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IOS Developer Resume

Most mobile engineering resumes fail because they focus on features rather than performance and architecture. This format highlights your expertise in Swift concurrency, memory management, and modularizing large-scale iOS apps.

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Christopher Zhao

christopher.zhao@gmail.com • +1 (474) 942-4170 • github.com/christopherz • linkedin.com/in/christopher-zhao

Education

MIT May 2018
Bachelor of Science in Computer Science GPA: 3.88/4.0

Technical Skills

Languages: Swift, Objective-C, C++, Ruby, Python, SQL
Frameworks: SwiftUI, UIKit, Combine, Core Data, XCTest, Core Animation
Tools: Xcode, Bazel, Bitrise, Charles Proxy, Instruments, Git

Professional Experience

Senior iOS Engineer June 2021 – Present
Stripe San Francisco, CA
  • Architected a modularized networking layer for the Stripe Dashboard app using Swift Concurrency, reducing average network latency by 140ms and eliminating 95% of data-race-related crashes.
  • Optimized the app's binary size by 22% (15MB) by automating the removal of unused assets and refactoring legacy Objective-C dependencies into lightweight Swift modules.
  • Led the migration of the core payments flow from UIKit to SwiftUI, improving developer velocity by 30% while maintaining a 99.98% crash-free session rate across 2M+ monthly active users.
iOS Engineer July 2018 – May 2021
Lyft San Francisco, CA
  • Engineered a real-time map rendering engine for the Lyft passenger app, utilizing Core Animation and custom tiling logic to maintain a consistent 60 FPS during high-density ride requests.
  • Implemented a comprehensive XCTest suite and integrated it into the Bitrise CI/CD pipeline, increasing code coverage from 45% to 82% and reducing regression bugs found in production by 40%.

Projects

SwiftPerf Profiler Swift, Instruments, Shell
  • Built an open-source command-line tool that parses Xcode Instruments traces to identify expensive main-thread operations, currently used by 500+ developers on GitHub.
✓ ATS-Optimized

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Write Bullets That Prove You Can Ship Production Code

Transition from listing simple features to describing how you solved complex architectural problems and improved the mobile user experience.

❌ Vague/Generic

Responsible for making the app faster and fixing bugs.

✓ Impact-Focused

Reduced app launch time by 35% (400ms) by deferred initialization of non-critical SDKs and optimizing the dynamic linker (dyld) loading process.

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Why it works: It identifies the specific technical bottleneck (launch time/SDK initialization) and provides a quantified result that matters to the user.

❌ Task-Focused

Developed new screens using SwiftUI and Combine.

✓ Results-Driven

Rebuilt the user onboarding flow using SwiftUI and a State-Driven architecture, resulting in a 12% increase in successful user registrations.

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Why it works: It connects the choice of framework to a specific business outcome—user registration—proving the engineer understands product impact.

❌ No Metrics

Improved the testing process for the iOS team.

✓ Quantified Achievement

Reduced CI build times from 25 minutes to 12 minutes by implementing Bazel for incremental builds and parallelizing the test suite.

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Why it works: Engineering managers care about developer productivity. Cutting build times in half is a massive, measurable win for the whole team.

❌ Passive Voice

Was involved in the transition from Objective-C to Swift.

✓ Action-Oriented

Refactored 40,000 lines of legacy Objective-C into modern Swift, adopting the Result type and Guard statements to improve code safety and readability.

Copied!

Why it works: It shows leadership and technical ownership. 'Refactored' is a much stronger verb than 'was involved in'.

Mobile Engineering Career Advice

Practical answers to common questions about building a standout iOS engineering profile.

Do I still need Objective-C on my resume in 2024?

Yes, especially for roles at established companies like Uber, Airbnb, or Meta. Most large apps still have legacy C++ or Objective-C layers. Showing you can navigate interop and bridge the two languages is a significant advantage over developers who only know Swift.

How should I highlight my knowledge of iOS architecture?

Avoid just listing 'MVVM' or 'VIPER' in a skills list. Instead, describe how you applied an architecture to solve a problem—for example, 'Implemented a Coordinator pattern to decouple navigation logic from View Controllers, reducing file size by 40%.'

What metrics do mobile hiring managers actually care about?

Focus on app health and performance: crash-free rates, app startup time (TTI), binary size, memory usage, and frame rates. Business metrics like conversion rates or user retention are also valuable if you can link them to your technical changes.

Is a portfolio of apps more important than a resume?

For junior roles, a portfolio proves you can ship. For senior roles, the resume is more critical. It needs to show you understand the 'why' behind technical decisions and can work within a large-scale engineering organization with complex CI/CD and testing requirements.

What are common red flags on an iOS developer resume?

Vague claims like 'expert in SwiftUI' without mentioning state management (StateObject, ObservedObject) or performance profiling. Another red flag is ignoring the testing aspect—if your resume doesn't mention XCTest or UI testing, it suggests you might not be ready for production-grade codebases.

How do I show I'm up to date with Apple's latest changes?

Mention specific, recent technologies like Swift Concurrency (async/await), Widgets, or App Intents in your project descriptions. This shows you're proactive about adopting modern APIs that improve the user experience.

