Open to opportunities

Sivasankar User

@sivasankaruser

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Flutter developer with 4 years building performance-critical offline-first apps.

India

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What I'm looking for

I’m looking for a team where I can own Flutter products end-to-end—shipping scalable, offline-first experiences, real-time features, and performance-critical apps with fast OTA hotfixes and strong engineering practices.

I’m a Flutter Developer with 4 years of experience, progressing from intern to lead at Coinone Global Solutions. I’ve owned multi-year production systems end-to-end—architecture through performance optimization and release—shipping high-impact apps to Google Play Store and Apple App Store.

I build scalable, JSON-driven dynamic UI systems (150+ configurations) and real-time chat features with pagination and optimized backend sync. I also deliver enterprise-grade offline-first workflows, cost-optimized Firebase usage, native integrations via platform channels (including thermal printers), and rapid hotfix deployment using Shorebird OTA updates—while mentoring teams through code reviews and strong architecture standards.

Experience

Work history, roles, and key accomplishments

Flutter Developer (Lead)

Coinone Global Solutions

Jan 2022 - Jan 2026 (4 years)

Delivered production-grade Flutter applications for US, UK, Saudi Arabia, and Qatar, replacing manual and legacy workflows with multi-application ecosystems (Customer Apps, CRM, Internal Tools). Architected scalable, JSON-driven dynamic UIs (150+ configurations), built offline-first workflows, implemented real-time chat with optimized backend sync, and managed Play Store/App Store releases includi

Flutter Dart BLoC Storage Analytics Offline First Chat Shorebird OTA Updates