Nicolas Milcoff, Technical Leadership Developer in Rosario, Santa Fe Province, Argentina
Nicolas Milcoff

Technical Leadership Developer in Rosario, Santa Fe Province, Argentina

Member since May 21, 2017
Nico is a mobile development expert, trainer, and international speaker. He is also a Microsoft MVP who actively contributes to/maintains open-source projects in the mobile space, like MvvmCross—he loves to push forward the technologies he works with. Nico is a team worker and feels motivated with all opportunities to share goals and interests with other people.
Nicolas is now available for hire


    Mobile App Development, Team Leadership, Redux, TypeScript...
  • Xablu BV
    Mobile App Development, Visual Studio Code, Mobile Architecture, React Native...
  • MvvmCross
    Mobile App Development, Android, iOS, Git, C#, Xamarin.Forms, Xamarin...



Rosario, Santa Fe Province, Argentina



Preferred Environment

TypeScript, Android, iOS, React Native, GitHub, Git, SourceTree, Android Studio, Xcode, Visual Studio Code

The most amazing...

...code I've written is part of an OSS framework I maintain, and it is used in thousands of mobile apps around the world.


  • CTO

    2019 - PRESENT
    • Created an open-source library to easily consume REST and GraphQL APIs in C#.
    • Rearchitected two different mobile apps, which led to improved performance, increased developer productivity, and shorter time to market.
    • Created a unit testing infrastructure that is currently used in multiple production projects.
    • Oversaw and led multiple development teams in a remote-first setup.
    • Provided technical guidance to external customers and internal company projects.
    • Delivered more than ten technical talks at different meetups around the world.
    Technologies: Mobile App Development, Team Leadership, Redux, TypeScript, Visual Studio Code, Android, iOS, Git, C#, Xamarin.Forms, Xamarin, Android SDK, Visual Studio, Mobile Architecture, Java, Swift, Solidity, .NET Core, React Native
  • Mobile Development Trainer

    2018 - PRESENT
    Xablu BV
    • Facilitated on-site training about Xamarin development in New York (US), Mechelen (Belgium), and Almelo (The Netherlands).
    • Crafted and delivered a strategy training on mobile apps development, which compares React Native, Flutter, and Xamarin.
    • Trained and coached app development teams from companies such as UPS, Philips, and KPN.
    • Led virtual training on mobile development for a team in the Netherlands.
    Technologies: Mobile App Development, Visual Studio Code, Mobile Architecture, React Native, Git, Xamarin.Forms, Xamarin, Visual Studio, iOS, Android
  • Core Project Maintainer

    2017 - PRESENT
    • Built a new set of ViewPresenters for each platform the framework supports.
    • Managed projects through issue resolution as part of my role.
    • Participated in the framework architecture design.
    • Presented the framework in conferences and public speeches.
    • Guided junior developers and made contributions to documentation.
    Technologies: Mobile App Development, Android, iOS, Git, C#, Xamarin.Forms, Xamarin, Android SDK, Visual Studio
  • CEO | Lead Mobile Developer

    2014 - 2019
    • Led a team of four developers with different seniorities involved in resource planning, coordination of tasks, and full responsibility for deadlines and objectives.
    • Developed cross-platform enterprise mobile apps in multiple lines of business, some with particular requirements (such as offline sync and background processing).
    • Developed cross-platform consumer mobile apps for investment groups. Participated in the concept and design of the apps as well.
    • Created a framework for Xamarin with a set of features, plugins, and abstraction for common functionalities.
    • Created binding libraries for Xamarin and contributed to several community maintained libraries.
    • Gave guidance and support to junior developers, making coding guidelines, slides, and exercises to help new developers get started.
    • Contributed to the functional analysis and design of UI/UX for mobile apps as part of the software development process.
    Technologies: Mobile App Development, Team Leadership, Visual Studio Code, Android, iOS, Git, C#, Xamarin.Forms, Xamarin, Android SDK, Visual Studio, Mobile Architecture, Firebase, Azure, .NET, MvvmCross, SQLite
  • Mobile Developer

