Marcin Szalski - Mobile / Game Developer

Q: Where is Marcin based?

Marcin is based in Toruń, Poland and can operate in on-site , hybrid , and remote work models.

Q: What languages does Marcin speak?

Marcin speaks the following languages: Polish (Native), German (Advanced), English (Advanced) .

Q: How many years of experience does Marcin have?

Marcin has at least 16 years of experience. During this time, Marcin has worked in at least 8 different roles and for 9 different companies . The average length of individual experience is 2 years and 9 months . Note that Marcin may not have shared all experience and actually has more experience.

Q: What is Marcin's latest experience?

Marcin's most recent position is Mobile / Game Developer at Freelancer .

Q: What companies has Marcin worked for in recent years?

In recent years, Marcin has worked for Freelancer .

Q: Which industries is Marcin most experienced in?

Marcin is most experienced in industries like Information Technology (IT) , Telecommunication , Media, and Entertainment and Publishing . Marcin also has some experience in Education , Healthcare , and Banking and Finance .

Q: Which business areas is Marcin most experienced in?

Marcin is most experienced in business areas like Information Technology (IT) and Product Development .

Q: Which industries has Marcin worked in recently?

Marcin has recently worked in industries like Information Technology (IT) .

Q: Which business areas has Marcin worked in recently?

Marcin has recently worked in business areas like Information Technology (IT) and Product Development .

Recommended expert

Toruń, Poland

Experience

Nov 2017 - Present

8 years 5 months

Poland

Mobile / Game Developer

Freelancer

Creation and maintenance of Android & iOS programming applications
Roles: developer, architect, tech leader
Publications: C99 • ADR APP Mobile - Android & iOS; C++1z • Billionaire City - Android & iOS; C# • Coca-Cola Freestyle - Android; GLSL • Double Eagle - Android; Java • DynoRoad - Android & iOS; JavaScript • FPDailyCheck - Android & iOS; Kotlin • my Randstad - Android; Lua • PolyJoy - Android; Objective-C • RideLink - Android; Objective-C++ • Slots Billionaire - Android & iOS; Python • Truecaller - Android
Technologies: Android SDK, Capacitor, Coroutines, C99, C++17, Swift Dagger, Fastlane, Firebase, iOS SDK, Jetpack Compose, JNI, JUnit, J2SE, Kotlin, Lua, Moya, Objective-C, OpenGL ES SL, RxJava, RxSwift, Swift, Typhoon, Xamarin.Forms

Sep 2016 - Nov 2017

1 year 3 months

London, United Kingdom

Android Developer

YouView TV Ltd

Creation and maintenance of Android applications
Roles: developer, architect
Publications: YouView - Android
Technologies: Android SDK, C, C++1z, Jenkins, JNI, JUnit, J2SE, Kotlin, Mockito, PowerMock, Robolectric, Ruby, RxJava

Apr 2016 - Sep 2016

6 months

London, United Kingdom

Senior Android Developer

Kinosis Ltd

Maintenance of Android applications
Roles: developer
Publications: Touch Surgery - Android
Technologies: Android SDK, C++11, Jenkins, JNI, J2SE, ODB, Robolectric

Apr 2015 - Mar 2016

1 year

Warsaw, Poland

Software Developer

Opera Software Poland Sp. z o.o.

Creation of Android applications (web browser integration, video streaming)
Roles: developer, architect
Technologies: Android SDK, Butter Knife, C++11, Dagger, EasyMock, Google Mock, Google Test, Infector++, Jenkins, JUnit, J2SE, Python, SQLite3

Oct 2014 - Apr 2015

7 months

Warsaw, Poland

Software Consultant

Cybercom Poland Sp. z o.o.

Creation of iOS applications (UI, business logic, DB)
Publications: TrustCase Secure Business Messenger
Technologies: C, iOS SDK, Objective-C, OCMock, OpenGL ES SL, SpriteKit, SQLite3, Swift, Typhoon, XCTest

Jul 2014 - Sep 2014

3 months

Warsaw, Poland

Mobile Software Developer

Getin Noble Bank S.A.

