Mateusz is available for hire

Mateusz Grzegorzek

Verified Expert in Engineering

Software Developer

Location

Wrocław, Poland

Toptal Member Since

January 7, 2014

Mateusz is an iOS and Windows Phone expert helping companies and startups design and develop mobile apps tailored to user needs. He holds a Master's Degree in Information Technology from the Warsaw University of Technology and has been developing mobile applications since 2004.

Android .NET ASP.NET C#Objective-C Cocoa Touch iOS Windows Phone Windows Phone 7 Windows Phone 8 C C++Microsoft Silverlight Xcode Visual Studio 2010

Portfolio

The Run SMART Project, LLC

Flutter, ASP.NET, iOS, Android, Dart, Swift, jQuery, .NET, Azure

MoadBus, Inc.

Windows, Windows Phone, iOS

Rivia

Windows Phone, iOS, .NET, Azure, Dart, Flutter, Swift, Android

Experience

Android - 10 years ASP.NET - 9 years C# - 8 years Azure - 6 years iOS - 4 years Cocoa Touch - 4 years Objective-C - 4 years Flutter - 3 years

Availability

Part-time

Preferred Environment

.NET, Visual Studio, MacOS, Xcode, Visual Studio Code (VS Code), Flutter, .NET Core, Azure, Dart

The most amazing...

...project I've ever created is the vdoto2.com platform, a coaching app for runners. I've built both mobile and web apps and maintained the cloud infrastructure.

Work Experience

Lead Developer | Mobile and Web

2014 - PRESENT

The Run SMART Project, LLC

Developed iOS and Android mobile apps. Ported the project from a native mobile app to Flutter in 2020.
Built the web app, back-end and front-end, and REST APIs.
Maintained the cloud infrastructure on Azure which handles 20,000 to 30,000 monthly active users.

Technologies: Flutter, ASP.NET, iOS, Android, Dart, Swift, jQuery, .NET, Azure

Senior iOS/Windows Phone Developer

2009 - PRESENT

MoadBus, Inc.

Developed and maintained a mobile banking application for iOS and Windows Phone.
Developed a proof of concept app for iPad helping to perform day-to-day tasks for bank clerks.
Created several app prototypes for mobile payment, e-coupon, e-wallet, etc.

Technologies: Windows, Windows Phone, iOS

Owner, Freelancer

2006 - PRESENT

Rivia

Developed the YomoMedia News Reader app for the Windows Phone OS.
Built several games for the SonicBoom Inc. company for iPhone.
Developed an eBook reader app for Windows Phone.
Created several apps for the Windows Mobile platform (Gentimer, Friendzee, and Fishopolis).
Handled several small projects for other companies, including maintaining existing apps, etc.

Technologies: Windows Phone, iOS, .NET, Azure, Dart, Flutter, Swift, Android

Windows Mobile Developer

2004 - 2006

Psiloc Mobile Solutions

Developed and maintained several apps for Windows Mobile (World Traveller, TinyGPS, Wireless Presenter).

Technologies: C++, Windows Mobile

Experience

VDOT O2

http://vdoto2.com

V.O2 is a coaching app for athletes of all levels looking to improve their running. The app comprises web and companion mobile apps and handles about 20,000 to 30,000 monthly active users. I've been a lead developer behind the project.

Mobile Banking App Suite

http://rivia.net/wp-content/uploads/2012/11/MateuszGrzegorzek_ApplicationPortfolio.pdf

The Mobile Banking suite consists of several applications for several mobile operation systems:
• Mobile Banking
• Mobile Wallet
• Mobile Branch Banking

The project was created under NDA and I cannot share the details about the contractor, but the link details some general information about the projects.

InstaSize

InstaSize is still the original and easiest way to post entire photos on Instagram without cropping. We’ve just added a few more features that will make your photo’s that much better.

* The app allows to post entire photos on Instagram without cropping
* Photo editing features – filters, overlays, scale, crop, etc.
* Use of multiple Nokia Imaging SDK filters (several custom ones)
* Windows Azure services integration
* Advanced Memory Management – the application requires significant amount of memory during rendering as it can create images up to 2048x2048px size.
* Custom UI Elements - several UI controls and animations had to be created specifically for this app

Port BarTune iOS app to Windows Phone

The Windows Phone app was created from scratch as exact replica of iOS version to give all users the same experience across all platforms (iOS, Windows Phone and Android). Android project involved upgrading existing app to match the UI of 2 other applications and fixings several bugs.

YomoMedia News Reader

YomoMedia is the most complete RSS Newsreader and Podcast Viewer available for Windows Phone 7. It is now updated for Mango background operation and tiles.

Ebook Reader for Windows Phone

eBooks.com's eBook Reader lets users read their favorite books on the go. Users can visit eBooks.com and choose from a massive collection of popular books for rapid download or for reading online from any internet-connected device.

Skills

Languages

C#, Objective-C, Swift, C, C++, Java, Dart

Frameworks

.NET, Cocoa Touch, ASP.NET, Swagger, Flutter, .NET Core, Angular

Paradigms

Object-oriented Programming (OOP), Agile Software Development

Platforms

iOS, Windows Phone, Windows Phone 7, Windows Phone 8, Android, Windows, Azure, Windows Mobile, MacOS, Visual Studio Code (VS Code)

Other

Financial Software, Software Development, Financial Software Developer, User Experience (UX)

Tools

Microsoft Silverlight, Xcode, Visual Studio 2012, Visual Studio 2010, Visual Studio, Visual Studio 2008

Libraries/APIs

Facebook API, jQuery, jQuery UI, CocoaPods

Storage

SQL Server 2008, Microsoft SQL Server, Couchbase

Education

2002 - 2007

Master's Degree in Information Technology

Warsaw University of Technology - Warsaw, Poland

Collaboration That Works

How to Work with Toptal

Toptal matches you directly with global industry experts from our network in hours—not weeks or months.

Share your needs

Discuss your requirements and refine your scope in a call with a Toptal domain expert.

Choose your talent

Get a short list of expertly matched talent within 24 hours to review, interview, and choose from.

Start your risk-free talent trial

Work with your chosen talent on a trial basis for up to two weeks. Pay only if you decide to hire them.

Top talent is in high demand.

Start hiring