Gergely Orosz, Software Developer in London, United Kingdom
Gergely Orosz

Software Developer in London, United Kingdom

Member since October 15, 2014
Gergely has over ten years of software development experience delivering mobile, web, and other client services. He is a pragmatic developer, passionate about building products people love, who thrives in small, agile teams. He enjoys challenging and interesting projects, having previously built top-rated iOS, Android, and Windows Phone apps, Skype for Xbox One, trading systems, and more. He currently leads iOS development at Skyscanner.
Gergely is now available for hire



London, United Kingdom



Preferred Environment

OS X, XCode, Terminal, Windows, Visual Studio

The most amazing... I've built is Cocktail Flow. It's one of the highest-rated food and drink apps on iOS, Android, and Windows Phone. Just search "cocktail" in the app store.


  • Principal iOS Developer

    2015 - PRESENT
    • Build the new iOS flagship Skyscanner app.
    • Put automated unit, integration, and end-to-end tests in place, eliminating the need for most manual testing.
    • Create and code a refreshingly beautiful UI, working with a tiny and part-time design team.
    Technologies: Objective-C, Swift, JavaScript, Ruby
  • Software Development Engineer

    2012 - 2015
    Skype (Microsoft)
    • Built Skype for Xbox One from the first line of code to launch day.
    • Rolled out Skype calls to all 400 million users, handling a server-side load of over 5,000 requests per second.
    • Built the next generation web calling and IM experience.
    • Led scrum teams as a certified scrum master on several projects.
    Technologies: JavaScript, HTML, C#, C++, Azure
  • Mobile Developer

    2010 - 2013
    Team Distinction
    • Built some of the top-rated Windows Phone apps like Cocktail Flow, Weather Flow, and AppFlow.
    • Ported Cocktail Flow to iOS.
    • Created AdRotator, an open source Windows Phone ad fill rate maximizer component.
    Technologies: iOS, Android, Windows Phone
  • Software Developer

    2011 - 2012
    J.P. Morgan
    • Built the front-end and back-end of an equities trading application.
    • Programmed a continuous integration pipeline using Jenkins.
    • Dramatically improved the perceived application performance by optimizing how and when the UI thread was accessed.
    Technologies: C#, Java, WPF, Jenkins
  • Software Developer

    2009 - 2011
    Scott Logic
    • Build Visiblox, a high performance, multi platform (WPF, Silverlight, Windows Phone), ridiculously extensible charting component. When released, this charting component was the most performant on the market for render speed.
    Technologies: C#, Java, WPF, Silverlight, Windows Phone
  • Software Developer

    2008 - 2009
    • Worked on various web development and software development projects.
    • Built the website for the National Bank of Hungary.
    • Scaled the voting web component for X Factor Hungary to handle over 1,000 requests per second during the final round of voting.
    • Created a data migration tool for the Financial Services Authority.
    Technologies: C#, JavaScript, Java, .NET, ASP.NET
  • Software Developer

    2004 - 2008
    Idea 2000, Ltd.
    • Hacked solutions using .NET, Java, PHP, C, Assembly and everything else I could get my hands on, delivering working results to clients.
    • Built the House of Future exhibition: Installed hardware to install lights, fridge and heating and wrote software to control these from a touch panel. Used Assembly, C and .NET for this solution.
    • Programmed a valuables tracking system using RFID, where I also wrote the Windows driver for the RFID kit.
    • Created websites for various organizations such as the International Student for Semmelweiss.
    Technologies: C#, Java, PHP, C, Assembly


  • Cocktail Flow (Development)

    I prototyped and built Cocktail Flow for Windows Phone. The app gained popularity unexpectedly quickly, within weeks of publication. Together with Distinction, I ported it to iOS and Android.

  • Weather Flow (Development)

    I prototyped the project and led product development with Distinction first to Windows Phone, then to Android, and finally to Windows 8. Weather Flow is a simple and beautiful app with first-class lockscreen and widget support. The app is paid for and ranks high among the paid weather apps on both platforms.

  • Skype for XBox One (Development)

    Worked on this product from the first line of code to launch day.

  • Skype Web Calling on (Development)

    Built and rolled out audio and video calls for all 400 million users. I worked on implementing the application (using Javascript) and building and scaling the back-end (built on Azure).

  • Visiblox High Performance Charts (Development)

    Developed Visiblox, a high performance, multi-platform (WPF, Silverlight, Windows Phone) and ridiculously extensible charting component.

  • Open Source Sharepoint Alternative (Development)

    Worked on Sense/Net, an open source sharepoint alternative solution.


  • Languages

    JavaScript, Objective-C, SQL, HTML, C#, Swift, Ruby
  • Frameworks

    .NET, Cocoa, AngularJS, Knockout.js
  • Paradigms

    SOLID Principles, Agile Software Development, Test-driven Development (TDD), Scrum, Kanban, Pair Programming
  • Platforms

    iOS, Windows Phone, Azure, Parse, Google App Engine, Android
  • Libraries/APIs

  • Tools

    Git, Grunt, Jenkins, TFS
  • Storage

    Azure Tables, NoSQL, Azure Blobs, MySQL, MongoDB


  • Master's degree in Computer Science
    2003 - 2009
    Budapest University of Technology and Economics - Budapest, Hungary
  • Bachelor of Science (Exchange Program) degree in Computer Science
    2007 - 2007
    University of New Hampshire - New Hampshire, USA

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