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Location

Poland

Rate

$20  / per hour

Years of experience

7+

About

With over a decade of experience in mobile and web development, I specialize in designing and implementing native and cross-platform mobile applications. I am proficient in Java, Kotlin, Swift, and Flutter, with extensive experience using development environments like Android Studio, Xcode, and Visual Studio Code. My expertise includes full-stack development, blockchain technology, and control engineering. I have a strong foundation in object-oriented design principles and Test Driven Development (TDD). Throughout my career, I have led teams, managed projects, and developed applications across various industries, including privacy management, cryptocurrency, real estate, and live streaming. My technical skillset is complemented by hands-on experience with cloud services, third-party APIs, and CI/CD tools, making me a versatile developer capable of delivering high-quality solutions. My educational background in Mathematics and Information Science further strengthens my analytical and problem-solving abilities.

Tech Stack

Android, Android Studio, API, Firebase, Jenkins, TestFlight, Xcode

Experience

  • Developed and maintained native Android and iOS applications using Java, Kotlin, Objective-C, and Swift, delivering high-quality mobile solutions.
  • Led and managed teams across multiple projects, successfully delivering applications in industries such as privacy management, cryptocurrency, real estate, and live streaming.
  • Implemented cross-platform applications using Flutter and React Native, ensuring consistent performance and user experience across devices.
  • Applied Test Driven Development (TDD) and object-oriented design principles, resulting in clean, maintainable, and robust codebases.
  • Integrated various third-party APIs and tools, including Google Maps, Firebase, AWS, and social network APIs, enhancing application functionality.
  • Designed and developed backend services using Node.js and PHP, ensuring seamless integration with cloud platforms like AWS and Firebase.
  • Built private ETH networks and dApp prototypes, contributing to advancements in blockchain technology.

Employment history

Android Developer, ErnieApp November 2020 - Present

• Designed and implemented features for the ErnieApp privacy management application using Kotlin and JavaScript.
• Integrated digital account connections for services like Google, Facebook, and LinkedIn to manage user privacy settings.
• Collaborated with cross-functional teams to ensure seamless functionality across multiple platforms.
• Debugged, optimized, and maintained the application to enhance performance and user experience.

Mobile Developer, MindTrust Lab December 2019 - December 2020

• Developed a full-featured account management application from scratch using Flutter.
• Created a web admin panel using Flutter, enabling administrators to manage app data effectively.
• Integrated backend services and third-party APIs to support application functionalities.
• Conducted testing and debugging to ensure the app met quality standards.

Senior Mobile Developer, Gigster Inc October 2015 - December 2019

• Performed a native/cross platform mobile developer role for Gigster. Gigster is
a smart software development service, combining top developers and designers.
• Built several iOS apps using Swift or React Native.
• Built several Android apps using Java, Kotlin or React Native.
• Optimized application performance and resolved bugs to ensure a smooth user experience.

Android SDK developer, Stream.io BV June 2019 - December 2019

• Developed an open-source Android chat SDK using Kotlin, providing developers with customizable messaging solutions.
• Ensured the SDK was robust, well-documented, and easy to integrate into existing applications.
• Conducted performance testing and optimization to maintain high standards of efficiency and reliability.

Android Developer, Asobimo Inc December 2018 – June 2019

• Performed a native iOS/Android/ developer role for Asobimo to build Android
and iOS cryptocurrency wallet app.
• Collaborated in iOS Swift cryptocurrency wallet app development.
• Built Android wallet app using Java and added crypto currency exchanger
service using Kyber and Changelly.com api.

Full Stack Developer, TheCryptoVault August 2017 - October 2018

• Developed a cryptocurrency trading helper site, integrating market data from multiple exchanges.
• Built and maintained backend services using Node.js, Express, and DynamoDB, ensuring reliable data processing and storage.
• Implemented a trading algorithm to provide users with timely notifications and market insights.

Project Manager & Mobile Developer, BluePrintSolutionsGroup Inc October 2015 - December 2016

• Led a team of engineers to develop a live streaming app using the Wowza streaming engine for sports fans.
• Managed the project timeline, resources, and deliverables, ensuring successful completion within deadlines.
• Developed a tourist communication app using WebRTC, enabling audio communication between tour guides and tourists.
• Coordinated with stakeholders to gather requirements and ensure the app met user needs.

Project Manager & Mobile Developer, Ready4S Mobile Apps April 2014 - October 2015

• Led a team of engineers in the development of a social networking app, including website, backend API, and mobile applications.
• Managed the creation of an e-commerce Android and iOS app, overseeing the entire development process.
• Ensured timely project delivery while maintaining high standards of quality and performance.

Mobile Developer, Positive Power Inc. October 2012 - April 2014

• Developed native iOS applications using Objective-C, focusing on user experience and performance optimization.
• Designed and implemented backend APIs using PHP to support mobile application functionalities.
• Conducted testing and debugging to identify and resolve issues, ensuring app stability.
• Collaborated with the design team to create intuitive and user-friendly interfaces.

Software Engineer, Positive Power Inc

• Developed web applications using PHP, MySQL, JavaScript, HTML, and CSS, meeting the needs of industrial clients.
• Collaborated with a team of developers to design, plan, and implement web-based solutions.
• Performed testing, debugging, and optimization to ensure the functionality and performance of web applications.

Education history

Warsaw University of Technology B.S. in Mathematics and Information Science
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