Стас Трачук

Flutter developer with experience building mobile and web apps in healthcare, AI, and consumer domains. I take features from idea to production, work confidently with complex architectures, performance optimization, and integrations. Delivered stable, reliable apps - including products used in clinical environments. Strong in communication, planning, and collaborating with cross-functional teams.

Flutter Developer at North South Tech (2026-02 – Present)

• Develop Flutter applications using gRPC for efficient client-server communication
• Integrated Firebase services
• Developed interactive mini-games using Flutter Flame
• Collaborated with Flutter developers and QA engineers in an agile team

Flutter Developer at Orangesoft (2025-06 – 2026-02)

• Implemented offline mode and synchronization
• Implemented tablet-optimized layouts and external display support (iPad, external monitors)
• Software development in compliance with HIPAA and GDPR
• Researched and evaluated data storage strategies for a medical application
• Consulted with surgeons and medical staff to make technical decisions
• Significantly improved application stability and performance - ensuring reliable operation during surgical procedures
• Improved rendering performance during instrument state updates by optimizing data formatting from the database to UI structures, raising FPS from ~40 FPS to a stable 60 FPS

Flutter Developer at Nirvana Apps (2024-07 – 2025-06)

11 months

• Developed complex animations and custom visual effects
• Closely collaborated with designer and backend developer
• Car Play integration
• Involved in API and design requirements planning
• Set up analytics, release process, and git-flow
• Improved app stability - increased the crash-free rate to 99%
• Conducted R&D on AI API integration and optimization
• Optimized token usage - reduced consumption from 77,000 to just 2000 tokens per request without any loss in model performance, significantly decreasing operational costs and speeding up processing

Flutter Developer at LYQX (2023-09 – 2024-07)

10 months

• Published apps to App Store / Google Play
• Worked with store rejections and successfully resolved compliance issues
• Developed mobile and web versions, integrated real-time chat
• Modularized shared logic and UI
• Planned architecture, integrated third-party services
• Conducted code review and refactoring
• Discussed and adjusted technical requirements
• Estimated and planned tasks
• Improved application security

Flutter Developer at KirnTech (2023-03 – 2023-09)

6 months

• Implemented a unified UI-kit used across the entire application, reducing duplicated code by 3× and enabling faster addition of new components
• Implemented modern navigation architecture and dependency injection
• Implemented application flavors for environment separation
• Added full light/dark theme support

– Kyiv National University of Construction and Architecture (2016 – 2019)