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Stepan Rudenko
Verified Expert in Engineering
Software Developer
Burlington, ON, Canada
Toptal member since December 7, 2017
Bio
Stepan is a software developer and certified scrum master with more than a decade of experience developing and designing applications across a variety of industries. In his career, he's built medical software, provided big business solutions (for banks), and created Android applications. Stepan believes that good communication is the key to developing a wildly successful product.
Portfolio
AgileEngine
React Native, Mobile, Flutter, Android, iOS, IT Management, Leadership, Docker...
Zanthion, Inc.
Amazon Web Services (AWS), AMQP, Python, React, React Native, Android...
AgileEngine
CircleCI, AWS Lambda, Amazon S3 (AWS S3), AWS CodeDeploy, Amazon EC2, Node.js...
Experience
- Computer Science - 19 years
- Android - 10 years
- Technical Leadership - 10 years
- Android NDK - 8 years
- React Native - 5 years
- Cross-platform - 5 years
- Expo - 3 years
- AI Model Integration - 2 years
Preferred Environment
MacOS, Linux, Visual Studio Code (VS Code), Xcode, Claude Code, Codex, GitHub Copilot
The most amazing...
...thing I've worked on is a web browser for more than two million users; also worked on cutting-edge technologies like AR and indoor positioning systems.
Work Experience
Director of Engineering | Mobile Direction
2021 - PRESENT
AgileEngine
- Designed and implemented personalized development plans for engineers, fostering their professional growth within the company.
- Established engineering manager's activities and routines. Covered engineering support across the entire company.
- Oversaw engineering managers leading diverse teams in multiple directions and technology stacks, including software engineers, DevOps engineers, and quality assurance professionals.
Technologies: React Native, Mobile, Flutter, Android, iOS, IT Management, Leadership, Docker, CTO, Native Mobile Apps, Technical Leadership, Team Management, Budget Management, Predictive Modeling, Data Analysis, Cross-platform, Cloudflare, Google Play Store, SDKs, Third-party Integration, Full-stack, Computer Vision, Mobile App Development, Artificial Intelligence (AI), Expo, AI SDK, Docker Compose, Jest, Certified ScrumMaster (CSM), Agile Software Development, Bluetooth Low Energy (LE), Firebase Cloud Messaging (FCM), Mockito, AI Model Integration
Head of Development
2019 - 2021
Zanthion, Inc.
- Designed the entire system from scratch, encompassing client-server communication, hardware components, and mobile applications.
- Designed the gateway (hub) that could run on any Android-enabled device, serving as the central node for an IoT network.
- Created a solution that allows connecting different BLE sensors to collect data while devices move between gateway spots.
- Managed the development team to work on multiple projects, including the dashboard (React), gateway (Android), mobile clients (React Native), and back end (Python).
- Participated in business strategy planning and preparing the requirements for the tech team.
Technologies: Amazon Web Services (AWS), AMQP, Python, React, React Native, Android, Internet of Things (IoT), System Architecture, IT Management, Android Studio, Android SDK, REST APIs, Leadership, Docker, Kotlin, Android TV, Software Architecture, Native Mobile Apps, Technical Leadership, Team Management, Budget Management, Predictive Modeling, Data Analysis, Cross-platform, Google Play Store, SDKs, Third-party Integration, Full-stack, Mobile App Development, Expo, AI SDK, Docker Compose, Jest, Certified ScrumMaster (CSM), Agile Software Development, Bluetooth Low Energy (LE), Firebase Cloud Messaging (FCM), Mockito, AI Model Integration
Tech Lead | Senior React Native Engineer
2018 - 2021
AgileEngine
- Followed up with a client about the initial requirements list and initiated the development process to ensure a successful project launch.
- Created the CI/CD setup to continuously deliver development progress to the client.
- Performed a demo every two weeks, along with progress updates, to have the client and team on the same page.
- Led a team of two React developers and one React Native engineer.
- Contributed to the full-stack web and mobile back- and front-end development.
Technologies: CircleCI, AWS Lambda, Amazon S3 (AWS S3), AWS CodeDeploy, Amazon EC2, Node.js, React, React Native, System Architecture, IT Management, TypeScript, REST APIs, Leadership, Docker, Software Architecture, Native Mobile Apps, Technical Leadership, Team Management, Data Analysis, Cross-platform, Google Play Store, SDKs, Third-party Integration, Full-stack, Mobile App Development, Expo, Docker Compose, Jest, Certified ScrumMaster (CSM), Agile Software Development, Bluetooth Low Energy (LE), Firebase Cloud Messaging (FCM), Mockito
Senior Android Engineer
2017 - 2018
Petcube
- Created a logging system based on MQTT and JobScheduler to collect logs and analytics for the support team to help clients with their issues.
