Patrik Vaberer, iOS Developer in Bratislava, Bratislava Region, Slovakia
Patrik Vaberer

iOS Developer in Bratislava, Bratislava Region, Slovakia

Member since March 31, 2016
Patrik is a freelance iOS developer and entrepreneur with extensive experience in startups. His latest projects have been top-notch apps for US startups and Johnson & Johnson, done in Swift. Patrik delivers top quality, pays attention to details, and is the type of person who gets things done.
Patrik is now available for hire




Bratislava, Bratislava Region, Slovakia



Preferred Environment

Git, Xcode, iOS, MacOS, Charles Proxy

The most amazing...

...project I've launched is Grideo, an app for creating social templates featured by Apple as "App of the Day" in 165 countries, listed in the best apps in April.


  • Software Engineer

    2016 - PRESENT
    Johnson & Johnson
    • Worked on an iOS app with the team of six engineers.
    • Created tests to ensure quality.
    • Used Atlassian software kit to get things done.
    • Operated within Scrum methodology.
    • Communicated with multiple departments.
    • Testimonial: "It has been my pleasure to work with Patrik for the past few months. He is a high performing team member that never disappoints. He is always eager to go above and beyond requirements to create a better user experience. Patrik is not afraid to share his great ideas or tackle any feature small or large. On top of his technical skills, Patrik's mentorship abilities have been essential in order to bring all new team members up to speed. Without Patrik our product would not be what it is today." – Diego Urquiza, via LinkedIn.
    Technologies: CocoaPods, Alamofire, SonarQube, Core Data, Swift
  • iOS Engineer

    2016 - PRESENT
    Toptal Client
    • Developed a full project.
    • Provided technical advisory.
    • Implemented KPIs.
    Technologies: Core Animation, Azure, Parse, Swift, iOS
  • iOS Engineer

    2017 - 2017
    • Communicated with multiple departments.
    • Worked on an iOS app with the team of three iOS engineers.
    • Used the Atlassian software kit to get things done.
    • Operated within Scrum methodology.
    • Worked with New Relic for bug tracking.
    • Used Charles to debug RESTful APIs.
    • Worked extensively with push notifications and to increase engagement.
    • Implemented custom syncing mechanism.
    • Testimonial: "Patrik is a very talented developer which I had the privilege of working with at BabyCenter. He is a resourceful and insightful professional, who takes the time to understand the requirements to assure his code will follow standards and will be maintainable in the future. He started adding value to our application almost immediately, and, despite working remotely, we had great communication. Patrik was a great addition to the BabyCenter team, and is a great asset to any team he works with." – Alex Leite, via LinkedIn.
    Technologies: Realm, Objective-C, Swift
  • iOS Engineer

    2016 - 2017
    Reacha, LLC
    • Helped the client to build the MVP.
    • Led and designed the IT architecture to the successful release to the App Store.
    • Integrated Facebook, Instagram, Twitter, and LinkedIn API.
    • Leveraged and worked with push notifications.
    • Integrated Parse and Layer to build a native chat into the app.
    • Worked with Crashlytics for bug tracking.
    • Implemented extensive analytics to ensure measuring right KPIs using Mixpanel.
    • Testimonial: "I've been working with Patrik to create a new live business App called REACHA. We hired Patrik as lead iOS developer and he continues to work with us on many levels, managing the build and rollout of this groundbreaking business networking App. He also manages back-end resources very well and successfully works with our product and UX design team seamlessly with great attention to detail. I've worked with many developers over the last 10 years. Patrik is definitely top of my list and I look forward to working with him for many more years to come." – Grant Lyons, via LinkedIn.
    Technologies: Azure, Parse, Core, Swift
  • iOS Engineer

    2015 - 2016
    • Developed the full project in Swift.
    • Oversaw the whole app development cycle, including maintenance, bug fixing, and performance testing.
    • Collaborated with other departments to define and create specifications.
    • Led the development using Scrum methodology.
    Technologies: AFNetworking, REST APIs, Core Data, Swift
  • iOS Engineer

    2013 - 2014
    • Developed the full project in Objective-C.
    • Implemented a fully functional iOS app from top to bottom, meeting the client's requirements.
    • Successfully released the final version to the App Store.
    Technologies: Google Maps, AFNetworking, REST APIs, Core Data, Objective-C


  • Velys

    A Swift based app to connect patients with doctors to help with a knee surgery. I joined the team to set up the project, architecture, create MVP and onboard 4 other iOS developers to continue supporting the app.

  • Grideo

    Grideo is an iOS app for creating social media templates. Its unique editor allows creating beautiful posts by adding photos, text stickers, and adjusting the final image by many variations. The app was featured by Apple.

  • BabyCenter

    With millions of users, the app is ranked number one in the pregnancy category in the App Store and is constantly featured by Apple. I was responsible for creating new features (new modules) and fixing bugs.

  • Care4Today

    Care4Today® Connect is a medication management app with the input of patients and healthcare professionals (HCPs) to give you a comprehensive health and wellness info that goes beyond medication reminders.

  • Reacha | Business Network App

    Reacha is an on-demand business network where people create live business cards to promote what they do to attract new customers.

  • Ripple

    Posting and discovering global stories that matter but go unnoticed. A simple way to post a story or article and share it with others.

  • Wiretap

    The app makes favorite shows re-watchable by sharing the cast and crew’s thoughts about that episode with a user that appear time-synced with the playback of any particular episode.

  • Font Awesome Swift

    A Font Awesome Swift library for iOS. No more image icons anymore. Using this library is very easy; it has more than 500 stars.

  • Swift Best Practices and Tips by Toptal Developers (Publication)
    This resource contains a collection of Swift best practices and Swift tips provided by our Toptal network members.


  • Languages

    Swift, Objective-C, JavaScript
  • Frameworks

    Core Data, Cocoa Touch, AFNetworking, iOS SDK
  • Libraries/APIs

    Twitter API, Google API, Facebook API, Stripe, Core Animation, REST APIs, Google Maps, Alamofire, CocoaPods, Node.js
  • Tools

    Xcode, TestFlight, Sketch 3, Jenkins, Git, SonarQube, Charles Proxy
  • Paradigms

    Agile Software Development, Scrum, REST
  • Platforms

    iOS, Heroku, Firebase, MacOS, Parse, Azure
  • Other

    BrainTree, Core, Apps
  • Storage

    MySQL, Realm


  • Bachelor's Degree in Computer Science
    2012 - 2015
    Comenius University Faculty of Mathematics, Physics, and Informatics - Bratislava, Slovakia

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