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Alexander Kremenchuk

@alexanderkremenchuk

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I build scalable Flutter mobile platforms, white-label products, and real-time user experiences.

Croatia

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I've delivered mobile products from concept to production at DYO App, including a white-label iOS, Android, and web platform launched in two months. I architected a shared-codebase branding and flavors system supporting 15+ client variants and automated releases to cut preparation time from about 14 hours to 2.5 hours.

At Azulon Studios, I built real-time location tracking, messaging, and audio/video calling for a production platform serving approximately 15,000 monthly active users. I also implemented KYC and emergency-service access while improving rendering performance for an animation-heavy Flutter interface.

I've led Flutter architecture and delivery at Topizdato and built mobile features with Flutter and Swift at IT Promotion. I also independently designed, published, and marketed an iPhone and iPad game in Swift.

Experience

Work history, roles, and key accomplishments

Current

Mobile Engineer

Current

DYO APP

May 2025 - Present (1 year 4 months)

Delivered a white-label platform for iOS, Android, and Web from concept to production in 2 months. Architected a scalable branding and flavors system supporting 15+ client variants from a shared codebase.

iOS Android Web White Labeling CI CD app store Google Play Web Deployment Automation Email Automation Google Ads

Full-Stack Mobile Engineer

Azulon Studios

Apr 2026 - Sep 2026 (5 months)

Built real-time location tracking, messaging, and audio/video calling functionality. Implemented KYC verification and direct access to emergency services as core user safety features.

Flutter Real time Messaging Location Tracking Video and Audio Calls KYC Performance Optimization SVG Raster Thread Profiling

Lead Engineer

DYO APP

Nov 2024 - Apr 2025 (5 months)

Led an incremental migration toward a package-based architecture to improve modularity and scalability. Implemented CI/CD and automated deployments, reducing release preparation time from ~14 hours to ~2.5 hours.

Architecture Migration CI CD Automation Release Management White Label Config Landing Page Payment management

Flutter Developer

Topizdat

Mar 2022 - Oct 2024 (2 years 7 months)

Led Flutter development and owned the initial application architecture and core codebase. Established pull request rules, code review processes, and CI checks to support scalable team collaboration.

Flutter Architecture Code Review CI CD Refactoring Quality Gates Coordination

Mobile Developer

IT Promotion

Sep 2020 - Oct 2021 (1 year 1 month)

Developed mobile application interfaces and features using Flutter and Swift. Integrated REST APIs, AWS-backed services, Google Maps, and PayPro payment functionality handling ~2,000 transactions per hour.