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IOS Developer Resume LaTeX Code

Copy and paste into Overleaf or your LaTeX editor 

%-------------------------
% IOS Developer Resume
% LaTeX Resume Template - Jake's Resume Format
%-------------------------

\documentclass[letterpaper,11pt]{article}

\usepackage{latexsym}
\usepackage[empty]{fullpage}
\usepackage{titlesec}
\usepackage{marvosym}
\usepackage[usenames,dvipsnames]{color}
\usepackage{verbatim}
\usepackage{enumitem}
\usepackage[hidelinks]{hyperref}
\usepackage{fancyhdr}
\usepackage[english]{babel}
\usepackage{tabularx}

\pagestyle{fancy}
\fancyhf{}
\fancyfoot{}
\renewcommand{\headrulewidth}{0pt}
\renewcommand{\footrulewidth}{0pt}

% Adjust margins
\addtolength{\oddsidemargin}{-0.5in}
\addtolength{\evensidemargin}{-0.5in}
\addtolength{\textwidth}{1in}
\addtolength{\topmargin}{-.5in}
\addtolength{\textheight}{1.0in}

\urlstyle{same}

\raggedbottom
\raggedright
\setlength{\tabcolsep}{0in}

% Sections formatting
\titleformat{\section}{
  \vspace{-4pt}\scshape\raggedright\large
}{}{0em}{}[\color{black}\titlerule \vspace{-5pt}]

%-------------------------
% Custom commands
\newcommand{\resumeItem}[1]{
  \item\small{
    {#1 \vspace{-2pt}}
  }
}

\newcommand{\resumeSubheading}[4]{
  \vspace{-2pt}\item
    \begin{tabular*}{0.97\textwidth}[t]{l@{\extracolsep{\fill}}r}
      \textbf{#1} & #2 \\
      \textit{\small#3} & \textit{\small #4} \\
    \end{tabular*}\vspace{-7pt}
}

\newcommand{\resumeProjectHeading}[2]{
    \item
    \begin{tabular*}{0.97\textwidth}{l@{\extracolsep{\fill}}r}
      \small#1 & #2 \\
    \end{tabular*}\vspace{-7pt}
}

\newcommand{\resumeSubItem}[1]{\resumeItem{#1}\vspace{-4pt}}

\renewcommand\labelitemii{$\vcenter{\hbox{\tiny$\bullet$}}$}

\newcommand{\resumeSubHeadingListStart}{\begin{itemize}[leftmargin=0.15in, label={}]}
\newcommand{\resumeSubHeadingListEnd}{\end{itemize}}
\newcommand{\resumeItemListStart}{\begin{itemize}}
\newcommand{\resumeItemListEnd}{\end{itemize}\vspace{-5pt}}

%-------------------------------------------
%%%%%%  RESUME STARTS HERE  %%%%%%%%%%%%%%%%%%%%%%%%%%%%

\begin{document}

%----------HEADING----------
\begin{center}
    \textbf{\Huge \scshape Christopher Zhao} \\ \vspace{1pt}
    \small christopher.zhao@gmail.com $|$ +1 (474) 942-4170 $|$ github.com/christopherz $|$ linkedin.com/in/christopher-zhao
\end{center}

%-----------EDUCATION-----------
\section{Education}
  \resumeSubHeadingListStart
    \resumeSubheading
      {MIT}{Location}
      {Bachelor of Science in Computer Science}{May 2018}
  \resumeSubHeadingListEnd

%-----------SKILLS-----------
\section{Technical Skills}
 \begin{itemize}[leftmargin=0.15in, label={}]
    \small{\item{
     \textbf{Languages}{: Swift, Objective-C, C++, Ruby, Python, SQL} \\
     \textbf{Frameworks}{: SwiftUI, UIKit, Combine, Core Data, XCTest, Core Animation} \\
     \textbf{Tools}{: Xcode, Bazel, Bitrise, Charles Proxy, Instruments, Git}
    }}
 \end{itemize}

%-----------EXPERIENCE-----------
\section{Professional Experience}
  \resumeSubHeadingListStart
    \resumeSubheading
      {Senior iOS Engineer}{June 2021 – Present}
      {Stripe}{San Francisco, CA}
      \resumeItemListStart
        \resumeItem{Architected a modularized networking layer for the Stripe Dashboard app using Swift Concurrency, reducing average network latency by 140ms and eliminating 95\% of data-race-related crashes.}
        \resumeItem{Optimized the app's binary size by 22\% (15MB) by automating the removal of unused assets and refactoring legacy Objective-C dependencies into lightweight Swift modules.}
        \resumeItem{Led the migration of the core payments flow from UIKit to SwiftUI, improving developer velocity by 30\% while maintaining a 99.98\% crash-free session rate across 2M+ monthly active users.}
      \resumeItemListEnd

    \resumeSubheading
      {iOS Engineer}{July 2018 – May 2021}
      {Lyft}{San Francisco, CA}
      \resumeItemListStart
        \resumeItem{Engineered a real-time map rendering engine for the Lyft passenger app, utilizing Core Animation and custom tiling logic to maintain a consistent 60 FPS during high-density ride requests.}
        \resumeItem{Implemented a comprehensive XCTest suite and integrated it into the Bitrise CI/CD pipeline, increasing code coverage from 45\% to 82\% and reducing regression bugs found in production by 40\%.}
      \resumeItemListEnd
  \resumeSubHeadingListEnd

%-----------PROJECTS-----------
\section{Projects}
    \resumeSubHeadingListStart
      \resumeProjectHeading
          {\textbf{SwiftPerf Profiler} $|$ \emph{Swift, Instruments, Shell}}{}
          \resumeItemListStart
            \resumeItem{Built an open-source command-line tool that parses Xcode Instruments traces to identify expensive main-thread operations, currently used by 500+ developers on GitHub.}
          \resumeItemListEnd
    \resumeSubHeadingListEnd

%-------------------------------------------
\end{document}

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</> SWE Resume

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