Mobile Developer (Android + iOS)
2018 - PRESENTEase (formely EaseCentral)- Wrote an Android app from scratch based on the existing iOS version. (Kotlin).
- Refactored the entire iOS application to incorporate clean architecture paradigms and clean code (Swift).
- Introduced instrumented tests for both Android and iOS using Espresso (Android) and EarlGrey + XCUITest (iOS).
- Integrated Fastlane for iOS and Android project to help build a working continuous integration solution.
- Introduced unit tests for both Android and iOS applications.
- Built custom Gradle scripts to allow easier execution for the continuous integration pipeline of Android app.
Technologies: Mobile, Android SDK, Android Testing, Android, iOS, Swift, KotlinFlutter Developer
2020 - 2020Vid, Inc. (via Toptal)- Created video processing functionalities in Flutter, targetting both iOS and Android. Video processing included: Encoding videos, trimming, and applying separate audio streams from the audio files.
- Introduced new functionalities into the Flutter project as well as existing ones, making sure all of them work well on both iOS and Android.
- Helped the team to promptly deliver the Android counterpart written in Flutter based on the existing iOS native app.
Technologies: Mobile, Flutter SDK, Video & Audio Processing, Video Processing, iOS, Android, Video, FlutterFlutter Developer
2020 - 2020Juno Digital Pte., Ltd. (via Toptal)- Created a lottery results app in Flutter from scratch for both Android and iOS.
- Created store listing on Google Play and App store and conducted the release process.
- Added crash reporting functionalities (Crashlytics) to the Flutter project and monitored the app's performance and health in order to prevent bad user experience.
Technologies: Mobile, iOS, Android, Flutter SDK, FlutterAndroid Developer
2019 - 2020Dubsmash (via Toptal)- Introduced new features in a video social media app with over 100 million downloads.
- Participated in a mature and well-organized scrum process.
- Helped with the transition of the Java source code into Kotlin.
- Helped with the redesign of the outdated user interface.
- Augmented the current continuous integration setup with custom scripts that automated tedious, repetitive tasks.
Technologies: Mobile, Android SDK, Android Testing, GraphQL, Kotlin, AndroidFull-stack Android Developer
2019 - 2019Johnson Lab & Supply (via Toptal)- Created an Android app that allows field workers to log their work as well as upload photos and record their exact GPS location.
- Created an admin panel within the app that requires authentication and authorization. It allows the manager to manage projects and employees as well as export all collected data to be viewable on the PC.
- Designed a Firebase database and optimized it for bandwidth usage as well as keeping the data structure as flat as possible.
- Introdued Firestore storage service to allow users to upload files that are referenced in the database and allows for assigning files to certain work items.
- Introduced Firebase Authentication to allow managers to authenticate when logging into the admin panel.
Technologies: Cloud Firestore, Mobile, Android SDK, GPS, Firebase Authentication, Firebase Realtime Database, Firebase, Kotlin, AndroidSenior Android Developer
2017 - 2018Disney Streaming Services- Helped build an Android SDK for core functionalities within client apps in an organization such as authentication, media streaming, and HTTP API communication layer.
- Maintained and improved Gradle quality plugins related to unit testing and code coverage.
- Improved the architecture of the SDK to improve testability and mocking for client apps.
Technologies: Mobile, Android SDK, Android Testing, Kotlin, AndroidAndroid Engineer
2017 - 2018Max2 (via Toptal)- Maintained and added new features to an enterprise application for business where venue owners can mange their premises, staff, and client relations.
- Took care of the continuous integration environment by making sure it is paired up with the code review process.
- Advised a client with Android-specific decisions about design.
Technologies: Mobile, Android SDK, Android Testing, Bluetooth, Kotlin, Java, AndroidSenior Android Developer
2016 - 2017Tooploox- Introduced CI/CD into the project.
- Helped junior developers understand clean architecture and clean code principles.
- Worked on an Android project for a media industry client from the US.
- Advised the client about possible solutions for certain problems.
- Helped the design team provide designs adhering to material design principles.
Technologies: Cloud Firestore, Mobile, Android SDK, Android Testing, Kotlin, Clean Architecture, Espresso, JUnit, Jira, Jenkins, Java, AndroidLead Android Developer
2016 - 2016X8 Digital Studio- Created an Android app for an enterprise client from the UK that helps with networking during different conferences and meetups.
- Maintained different smaller Android apps within the company.
- Introduced CI/CD for all projects being maintained.
- Worked closely and directly with the clients to identify their needs and suggest optimal solutions.
- Refactored apps to work with clean architecture.
- Incorporated clean code principles into new projects.
Technologies: Mobile, Android SDK, Android Testing, Espresso, CircleCI, Git, JUnit, Jenkins, Java, AndroidSenior Android Developer
2013 - 2016Ceneo sp. z o.o.- Led the Android development team, which consisted of three people.
- Designed architecture and implemented an Android app for the biggest price comparison company in Poland.
- Introduced CI/CD with Atlassian's Bamboo.
- Wrote UI and unit tests.
- Helped the product owner to identify user needs and plan new features.
- Guided and taught new Android developers' best practices.
- Worked with an MVP (Model-view Presenter) pattern.
Technologies: Mobile, Android SDK, Android Testing, Jira, Espresso, JUnit, Bamboo, Jenkins, Java, Android