- Migrated the code from Google Cloud Messaging to Firebase Cloud Messaging.
- Built a Jenkins CI solution wrapped in Docker to work on Amazon instances with minimal cost.
- Implemented some architectural patterns to make code less coupled and better testable.
- Integrated native libraries into an Android source set to be able to compile and debug it at runtime.
Technologies: MQTT, Firebase, Java, Android, IT Management, Android Studio, Android SDK, REST APIs, Kotlin, Native Mobile Apps, Google Play Store, SDKs, Third-party Integration, Streaming, Full-stack, Mobile App Development, Docker Compose, Jest, Agile Software Development, Bluetooth Low Energy (LE), Firebase Cloud Messaging (FCM), Mockito
Senior Android Engineer
2017 - 2017
Glomex
- Created and supported the Glomex media player SDK based on ExoPlayer and IMA.
- Built a video player prototype on React Native based on the JavaScript player used by the front end team.
- Improved the code test coverage by introducing a UI integration test for SDK.
- Developed a demo application for clients with SDK integration examples.
- Added ProGuard rules support to minify and obfuscate SDK code.
Technologies: JavaScript, React Native, Kotlin, Java, Android, Google Location API, Android Studio, Android SDK, Android TV, Software Architecture, Native Mobile Apps, Google Play Store, SDKs, Third-party Integration, Streaming, Full-stack, Mobile App Development, Jest, Agile Software Development, Mockito
Senior Android Engineer
2014 - 2017
Lebara
- Created and implemented from scratch the application design.
- Separated code into internally shared modules used by all mobile teams inside the company.
- Integrated the PJSIP library to support SIP calls with multiple encoders and decoders for streams.
- Integrated Tapjoy to increase application monetization.
- Performed several bug-fixing sprints to fix application FCs. There was only a 0.01% crash rate for users out of more than 350,000 active users.
Technologies: PJSIP, Java, Android, Android Studio, Android SDK, REST APIs, Native Mobile Apps, Google Play Store, Mobile App Development, Agile Software Development, Firebase Cloud Messaging (FCM), Mockito
Senior Android Developer | Team Leader
2013 - 2014
Yandex
- Performed R&D for new features like a collapsible Omnibox for the address bar.
- Improved the application startup performance from 25 to seven seconds.
- Managed the team and performed technical interviews.
- Made the UI be responsive by implementing animations for different user interactions.
- Optimized the UI performance to make the UI work flawlessly, even on low-end devices.
Technologies: Tools, Performance, HTML5 Animations, C++, Java, Android, IT Management, Android Studio, Android SDK, REST APIs, Leadership, Software Architecture, Native Mobile Apps, Technical Leadership, Team Management, Budget Management, Data Analysis, Google Play Store, SDKs, Third-party Integration, Mobile App Development, Certified ScrumMaster (CSM), Agile Software Development, Firebase Cloud Messaging (FCM), Mockito
Senior Android Engineer
2012 - 2013
Intego Group
- Converted the code into SDK to make integration into new applications easy, like writing few lines of code.
- Optimized the application performance and memory consumption profiling and improved the redraw rate from 10 FPS to 30 FPS.
- Created an MVP to demonstrate possible solutions at an exhibition.
- Supported three client applications in parallel to the company one.
Technologies: Profiling, Android, Architecture, Location Services, WiFi, Android Studio, Android SDK, REST APIs, Native Mobile Apps, Google Play Store, Mobile App Development, Agile Software Development, Mockito
Senior Android Developer | Team Leader
2010 - 2012
Layar
- Created several iterations of application with an improved AR experience.
- Converted native Android UI views into an OpenGL representation to emulate the portrait mode while the landscape was mandatory to work with the camera.
- Performed profiling to improve frames rate from 10 FPS to 35 FPS.
- Developed an MVP for the second project like Pokemon Go which has not gone live.
- Managed the Android development team and two projects.
Technologies: Profiling, Camera API, OpenGL, Augmented Reality (AR), Java, Android, IT Management, Android Studio, Android SDK, REST APIs, Leadership, Native Mobile Apps, Technical Leadership, Team Management, Image Recognition, Google Play Store, Computer Vision, Mobile App Development, Certified ScrumMaster (CSM), Agile Software Development
Software Engineer
2009 - 2010
Profix
- Created an internal bank transactions system with several routes and flows.
- Developed a testing platform for transaction flows coverage.
