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I'm a senior mobile developer with 10+ years of experience building scalable apps from zero to 35,000+ users. I've led institutional mobile transformations and recently moved into independent contracting to help startups and scale-ups deliver robust mobile applications with solid technical foundations. I specialise in cross-platform delivery with offline-first architectures, location-based features, and reliable data synchronization, while keeping a sharp focus on performance, security, and user experience under tight deadlines.…I'm a senior mobile developer with 10+ years of experience building scalable apps from zero to 35,000+ users. I've led institutional mobile transformations and recently moved into independent contracting to help startups and scale-ups deliver robust mobile applications with solid technical foundations. I specialise in cross-platform delivery with offline-first architectures, location-based features, and reliable data synchronization, while keeping a sharp focus on performance, security, and user experience under tight deadlines.

Arkadiusz Dowejko

App Developer, Developer, Programmer, +4

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I'm a senior mobile developer with 10+ years of experience building scalable apps from zero to 35,000+ users. I've led institutional mobile transformations and recently moved into independent contracting to help startups and scale-ups deliver robust mobile applications with solid technical foundations. I specialise in cross-platform delivery with offline-first architectures, location-based features, and reliable data synchronization, while keeping a sharp focus on performance, security, and user experience under tight deadlines.…I'm a senior mobile developer with 10+ years of experience building scalable apps from zero to 35,000+ users. I've led institutional mobile transformations and recently moved into independent contracting to help startups and scale-ups deliver robust mobile applications with solid technical foundations. I specialise in cross-platform delivery with offline-first architectures, location-based features, and reliable data synchronization, while keeping a sharp focus on performance, security, and user experience under tight deadlines.

Available to hire

I’m a senior mobile developer with 10+ years of experience building scalable apps from zero to 35,000+ users. I’ve led institutional mobile transformations and recently moved into independent contracting to help startups and scale-ups deliver robust mobile applications with solid technical foundations.

I specialise in cross-platform delivery with offline-first architectures, location-based features, and reliable data synchronization, while keeping a sharp focus on performance, security, and user experience under tight deadlines.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Language

English

Fluent

Polish

Fluent

Work Experience

Independent Mobile Developer at Self-Employed / Independent

May 1, 2025 - Present

Available for contract and equity-based opportunities. Focus on helping startups and scale-ups deliver robust mobile applications with solid technical foundations.

Independent Mobile Developer at Independent (Freelance)

May 1, 2025 - Present

Available for contract and equity-based opportunities. Focus on helping startups deliver robust mobile applications with solid technical foundations.

Senior Mobile Developer at University of Nottingham

January 1, 2025 - September 29, 2025

Platform development: Built student mobile application from zero to 35,000+ active users across UK and Malaysia. Implemented offline functionality with intelligent caching. Delivered React Native apps for medical research projects with strict compliance requirements. Designed location-aware features for campus navigation. Maintained 99.9% uptime while shipping new features. Established CI/CD pipelines reducing deployment time by 75%.

Senior Mobile Developer at University of Nottingham

January 1, 2025 - September 29, 2025

Platform Development: Built student mobile application from zero to 35,000+ active users across UK and Malaysia. Implemented offline functionality with intelligent caching, delivered React Native applications for medical research projects with strict compliance requirements, designed location-aware features for campus navigation, maintained 99.9% uptime while shipping features, and established CI/CD pipelines with robust API integration.

Mobile Developer at Kopin Software

December 31, 2018 - August 27, 2025

Refactored legacy VR application codebase to improve maintainability and performance. Implemented Bluetooth and ANT+ integration for hardware communication, using Objective-C, Swift, and Bluetooth SDK technologies.

Mobile Developer at Experian

January 1, 2018 - September 29, 2025

Developed enterprise mobile applications within Agile framework. Built scalable native solutions with comprehensive testing strategies. Experience with large-scale user bases and enterprise security requirements.

Mobile Developer at Experian

January 1, 2018 - September 29, 2025

Mobile Developer at Experian

January 1, 2018 - August 27, 2025

Developed enterprise mobile applications within an Agile SAFe environment, creating scalable native mobile solutions for organisation-wide deployment. Utilized Swift, Objective-C, XCTest, OCMock, and Kotlin for development and testing.

Senior Mobile Developer & Technical Authority at University of Nottingham

January 1, 2018 - Present

Led core platform development and technical authority for CampusM platform serving 35,000+ active users across UK and Malaysia campuses. Held final technical approval responsibility for all releases, managing code reviews for internal and external teams. Scaled mobile team from 1 to 8 full-time employees, establishing development standards and quality assurance processes. Managed cross-functional governance with 7+ departments and led international platform expansion to Malaysian campus. Concurrently led multiple medical research application projects including MyEczema Tracker and React to Falls, ensuring compliance and safety-critical requirements. Oversaw student recruitment app development with a stack including Swift, SwiftUI, Kotlin, React Native, GraphQL, Firebase, and Azure DevOps.

iOS Developer at Nutracheck

January 1, 2016 - September 29, 2025

Developed nutrition tracking application across iPhone, iPad, and Apple Watch. Managed large dataset processing, offline functionality, and App Store optimisation for consumer-scale application.

iOS Developer at Nutracheck

January 1, 2016 - September 29, 2025

Developed nutrition tracking application competing with MyFitnessPal across iPhone, iPad, and Apple Watch. Managed large dataset processing, offline functionality, and App Store optimization for consumer-scale application.

iOS Developer at Nutracheck

January 1, 2016 - August 27, 2025

Developed a nutrition tracking app competing with MyFitnessPal on iPhone, iPad, and Apple Watch platforms. Optimized application performance for large datasets and managed the App Store submission process. Utilized Objective-C, Swift, Core Data, HealthKit, and WatchKit technologies.