Publication
Simplifying RESTful API Use and Data Persistence on iOS with Mantle and Realm
https://www.toptal.com/developers/ios/simplifying-restful-api-use-and-data-persistence-on-ios-with-mantle-and-realm
Marcin is currently unavailable
Marcin Kmiec
Verified Expert in Engineering
Software Developer
Kraków, Poland
Toptal member since June 27, 2015
Bio
Marcin is a mobile software developer with ten years of professional programming experience. In addition to mobile apps he is pursuing game development, his lifelong passion, commercially. He has completed successful Unity projects (released for iOS and Android) and is open to new platforms. Marcin is able to deliver top-notch quality code as well as prioritize results over anything else.
Portfolio
Self-employed
Unity, .NET, Kotlin, Swift, Android, iOS
Michael Osofsky (via Toptal)
Objective-C
BookSwapper (via Toptal)
JavaScript, Parse, Objective-C
Experience
- REST - 6 years
- iOS SDK - 6 years
- Objective-C - 6 years
- C# - 5 years
- Unity3D - 5 years
- Swift - 3 years
- Android - 3 years
- Core Data - 3 years
Preferred Environment
Pivotal Tracker, Trello, Bitbucket, GitHub, Xcode
The most amazing...
...thing I've developed is emotion detection software covered by Techcrunch.
Work Experience
Mobile Unity Developer
2015 - PRESENT
Self-employed
- Developed mobile apps for iOS and Android.
- Led the development of a social app covered by Techcrunch and Al Jazeera.
- Wrote a photo and video editing app with a million downloads.
- Worked on a large Unity project that was released for iOS and Android.
- Designed and implemented a compression algorithm for photo and video filters.
- Coordinated back-end development for a number of apps.
Technologies: Unity, .NET, Kotlin, Swift, Android, iOS
Objective-C Developer
2015 - 2015
Michael Osofsky (via Toptal)
- Developed a dating app from scratch.
- Implemented pixel-perfect graphic design.
- Worked closely with a distributed team.
- Performed API tests and assisted during back-end development.
- Handled submission to the App Store.
Technologies: Objective-C
Objective-C Developer
2015 - 2015
BookSwapper (via Toptal)
- Developed an iOS app from scratch in Objective-C.
- Developed a scalable Parse back end with custom cloud code.
- Integrated in-house ads using MoPub.
- Implemented scalable server-side search.
- Handled the App Store submission process.
Technologies: JavaScript, Parse, Objective-C
Swift Developer
2015 - 2015
Spooky, Inc. (via Toptal)
- Developed an iOS app using Alamofire networking framework.
Technologies: Swift
iOS Developer
2014 - 2015
Codete
- Developed new as well as analyzed and improved existing iOS applications in Objective-C using a number of frameworks and technologies including Core Data, multithreading (GCD, NSOperation), and multiple communication stacks.
- Created an augmented reality app for a car manufacturer using Metaio framework.
- Ported a BlackBerry app into iOS with full data encryption.
- Worked on a quiz application that used websockets to maintain the connection with the web service in real time.
- Used unit and functional tests in a continuous integration environment.
Technologies: Objective-C
iOS Developer
2013 - 2015
Freelance
- Developed a location tracking app with continuous background location updates and balanced battery usage.
- Coordinated web service development with an external developer.
- Wrote an iOS client of a popular social news website that's nearly topping the US App Store chart in its highly competitive category.
Technologies: Objective-C
Computer Vision Researcher
2011 - 2014
AGH University of Science and Technology
- Performed research on object detection in images.
- Implemented various computer vision algorithms in C/C++ using OpenCV.
- Designed software architecture of a real-time computerized CCTV system.
- Created an in-house image database accesible through a RESTful API.
- Performed code reviews.
Technologies: OpenCV, C++
PhD Student Contractor
2009 - 2012
ABB Corporate Research Center Krakow
- Developed embedded software for power-grid control devices.
- Designed, developed, and maintained user-friendly C/C++ software libraries.
- Integrated third-party middleware.
- Developed reference designs.
- Supervised junior developers.
Technologies: C++, C
Experience
Polygram
https://techcrunch.com/2017/08/25/polygram/Polygram was a social app that detected facial reactions to shared photos and videos.
Portal App
An augmented reality application running on iOS and Android, developed in Unity3d.
Liveclip iOS
A live photo editing app for iOS.
Liveclip Android
A motion picture editing app for Android.
Book Swapper
An app aimed at college students allowing them to buy and sell their textbooks. Developed both the iOS app and Parse back end with JavaScript cloud code.
Hacker News Client
A client on the App Store using the official Firebase API. A very successful app with a lot of reviews and a five-star rating in the US.
CoffeeOrBeer App
A location-based app using Square API and Google Maps SDK.
Augmented Reality iPad App
An iPad app using Metaio augmented-reality framework used to train car dealers in Germany.
DriverRadar
An iOS location tracking app with continuous background location updates and balanced battery usage developed for a restaurant in Ireland to optimize their food delivery process.
iOS Secure Data Storage App
An application aimed at corporate users to securely store classified information.
Scientific Journals Search Engine for Poland's Scientists
I developed this site back in 2012 to solve my own problem of searching through a PDF list of some 20,000 scientific journals, which took forever. I scrobbled the list into a MySQL table and implemented a search as you type with JavaScript and PHP. The website went viral and now enjoys around a thousand visits a day.
Tutorial on Using RESTKit Framework with Core Data
This blog post of mine aimed at intermediate iOS developers has made it to the first page of Google results for "RESTKit tutorial," enjoys roughly a hundred visit a day, and has been recommended by numerous developers.
Portal AR
An augmented reality Unity application released for both iOS and Android.
Football Royale
A mobile game written in Unity released on Android, with an iOS release in the works.
Education
2004 - 2009
Master of Science Degree in Computer Science
AGH University of Science and Technology - Krakow, Poland
Skills
Libraries/APIs
Parse SDK, OpenCV, Alamofire, Socket.IO
Tools
Git, Xcode, GitHub, Bitbucket, Trello, Pivotal Tracker
Languages
Swift 4, C, C++, Objective-C, Java, Kotlin, C#.NET, Swift, C#, PHP, JavaScript
Frameworks
Core Location, iOS SDK, AFNetworking, Swagger, .NET, Unity3D, Core Data, Unity
Paradigms
REST
Platforms
Firebase, iOS, Android, Parse
Storage
Realm, MySQL
Other
User Interface (UI), Front-end, SAP Sales and Distribution (SAP SD), WebSockets
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