- Ensured 100% code coverage with unit and integration tests.
- Worked as an R&D engineer for new features, such as creating communication between branches within SOAP.
Technologies: SOAP, Unit Testing, Predictive Modeling, Third-party Integration
Software Engineer
2007 - 2008
Materialise
- Created an auto-testing module to simulate action from code by scenario.
- Developed an MVP application for 3D scanner hardware to scan tooth surfaces and represent them in realistic 3D models.
- Implemented a volume rendering feature to split the whole jaw 3D model into separate tooth and bone models.
Technologies: Visual Leak Detector (VLD), Boost, GDI(+), Standard Template Library (STL), Microsoft Foundation Classes (MFC), Microsoft Foundation Class (MFC) Library, Win32 API, C++
Experience
Petcube
https://play.google.com/store/apps/details?id=com.petcube.androidAn application to connect with the Petcube camera to watch, talk, and play a laser pointer game with your pet from a smartphone when you're not home.
There were multiple connection protocols used to work with Petcube devices, including WiFi and BLE.
There were multiple connection protocols used to work with Petcube devices, including WiFi and BLE.
Yandex Browser
https://play.google.com/store/apps/details?id=com.yandex.browserA browser based on the Chromium project with a Yandex services integration. It has unique features like a bottom-aligned Omnibox and beautiful tab switcher. It supports protection from Yandex and mobile data usage optimizations.
Layar
The world’s number 1 augmented reality app that enables users to get a new experience while reading articles or looking at physical objects through their phone camera. It includes image tracking with the ability to add text, audio, and video on tracked objects for content publishers.
ClearInspect
ClearInspect is a mobile property data collection app built to empower real estate professionals to create, work on, and submit property reports using only their mobile device. Sketch tools are included to simplify floor plan drawings.
PECS React Native Application
https://docs.google.com/document/d/1-Kfby_8lhqXtYTu9A4BtOeAuiKyac5EWxIDM49OihdU/edit?usp=sharingThis app is used as a communication system for nonverbal individuals and facilitates sentence creation and playback via TTS engines. It is based on the PECS system. At the moment, it has 300+ cards and can be easily expanded without having to republish the application.
Education
2003 - 2009
Bachelor of Science Degree in Applied System Analysis
National Technical University of Ukraine "Kyiv Polytechnic Institute" - Kyiv, Ukraine
Certifications
FEBRUARY 2011 - FEBRUARY 2013
Certified ScrumMaster
Scrum Alliance
Skills
Libraries/APIs
React, Retrofit 2, REST APIs, Joda-Time, Picasso, Google API, AMQP, RxJava 2, Google Location API, PJSIP, Win32 API, Microsoft Foundation Class (MFC) Library, Standard Template Library (STL), GDI(+), OpenGL, Camera API, Node.js, Microsoft Foundation Classes (MFC)
Tools
MQTT, Jenkins, GitHub, Git, Firebase Cloud Messaging (FCM), Android Studio, Expo, Claude Code, Codex, GitHub Copilot, AI SDK, Docker Compose, Android NDK, Slack, RxAndroid, Crashlytics, Xcode, AWS CodeDeploy, CircleCI
Languages
Java, Kotlin, GraphQL, JavaScript, Bash Script, TypeScript, Python, Swift, C++
Frameworks
Redux, Jest, React Native, Dagger 2, JUnit, Android SDK, PowerMock, Mockito, Espresso, Boost, Flutter
Paradigms
Clean Architecture, Cross-platform, Agile Software Development, Unit Testing, Scrum, Agile
Platforms
Android, Bluetooth Low Energy (LE), Android TV, Firebase, Backendless, AWS Lambda, Amazon EC2, Amazon Web Services (AWS), iOS, Docker, Linux, MacOS, Visual Studio Code (VS Code), Mobile
Storage
SQLite, Realm, Amazon S3 (AWS S3)
Other
MVP Design, Technical Leadership, IT Management, Location Services, Leadership, Native Mobile Apps, Computer Science, Team Management, AI Model Integration, Google Play Store, SDKs, Third-party Integration, ESP8266, Certified ScrumMaster (CSM), Room, System Architecture, WiFi, CTO, Software Architecture, Data Analysis, Image Recognition, Predictive Modeling, Budget Management, Cloudflare, Streaming, Full-stack, Computer Vision, Artificial Intelligence (AI), JetBrains IDE, HTML5 Animations, Performance, Tools, Architecture, Profiling, SOAP, Visual Leak Detector (VLD), Augmented Reality (AR), Internet of Things (IoT), WiFi Direct, Trading, Mobile App Development
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