience in the field. He has a proven ability to understand, optimize, enhance, and create from scratch significant software tools and workflows with large user bases that greatly magnify productivity for large groups of engineers. Ken is eager to take on new challenges and has done so with teams of all sizes and compositions.
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Joshua BallancoUnited States
Joshua is an architect, engineer, and scientist with experience building large-scale systems dealing with everything from massive amounts of video data to heavy web traffic to integration with a wide array of components in an SOA infrastructure. He's worked for Apple and AOL, and also led a group of 20+ consultants.
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An iOS developer is responsible for developing applications for mobile devices powered by Apple’s iOS operating system. Ideally, a good iOS developer is proficient with one of the two programming languages for this platform: Objective-C or Swift. If you are looking for a Swift developer specifically, please refer to our Swift Developer Job Description Template. iOS developers must also have a strong understanding of the patterns and practices that revolve around the iOS platform.

Writing a good job description and advertisement for an iOS developer requires an emphasis to be placed on the specific technologies necessary for the project. When you are looking for an advanced iOS developer to fill a specific niche, posting a generic iOS developer description in your job ad will bring numerous applications from people who are unfamiliar with the required technologies or have very limited knowledge of the platform as a whole.

This article will provide you with a sample iOS developer job description that will help you write a perfect job ad, and assure that you easily find and hire the person that matches your specific criteria.

iOS Developer - Job Description and Ad Template

Company Introduction

{{Write a short and catchy paragraph about your company. Make sure to provide information about the company’s culture, perks, and benefits. Mention office hours, remote working possibilities, and everything else you think of that makes your company interesting.}}

Job Description

We are looking for an iOS developer responsible for the development and maintenance of applications aimed at a range of iOS devices including mobile phones and tablet computers. Your primary focus will be development of iOS applications and their integration with back-end services. You will be working alongside other engineers and developers working on different layers of the infrastructure. Therefore, a commitment to collaborative problem solving, sophisticated design, and the creation of quality products is essential.

Responsibilities

  • Design and build applications for the iOS platform
  • Ensure the performance, quality, and responsiveness of applications
  • Collaborate with a team to define, design, and ship new features
  • Identify and correct bottlenecks and fix bugs
  • Help maintain code quality, organization, and automatization
  • {{Add other responsibilities here that are relevant}}

Skills

  • Proficient with Objective-C or Swift {{depending on project requirements}}, and Cocoa Touch
  • Experience with iOS frameworks such as Core Data, Core Animation, etc.
  • Experience with offline storage, threading, and performance tuning
  • Familiarity with RESTful APIs to connect iOS applications to back-end services
  • Knowledge of other web technologies and UI/UX standards
  • Understanding of Apple’s design principles and interface guidelines
  • Knowledge of low-level C-based libraries is preferred
  • Experience with performance and memory tuning with tools {{such as Instruments and Shark, depending on project needs}}
  • Familiarity with cloud message APIs and push notifications
  • Knack for benchmarking and optimization
  • Proficient understanding of code versioning tools {{such as Git, Mercurial or SVN}}
  • Familiarity with continuous integration
  • {{Make sure to mention any frameworks, libraries, or any other technology relevant to your project}}
  • {{List education level or certification you require}}
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