Refactoring of internal Android applications and maintenance of flagship Android applications (UI, business logic)
Technologies: Android SDK, C++, EasyMock, Google Mock, Google Test, Guava, JMockit, JUnit, J2SE, RoboGuice, Robolectric

Oct 2011 - Jun 2014

2 years 9 months

Games Neox

Porting of Amiga cracktros, games and intros to mobile systems (UI, business logic, DB) on Android, iOS and Windows Phone
Creation of iOS and Android utility libraries
Publications: Bobo Level 2; Bobo Level 5; NXDemo 00B; NXDemo 01B; NXDemo 03A; NXDemo 04A; GNThreadPool
Technologies: Android SDK, Cocoapods, C++, C#, JNI, J2SE, Objective-C, OpenGL ES 1.x, Travis

Oct 2011 - Jun 2014

2 years 9 months

Warsaw, Poland

Junior Software Engineer / Software Engineer

Samsung Electronics Poland R&D Center

Creation and maintenance of the Android embedded joyn client (UI, business logic, DB, network communication)
Roles: developer, Technical Group lead, business representative during meetings with GSMA and MNOs
Technologies: Android SDK, C, C++, EasyMock, Guava, Guice, Jenkins, JNI, JUnit, J2SE, ORMLite, Robolectric, SQLite3

Jul 2010 - Sep 2011

1 year 3 months

Bydgoszcz, Poland

Game Developer

Frontline Studios Sp. z o.o.

Creation of games for Android, iOS, Nintendo DS and Mac OS (UI, business logic, DB)
Roles: lead developer
Publications: Vanessa Saint-Pierre Delacroix - Android & iOS; Potty Racers 2 - iOS
Technologies: Android SDK, C++, JNI, J2SE, Objective-C, OpenGL ES 1.x/2.0, Python

Industries Experience

See where this freelancer has spent most of their professional time. Longer bars indicate deeper hands-on experience, while shorter ones reflect targeted or project-based work.

Experienced in Information Technology (13.5 years), Telecommunication (2.5 years), Media and Entertainment (1 year), Education (0.5 years), and Healthcare (0.5 years).

Information Technology

Telecommunication

Media and Entertainment

Education

Healthcare

Business Areas Experience

The graph below provides a cumulative view of the freelancer's experience across multiple business areas, calculated from completed and active engagements. It highlights the areas where the freelancer has most frequently contributed to planning, execution, and delivery of business outcomes.

Experienced in Information Technology (15.5 years) and Product Development (14 years).

Information Technology

Product Development

Skills

Mobile Technologies
Agile
Tdd
Software Design
Cross-platform Solutions
Algebra
Chaos Theory
Fractals
Powerlifting
Running
Movie
Demoscene
Guitar Playing
Foreign Languages

Languages

Polish

Native

German

Advanced

English

Advanced

Education

Oct 2013 - Jan 2016

University of Silesia

Magister of Science in Mathematics, Specialization in Mathematics for Finance and Economics · Mathematics · Katowice, Poland

Oct 2008 - Jul 2011

Kazimierz Wielki University

Licentiate in Mathematics, Specialization in Mathematics for Computer Science · Mathematics · Bydgoszcz, Poland

Profile

Created

November 2025

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Frequently asked questions

Do you have questions? Here you can find further information.

Where is Marcin based?

Marcin is based in Toruń, Poland and can operate in on-site, hybrid, and remote work models.

What languages does Marcin speak?

Marcin speaks the following languages: Polish (Native), German (Advanced), English (Advanced).

How many years of experience does Marcin have?

Marcin has at least 16 years of experience. During this time, Marcin has worked in at least 8 different roles and for 9 different companies. The average length of individual experience is 2 years and 9 months. Note that Marcin may not have shared all experience and actually has more experience.

What roles would Marcin be best suited for?

Based on recent experience, Marcin would be well-suited for roles such as: Mobile / Game Developer, Android Developer, Senior Android Developer.

What is Marcin's latest experience?

Marcin's most recent position is Mobile / Game Developer at Freelancer.

What companies has Marcin worked for in recent years?

In recent years, Marcin has worked for Freelancer.

Which industries is Marcin most experienced in?

Marcin is most experienced in industries like Information Technology (IT), Telecommunication, Media, and Entertainment and Publishing. Marcin also has some experience in Education, Healthcare, and Banking and Finance.

Which business areas is Marcin most experienced in?

Marcin is most experienced in business areas like Information Technology (IT) and Product Development.

Which industries has Marcin worked in recently?

Marcin has recently worked in industries like Information Technology (IT).

Which business areas has Marcin worked in recently?

Marcin has recently worked in business areas like Information Technology (IT) and Product Development.

What is Marcin's education?

Marcin holds a Master in Mathematics from University of Silesia and a Bachelor in Mathematics from Kazimierz Wielki University.

What is the availability of Marcin?

Marcin is immediately available full-time for suitable projects.

What is the rate of Marcin?

Marcin's rate depends on the specific project requirements. Please use the Meet button on the profile to schedule a meeting and discuss the details.