    2017 - 2018
    Cortina Productions (via Toptal)
    • Built a native cross platform app for Android and iOS, to be used by thousand students.
    • Made Swift and Java libraries available to be used in Xamarin.
    • Built an offline sync engine that included downloading several videos in parallel, with optimized battery consumption.
    Technologies: Mobile App Development, Android, iOS, Git, C#, Xamarin, Visual Studio, Java, Swift, Subversion (SVN)
  • Mobile Developer

    2017 - 2017
    TillPOS (via Toptal)
    • Created a native application for iOS, Android, and UWP.
    • Built an offline data synchronization engine in C#.
    • Built a printer infrastructure with ESC/POS for the existing mobile app.
    • Created a cross-platform navigation service that respects platform idioms.
    • Developed a responsive/flexible UI using custom renderers.
    Technologies: Mobile App Development, Android, iOS, Git, C#, Xamarin.Forms, Xamarin, Visual Studio, MVVM Light Toolkit, SQLite
  • Mobile Developer

    2014 - 2015
    Clover Sistemas SRL
    • Developed a Xamarin-based cross-platform mobile app for a health insurance company that now has thousands of users.
    • Built a framework to make UI testing with Xamarin faster and more efficient.
    • Created a mobile app following TDD methodology as part of a group of developers. The app ended up having 80% test coverage.
    • Improved the speed and stability of a mobile app in maintenance (that I did not develop) by changing some of the core features of the app.
    Technologies: Mobile App Development, Android, iOS, Git, C#, Xamarin.Forms, Xamarin, Visual Studio, Couchbase, MvvmCross
  • IT Intern

    2013 - 2014
    Laboratorio STEM
    • Made a functional analysis of the entire workflow of the company and documented the processes. Those documents are now used to introduce new members to the company.
    • Created information reports based on the needs of the users and what I considered important. With this information, the company increased sales by over 30%.
    • Gave end-users training and support while using the company's software.
    • Made presentations and a workshop to introduce end-users to SQL.
    Technologies: C#, Visual Studio, Crystal Reports, .NET


  • Open Source Library: BreachDetector

    A mobile, cross-platform library based on Swift/Java components that allow mobile apps to detect root, emulation, debug mode, and other security concerns at runtime. This library is available for Xamarin developers.

  • Open Source Framework: MvvmCross

    I am a maintainer of MvvmCross, the popular MVVM framework for Xamarin.
    MvvmCross allows developers to build clean, pixel perfect, native UIs while sharing behavior and business logic in a single codebase across all the supported platforms, using the Model-View-ViewModel (MVVM) design pattern.

  • Open Source Library: EasyTipView

    This library is a C# port of an existing Swift library with the same name. It allows developers to easily place fully customizable tooltips in their app UIs. It is available for Xamarin.iOS developers.

  • Open Source Library: RootBeer (Xamarin)

    A Xamarin binding library for RootBeer, the famous Android Java component that allows developers to detect device root conditions in runtime. It is distributed through NuGet and customized to be C#-friendly.

  • Open Source Library: IOSSecuritySuite (Xamarin)

    A Xamarin binding library for the original IOSSecuritySuite library, an advanced and easy-to-use platform security and anti-tampering library written in pure Swift. This project contains all the annotations that make it C#-friendly.

  • SailConnect Mobile

    SailConnect is a mobile app written in Xamarin using the traditional approach. The app is available on Android and iOS. Within the app, users can attend events, chat, and prepare together before the race starts.

  • iDriveYourCar Drivers Mobile App

    A native mobile app developed with Xamarin and MvvmCross, available on iOS and Android platforms. This app is part of the business process of iDriveYourCar and supports the drivers' workflows. Within this app, drivers can manage their personal information, trips, and reviews. The app also supports all driver actions during a trip (call/chat with passengers or support, add expenses, and more).

