🇦🇹 Vienna, Austria
Pavlo Chernenko
Senior Android Developer
01. About
Who I am
I'm an Android developer with 12+ years of experience who genuinely loves the craft — from the first line of code to watching real users enjoy the finished product. I have a Computer Science background and have shipped everything from large-scale consumer apps with millions of users to security-critical systems and personal side projects. I'm equally comfortable diving deep into a complex codebase solo or collaborating closely with design, backend, and product teams. Fast, polished, reliable apps are what I aim for every time — if you're building something interesting, I'd love to be part of it.
02. Skills
Technical skills
Programming Languages
Android Frameworks & SDKs
Tools & Platforms
Other
03. Projects
Selected work
WienMobil (Ticket Shop)
WienMobil is the official mobility app of Wiener Linien, Vienna's public transport authority, downloaded over 3 million times. As Senior Android Developer at WienIT / Upstream Mobility, I led the complete redesign and implementation of the Ticket Shop feature — the app's core revenue driver — and spearheaded a full Jetpack Compose migration of the ticketing library. The app combines real-time public transport routing, in-app ticket purchase and validation, bike-sharing (WienMobil Rad), car-sharing (WienMobil Auto), and on-demand electric minibus (WienMobil Hüpfer), all unified in a single multimodal mobility platform.
Bikemap
Bikemap is the world's largest cycling app, connecting 11.7 million cyclists to over 16.8 million routes across 190+ countries. As Senior Android Developer at Bikemap GmbH, I led the development of new features, spearheaded the Wear OS companion app, and maintained the core navigation engine powered by Graphhopper. The app offers turn-by-turn voice navigation, offline maps, route planning with cycling-specific profiles (road bike, mountain bike, e-bike), real-time ride tracking, GPX import/export, and multi-device sync with Garmin and Wahoo hardware.
Smartlink+
Smartlink+ is a professional home security and smart home Android app developed for SecureNet Technologies (Alula), a US-based security platform used by thousands of alarm dealers. The app puts your security system in the palm of your hand — arm and disarm, view live camera feeds, control locks and lights, adjust your thermostat, and review system activity, all from one interface. As Android developer at SecureNet, I built core features including real-time video monitoring, multi-property management, and customisable sensor alerts. The same codebase powers a family of white-label apps for major security brands: Kept by SafeHome, GeoAlarm Security, NAPCO Prima, ADT Smart Connect, SafeHome Security, ADT Home, ShieldPro Home Security, and Top Tier Home.
SmartPosture
SmartPosture is a posture correction Android app that runs quietly in the background, monitoring how users hold their phone and reminding them to correct their position when they bend their neck too far forward — a habit commonly known as text neck. Developed at Scopic Software, the app features customisable alert styles (screen blur, vibration), a 14-day statistics dashboard, parental controls with PIN protection, and a Pro subscription with extended 30-day history, ad-free use, and global posture rankings. Rated 4.5 stars on Google Play with 250+ reviews.
LeverDays
LeverDays is a hobby web app that helps you squeeze the most out of your annual leave by strategically placing vacation days around public holidays and weekends. Select your country and region, enter the number of leave days you have, and the app instantly calculates the optimal placement — turning 25 days into 63 days off at a 2.5× leverage. A second 'Bridges' mode highlights single bridge days wedged between holidays and weekends, making it easy to spot quick long-weekend opportunities. Built with Next.js, TypeScript, and Tailwind CSS, featuring public holiday data for 50+ countries.
04. Experience
Work history
Freelance
Jan 2018 — Present
Android & Mobile Consultant
Freelance Consulting🌍 Remote
- ›Providing Android development and consulting services to clients across various industries.
- ›Offering strategic technological guidance and mobile app architecture decisions.
Full-time
Nov 2023 — Present
Senior Android Developer
WienIT / Upstream Mobility🇦🇹 Vienna, Austria
- ›Leading the redesign and implementation of the Ticket Shop feature for the WienMobil app, ensuring an intuitive and reliable user experience.
- ›Spearheading a complete refactor of the library using Jetpack Compose, establishing a robust and scalable architecture for long-term growth.
- ›Designing and defining the application architecture, laying a strong foundation for future feature expansions and performance optimisations.
- ›Improving test coverage across the app, increasing coverage from 0% to 80%, and embedding testing practices for sustained quality.
- ›Implementing automated code quality checks within the CI pipeline, promoting consistency and enhancing the development workflow.
- ›Stepping in as acting Team Lead as needed, providing mentorship and support to the team to ensure project alignment and success.
Mar 2020 — Oct 2023
Senior Android Developer
Bikemap GmbH🇦🇹 Vienna, Austria
- ›Taking the lead in implementing new features for the Bikemap App.
- ›Spearheading the development of the new Wear OS app, ensuring seamless integration with the existing ecosystem.
- ›Implementing and maintaining support for the latest Graphhopper library in the Android app, optimising performance and enhancing user experience.
- ›Conducting deep work on tracking and navigation mechanisms, refining accuracy and reliability.
- ›Maintaining CI processes, ensuring a streamlined and efficient development workflow.
- ›Successfully stepping in as Team Lead during absences, providing guidance and support to the development team.
Nov 2015 — Jul 2020
Android Developer
Scopic Software🌍 Remote
- ›Developed Android applications such as SmartPosture, PageMyCell, StocksToTrade, and others, taking ownership of key features and functionality.
- ›Played a significant role in React Native projects, contributing to the development of Android and iOS apps.
- ›Conducted technical interviews for new candidates, ensuring the selection of highly skilled developers.
- ›Managed multiple projects, overseeing their successful completion within deadlines.
Oct 2014 — Nov 2015
Software Developer
DEKRA🇺🇦 Kyiv, Ukraine
- ›Developed software solutions for financial institutions, adhering to high standards of quality and security.
- ›Worked on various Android projects, collaborating with cross-functional teams to deliver successful outcomes.
Oct 2013 — Nov 2014
Android Developer
Videoprobki🇺🇦 Kyiv, Ukraine
- ›Developed the Android application StreetVideoUA, showcasing strong technical skills and attention to detail.
05. Education
Academic background
Master's Degree
National Technical University of Ukraine 'Igor Sikorsky Kyiv Polytechnic Institute'
Specialised Computer Systems · Software Architecture · Embedded Systems
Bachelor's Degree
National Technical University of Ukraine 'Igor Sikorsky Kyiv Polytechnic Institute'
Computer Engineering · Algorithms · Data Structures · System Design
06. Languages
Language proficiency
07. Interests
Beyond the screen
Continuously learning and staying current with the Android ecosystem — whether it's a new Compose API, a Kotlin language feature, or a shift in architecture patterns. I enjoy going beyond tutorials and testing things in real projects.
Exploring new frameworks and technologies, especially AI and machine learning and how they can make mobile apps smarter and more personal. I'm particularly interested in on-device inference and privacy-respecting ML.
Passionate about human languages — I speak Ukrainian, English, German, French, and Spanish fluently and am currently working on Italian. Every language adds a new lens.
Enjoying strategic board games and puzzle-solving, from modern Eurogames to classic strategy titles. The long-term planning and reading-your-opponents aspects scratch the same itch as good software architecture.
Spending time outdoors — hiking mountain trails and long cycling routes around Vienna and the Alps. A good ride or hike clears the head better than anything else.
08. Contact
Get in touch
Open to new opportunities, consulting projects, and interesting conversations.