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I am a Flutter Engineer with over 5 years of experience building cross-platform applications primarily in the retail and e-commerce sectors. I specialize in developing custom POS and ERP systems with expertise in offline-first architecture and data synchronization, having supported over one million daily transactions and significantly reducing infrastructure costs. My work has improved application performance, shortened release cycles through automation, and helped scale backend systems to handle high transaction volumes. I also enjoy mentoring junior engineers and leading architectural redesigns to enhance product quality and team efficiency.…I am a Flutter Engineer with over 5 years of experience building cross-platform applications primarily in the retail and e-commerce sectors. I specialize in developing custom POS and ERP systems with expertise in offline-first architecture and data synchronization, having supported over one million daily transactions and significantly reducing infrastructure costs. My work has improved application performance, shortened release cycles through automation, and helped scale backend systems to handle high transaction volumes. I also enjoy mentoring junior engineers and leading architectural redesigns to enhance product quality and team efficiency.

Aiar Sien Diachkovskii

App Developer, Full Stack Developer, Back-End Developer, +2

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I am a Flutter Engineer with over 5 years of experience building cross-platform applications primarily in the retail and e-commerce sectors. I specialize in developing custom POS and ERP systems with expertise in offline-first architecture and data synchronization, having supported over one million daily transactions and significantly reducing infrastructure costs. My work has improved application performance, shortened release cycles through automation, and helped scale backend systems to handle high transaction volumes. I also enjoy mentoring junior engineers and leading architectural redesigns to enhance product quality and team efficiency.…I am a Flutter Engineer with over 5 years of experience building cross-platform applications primarily in the retail and e-commerce sectors. I specialize in developing custom POS and ERP systems with expertise in offline-first architecture and data synchronization, having supported over one million daily transactions and significantly reducing infrastructure costs. My work has improved application performance, shortened release cycles through automation, and helped scale backend systems to handle high transaction volumes. I also enjoy mentoring junior engineers and leading architectural redesigns to enhance product quality and team efficiency.

Available to hire

I am a Flutter Engineer with over 5 years of experience building cross-platform applications primarily in the retail and e-commerce sectors. I specialize in developing custom POS and ERP systems with expertise in offline-first architecture and data synchronization, having supported over one million daily transactions and significantly reducing infrastructure costs.

My work has improved application performance, shortened release cycles through automation, and helped scale backend systems to handle high transaction volumes. I also enjoy mentoring junior engineers and leading architectural redesigns to enhance product quality and team efficiency.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Work Experience

Software Engineer at Caspian Consulting Services

March 1, 2025 - August 14, 2025

Supported a global coffee retail chain with 200+ locations by developing a custom in-house POS/ERP system, saving $100K+ annually. Led migration from GetX to BLoC pattern across five Flutter projects, mentoring junior developers and establishing state management standards that reduced bugs by 35%. Engineered an offline-capable data synchronization system, improving field operations availability to 99.5%. Refactored architecture to reduce dependencies and improve performance by 25%. Optimized REST API data retrieval in Node.js to reduce server response by 35%. Integrated native iOS modules using SwiftUI and Method Channels to enhance video rendering times.

Software Engineer at UserStory

December 1, 2021 - August 14, 2025

Worked at a digital agency focused on e-commerce platforms and UX design, ensuring 95% unit and widget test coverage with 150+ tests. Reduced app load time by 40% via advanced code splitting and lazy loading. Designed scalable Flutter app architecture using BLoC and modular routing, supporting user growth from 12K to 15.6K monthly active users. Cut cold start time from 4.2s to 2.5s, improving retention by 12K monthly users. Implemented a widget library aligned with Figma designs achieving 98% UI accuracy and 40% reduction in rework. Integrated analytics and Firebase Cloud Messaging for enhanced engagement tracking.

Software Engineer at LLC Softway++

April 1, 2020 - August 14, 2025

Developed a Flutter mobile app driving 55% user growth across iOS and Android platforms. Architected a robust token-based authentication system to secure sensitive user data. Delivered a Flutter-based event management MVP featuring real-time attendance tracking and payment processing, securing the first eight corporate clients and laying the foundation for company growth. Integrated Stripe payments, QR check-ins, and RESTful APIs to reduce event registration times significantly from two minutes to 30 seconds.