Volodymyr – BLoC, Dart, Flutter

A construction workforce management platform that uses geolocation and NFC-based door access to support workforce tracking, site access control, and compliance with GDPR data protection requirements.

• Built the proof of concept and took it to a production app as the sole technical owner.
• Defined the Flutter architecture and dependencies.
• Implemented features and native integrations.
• Managed the full release process.
• Delivered a multi-tenant SaaS app with user login, multiple organisations and push notifications connected to the platform backend.
• Implemented NFC door access including HCE, geofencing and background location with native modules and Android Keystore.
• Owned production support, ensuring geofencing accuracy and NFC access reliability for on-site construction workers.
• Coordinated API requirements with web developers, design, product and QA stakeholders.
• Gave regular demos to the client.
• Used AI-assisted development with Cursor and Claude Code.

A bus ticketing platform with an integrated loyalty program that enables passengers to purchase tickets and earn rewards for their travel.

• Built and maintained ticketing and loyalty features for apps serving more than 1 million and 0.5 million users.
• Integrated Google Pay and Apple Pay.
• Used Android Keystore.
• Migrated the local database from Realm to Drift.
• Integrated deep linking and migrated the entire app to GoRouter in production.
• Implemented serverless, region-specific notifications history for Firebase Messaging campaigns with Cloud Firestore.
• Built a Flutter desktop companion app for administering Firebase Messaging campaigns.
• Maintained 99% crash-free users and 99% crash-free sessions across Ecolines, Autolux and Tracksite.

A taxi booking platform that connects passengers with drivers and simplifies ride booking and transportation management.

• Served as the sole technical owner of the mobile app.
• Designed the Flutter architecture and chose the core dependencies.
• Integrated Stripe payments.
• Built WebSocket-based real-time updates using Centrifuge.
• Mentored a junior developer and reviewed their code.
• Worked with backend and design teams and filled gaps in the product's business logic.
• Led end-to-end release management to the App Store and Google Play.
• Used AI-assisted development with Cursor and Claude Code.

A social discovery platform that connects people with new acquaintances, hangouts, and public events based on their interests, preferences, location, and personality, helping users find relevant social opportunities and build connections.

• Maintained and developed the product in production.
• Mentored engineers and performed code review.
• Implemented deep links and deferred links with AppsFlyer.
• Optimized the app and fixed async session refresh issues.

An e-commerce platform that combines gamification features with a streamlined checkout process and delivery tracking system to enhance customer engagement and simplify the shopping experience.

• Owned the app's technical direction.
• Set up the Flutter project structure.
• Picked the core packages.
• Mentored a junior developer through code review.
• Implemented Google and Apple sign-in and deferred referral links.
• Worked closely with backend, frontend and design teams to deliver features.
• Ran the full release cycle from build to store publication.