12/24/2025 updated

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Senior Mobile Software Developer

Torun, Poland
Germany +6
info: Germany, Austria, Switzerland, United Kingdom, Slovakia, Sweden, Czech Republic
Master of Science in Mathematics
Torun, Poland
Germany +6
info: Germany, Austria, Switzerland, United Kingdom, Slovakia, Sweden, Czech Republic
Master of Science in Mathematics

Profile attachments

CV_marcinszalski.pdf

Java (Programming Language)JavaScriptAndroid StudioIOS ApplicationsApple IOSApple Mac SystemsApple XcodeArchitectureC++ (Programming Language)DatabasesData ManagementEclipse (Software)Video Game DevelopmentIntelliJ IDEAMobile Application SoftwareJUnitPython (Programming Language)Microsoft Visual StudioObjective-C (Programming Language)Quality ManagementMockitoSoftware EngineeringTechnical ManagementWeb ApplicationsTestingOperations and Management PlatformSwift (Programming Language)KotlinProgramming Languages
Mobile App Development
Extensive experience in creating and maintaining Android and iOS applications using various frameworks and technologies

Cross-Platform Development
Proficiency in developing applications for multiple platforms including Android, iOS, and desktop systems

Software Architecture
Strong background in software design, technical leadership, and architectural decision-making for mobile applications

Programming Languages
Expertise in multiple programming languages including Java, Kotlin, Swift, C++, Python, JavaScript, and Objective-C

Development Tools and IDEs
Proficient with Android Studio, Xcode, IntelliJ IDEA, Eclipse, Visual Studio, and other development environments

Game Development
Experience in creating games for various platforms including Android, iOS, Nintendo DS, and Mac OS

Database Technologies
Knowledge of database systems and data management for mobile and web applications

Testing and Quality Assurance
Experience with testing frameworks including JUnit, Mockito, and various testing methodologies

Experience

Professional experience10+ years
Freelancer since2017

Languages

GermanBasic knowledgeEnglishFluentPolishNative speaker

Project history

Mobile / Game Developer

Freelancer
Creation and Maintenance of Android & iOS applications. Roles: developer, architect, tech leader

Android Developer

YouView TV Ltd
Creation and Maintenance of Android applications. Roles: developer, architect

Senior Android Developer

Kinosis Ltd
Maintenance of Android applications. Roles: developer

Software Developer

Opera Software Poland Sp. z o.o.
Creation of Android applications (web browser integration, video streaming). Roles: developer, architect

Software Consultant

Cybercom Poland Sp. z o.o.
Creation of iOS applications (UI, business logic, DB)

Mobile Software Developer

Getin Noble Bank S.A.
Refactoring of internal Android applications and Maintenance of flagship Android applications (UI, business logic)

Junior Software Engineer / Software Engineer

Samsung Electronics Poland R&D Center
Creation and Maintenance of the Android embedded jojn client (UI, business logic, DB, network communication). Roles: developer, Technical Group lead, business representant during meetings with GSMA and MNOs

Developer

Games Neox
Porting of Amiga cracktros/games/intros to mobile systems (UI, business logic, DB): Android, iOS, Windows Phone; Creation of iOS & Android utility libraries

Game Developer

Frontline Studios Sp. z o.o.
Creation of games for Android, iOS, Nintendo DS, Mac OS (UI, business logic, DB). Roles: lead developer

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