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Matthew Knippen, Objective-C Developer in Chicago, IL, United States
Matthew Knippen

Objective-C Developer in Chicago, IL, United States

Member since October 9, 2013
Matthew has been building iPhone and iPad applications since the release of the iPhone SDK in 2008, working on over 30+ applications in his career. He holds a Bachelor's degree in Computer Science from the Illinois Institute of Technology.
Matthew is now available for hire



  • Git, 13 years
  • Cocoa Touch, 10 years
  • Xcode, 10 years
  • Objective-C, 10 years
  • iOS, 10 years
  • Facebook iOS SDK, 8 years
  • AV Foundation, 4 years
  • Swift, 4 years
Chicago, IL, United States



Preferred Environment

Xcode, Git, GitHub, Zsh, Mac OS X, TextMate

The most amazing...

...application I've built this month is NoBlink, an app that detects when you are blinking and fixes your pictures.


  • President, Lead iOS Developer

    2009 - PRESENT
    Zwiffer Inc.
    • Built 5 different personal applications currently live in the App Store, all with 4-5 star review averages.
    • Built Diode, an award-winning game for the iPad.
    • Worked with various small businesses performing server setup, custom application development, and dedicated support.
    • Used advanced CoreImage features including face detection, to detect when a user is blinking in a photo for the application NoBlink.
    • Served as a consultant for app improvement for companies such as Victoria's Secret and Bath & Body Works.
    Technologies: Swift, Objective-C, PHP, HTML5, CSS3, JavaScript
  • Senior iOS Developer, Product Manager

    2012 - 2013
    Deck5 Software Inc.
    • Developed iOS applications for various Fortune 500 corporations and personal R&D projects.
    • Built a team of excellent people to work with, including developers, designers, project managers, and interns.
    • Used new business and marketing techniques to make iOS applications successful in the App Store.
    • Developed product management skills and learned what it takes to make a tech product successful.
    • Created the Forte by Korn/Ferry Product, allowing users to become better employees in many Fortune 500 organizations.
    • Built the Application DECKFOLIO, the go-to app for learning stocks and options on the iPad.
    Technologies: Objective-C, Ruby on Rails, JavaScript
  • Senior iOS Developer

    2012 - 2012
    Designory Inc
    • Built an application for Infiniti cars that is used in retail stores today.
    Technologies: Objective-C, SQL
  • Systems Engineer

    2010 - 2012
    Lextech Global Services
    • Developed nearly 20 different applications for various high-profile companies.
    • Built a custom drag-and-drop inventory search product for Sonic Automotive. This application had to search 25k cars instantly using Core Data.
    • Used UIGestureRecognizers to build a 3D viewing model by splitting the object into pictures. This allowed the original iPad to render in full quality, without losing performance.
    • Used Infinite Peripherals Hardware to build two different applications involving barcode signing, and credit card transactions. Lightning Sale won an award at iOSDevCamp in 2010.
    • Worked in small teams to accomplish large goals.
    • Learned how to structure time to meet tight deadlines for clients.
    Technologies: Objective-C, C, Java, JavaScript
  • Mac Specialist

    2008 - 2010
    Apple Inc.
    • Learned how to position the perfect selling points of a Mac Computer, iPod and iPhone and the ideal way to position someone in buying a computer with accessories.
    • Had several weeks with the most sales in the store.
    • Became very good at suggesting additional products based on the customer’s needs.
    • Learned strong customer interaction and how to address the needs of the customer.
    • Asked to help lead training for every new Apple employee in the entire region.
    Technologies: English


  • My Interactive Application Portfolio (Other amazing things)

    TapFame holds all of the applications I have built that are currently on the App Store, allowing you to see screenshots, technologies used, reviews and more.

  • NoBlink - Always Take the Perfect Photo! (Development)

    NoBlink allows you to always take the perfect photo without a single person blinking in it! Ranked in the Top 10 Photo & Video applications in 4 countries.

  • DECKFOLIO - Options Education Made Simple (Development)

    Investing can be a challenging endeavor even for professionals. So retail investors need every advantage they can get. Deckfolio was created for both experienced and aspiring investors to help increase their investing skills and returns through the use of Options. Many investors fail to recognize the power that Options can provide for both portfolio risk reduction and leverage; so they're missing out. But their reticence is frequently due to their misperception of Options, along with innate Options complexity. Deckfolio leverages the communications and social graph capabilities of Twitter with innovative graphical analysis features into a simple and engaging Options education experience. Download it and give it a try!

  • Korn/Ferry Forte (Development)

    Forte is an innovative application from Korn/Ferry International that provides an engaging personal development platform for employees.

  • Sonic Automotive - Auto Search (Development)

    Auto Search from Sonic Automotive guides you through an easy, yet comprehensive, search process to connect you to the vehicle and dealer that is the best fit for your needs. Best of all, you can access the Sonic inventory website’s most popular features on-the-go!

  • The Pampered Chef (Development)

    Pampered Chef® Consultants, this is your official app!

    Stay on top of your business anytime, anywhere. Quickly manage your contacts and calendar, set up Shows, enter orders, and submit Shows. It all syncs automatically to your data on Consultant's Corner*, so you're always up-to-date! Plus, you can view current and upcoming Host & Guest Specials and browse all of our products. You truly can do business wherever you are!

  • Diode - Award Winning Game (Development)

    Diode is an addictive, race-against the clock arcade game that matches precision with crazy-fast speed. Diode was voted Best Game at iOSDevCamp in 2010. See a video of Diode in action:


  • Languages

    Swift, Objective-C, CSS3, Ruby, HTML5, C, SQL, Java, Haskell, JavaScript
  • Frameworks

    AV Foundation, Core Data, MapKit, Cocoa Touch, ImageIO, GameKit, EventKit, Core Foundation, Address Book, AFNetworking, Core Location, CFNetwork, StoreKit, Core Motion, Ruby on Rails (RoR), AudioToolbox, Core Bluetooth
  • Libraries/APIs

    Flurry, Facebook iOS SDK, iRate, Twitter API, Core Image, Facebook API, PlayHaven, Core Animation, Core Graphics, SAX, SpriteKit
  • Tools

    Apple Keynote, Git, Xcode, Crashlytics, RevMob, VirtualBox, GitHub, GitHub Pages, TextMate, Subversion (SVN), Adobe Photoshop, Coda 2, Charles, Adobe Illustrator
  • Paradigms

    Model View Controller (MVC), Continuous Integration (CI), Object-oriented Programming (OOP), Agile Software Development, Concurrent Programming, Class-based OOP, Refactoring, Rapid Prototyping, UX Design, Unit Testing, Scrum, REST, Key-Value Observing (KVO), Pair Programming, Extreme Programming, Test-driven Development (TDD)
  • Platforms

    iAd, MacOS, Parse, Keychain, iOS, iCloud, Heroku, Amazon Web Services (AWS), Arduino
  • Storage

    JSON, SQLite, MongoDB, AWS S3, NoSQL, PostgreSQL, MySQL
  • Other

    UI Kit, Accounts, Multithreading, Lean Development, Game Design, Sales, Security, Product Management, Computer Graphics, Product Development, User Interface (UI)


  • Bachelors degree in Computer Science
    2008 - 2012
    Illinois Institute of Technology - Chicago, IL
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