  • Reveal Page Mobile

    A native mobile app available for iOS and Android platforms. Developed with Xamarin and MvvmCross, it uses SQLite, Fody, and ReactEx. It is a comprehensive mobile social network that connects people following their interests and passions. Within the app, users can add other users to their relationships and have conversations with them. They can also publish posts, create their own sticker, and create albums of stickers.

  • AtlonXpense Mobile

    A native mobile app for expense management developed with Xamarin and MvvmCross. Through this app, company workers can handle their expenses in a very effective and efficient way by taking full advantage of the multimedia capabilities today's smartphones bring. The application is available for iOS and Android platforms.

  • Billing App

    A native mobile app for iPad developed using Xamarin and MvvmCross. This app allows the owner's clients to generate documents, offers, work orders, and invoices offline and sync them later in the office. Invoices and work orders can be signed by clients within the app, which allows a better and more efficient workflow experience.

  • ClinicApp Mobile

    A native mobile app developed with Xamarin technologies. It is available for the Android platform. This app allows users to generate medical appointments directly from their phones, having the possibility to choose a particular doctor, date, and time. Users can also manage relatives and create appointments for them.

  • AtlonPManager

    A native mobile app for work and project planning inside companies. Through this app, users can manage their tasks and assignments, as well as exchange information with their coworkers. The application is available for iOS and Android platforms.

  • La Segunda NetVos

    A native mobile app for the insurance group La Segunda made for the customers of the company. Within the app, users can view their insurance policy data, download official certificates, and check their policy expiration date. Users can also register any accidents they have, attach photos, and verify the closest agencies using maps. I've developed the Windows mobile application and also participated in the development of the Android version of the app.


  • Languages

    C#, XML, XAML, Swift, TypeScript, GraphQL, JavaScript, YAML, Solidity, Java, SQL, HTML
  • Frameworks

    Windows Presentation Foundation (WPF), Android SDK, Xamarin.UITest, Newtonsoft JSON, .NET, React Native, MVVM Light Toolkit, Redux, .NET Core, YARN, AngularJS, ASP.NET MVC
  • Libraries/APIs

    Xamarin.Android, Xamarin.iOS, LINQ, SQLite.NET, MobX, Node.js, React
  • Tools

    Visual Studio, SourceTree, Fody, Slack, TFS, Git, GitHub, Visual Studio App Center, VS Code, G Suite, Xcode, Firebase Cloud Messaging (FCM), Android Studio, Azure Mobile, Jira, Postman, Trello, Crystal Reports, Subversion (SVN), NPM
  • Paradigms

    Agile Software Development, Model View Viewmodel (MVVM), REST, Agile, Mobile UI Design, Mobile UX Design, Mobile Design, Unit Testing, Scrum, Test-driven Development (TDD)
  • Platforms

    iOS, Android, UWP, Xamarin, MvvmCross, Visual Studio Code, MacOS, Azure, Firebase
  • Storage

    JSON, SQLite, Couchbase
  • Other

    Async/Await, Mobile Architecture, Leadership, Mobile Apps, Mobile App Development, Open Source, Xamarin.Mac, Technical Leadership, Team Leadership, Xamarin.Forms, Async.js, UX, Axios, Redux Toolkit, Documentation, Writing & Editing, Genetic Algorithms, Android Development, Algorithms, Integration Testing, HTTP, Enterprise Resource Planning (ERP)


  • Bachelor Degree in Software Engineering
    2009 - 2017
    Universidad Tecnológica Nacional - Rosario, Argentina
  • Exchange Semester (Via Universidad Tecnológica Nacional) in Software Engineering
    2014 - 2015
    Hochshule Esslingen - Esslingen, Germany


  • The Complete React Native + Hooks Course
  • Microsoft MVP
    MARCH 2018 - PRESENT
  • Xamarin Certified Mobile Developer
    JULY 2016 - JULY 2017
    Xamarin University
  • First Certificate in English
    Cambridge English Language Assessment

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