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Mobile software engineer specializing in Flutter and React Native for iOS and Android, with an offline-first architecture, real-time data synchronization (AWS AppSync, WebSockets), biometric authentication, and native module development in Swift and Kotlin. Proven track record delivering scalable mobile systems with secure REST APIs, CI/CD, and cloud deployments on Azure and AWS. Experience includes building and shipping production-grade offline-first apps, implementing reliable sync/reconciliation and crash/UI performance improvements, authoring native iOS/Android modules, and delivering automated CI/CD and cloud infrastructure workflows. Also holds relevant community/learning achievements and API/network monitoring related development projects.…Mobile software engineer specializing in Flutter and React Native for iOS and Android, with an offline-first architecture, real-time data synchronization (AWS AppSync, WebSockets), biometric authentication, and native module development in Swift and Kotlin. Proven track record delivering scalable mobile systems with secure REST APIs, CI/CD, and cloud deployments on Azure and AWS. Experience includes building and shipping production-grade offline-first apps, implementing reliable sync/reconciliation and crash/UI performance improvements, authoring native iOS/Android modules, and delivering automated CI/CD and cloud infrastructure workflows. Also holds relevant community/learning achievements and API/network monitoring related development projects.

Subash Jayasinghe

App Developer, Back-End Developer, Front-End Developer, +3

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Mobile software engineer specializing in Flutter and React Native for iOS and Android, with an offline-first architecture, real-time data synchronization (AWS AppSync, WebSockets), biometric authentication, and native module development in Swift and Kotlin. Proven track record delivering scalable mobile systems with secure REST APIs, CI/CD, and cloud deployments on Azure and AWS. Experience includes building and shipping production-grade offline-first apps, implementing reliable sync/reconciliation and crash/UI performance improvements, authoring native iOS/Android modules, and delivering automated CI/CD and cloud infrastructure workflows. Also holds relevant community/learning achievements and API/network monitoring related development projects.…Mobile software engineer specializing in Flutter and React Native for iOS and Android, with an offline-first architecture, real-time data synchronization (AWS AppSync, WebSockets), biometric authentication, and native module development in Swift and Kotlin. Proven track record delivering scalable mobile systems with secure REST APIs, CI/CD, and cloud deployments on Azure and AWS. Experience includes building and shipping production-grade offline-first apps, implementing reliable sync/reconciliation and crash/UI performance improvements, authoring native iOS/Android modules, and delivering automated CI/CD and cloud infrastructure workflows. Also holds relevant community/learning achievements and API/network monitoring related development projects.

Available to hire

Mobile software engineer specializing in Flutter and React Native for iOS and Android, with an offline-first architecture, real-time data synchronization (AWS AppSync, WebSockets), biometric authentication, and native module development in Swift and Kotlin. Proven track record delivering scalable mobile systems with secure REST APIs, CI/CD, and cloud deployments on Azure and AWS.

Experience includes building and shipping production-grade offline-first apps, implementing reliable sync/reconciliation and crash/UI performance improvements, authoring native iOS/Android modules, and delivering automated CI/CD and cloud infrastructure workflows. Also holds relevant community/learning achievements and API/network monitoring related development projects.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Language

English

Fluent

Sinhala, Sinhalese

Intermediate

Work Experience

Mobile Engineer at Majstro.io

July 1, 2025 - Present

Built and delivered scalable mobile systems using Flutter and React Native. Implemented offline-first architecture with real-time data synchronization via AWS AppSync (GraphQL subscriptions) and queued offline delta sync using AppSync mutations reconciled on reconnection. Persisted data locally with SQLite/Hive and maintained background sync to reduce data loss. Designed authenticated REST API workflows to cut manual record handling and improved reliability by using custom sync packages with retry/reconciliation logic. Implemented real-time event ranch sorting event tracking features and authored native Swift/Kotlin modules bridged to Flutter, including dynamic island/live activities and lock screen widgets. Optimized UI performance (reduced UI lag/drop frames) via Flutter/Riverpod state optimizations and improved event score visibility latency from ~30s to under 5s. Added Apple Watch companion features for live leaderboards/alerts. Delivered secure biometric authentication and secure

Mobile Engineer at Maestro.io

July 1, 2025 - Present

Leading mobile development for iOS and Android using Flutter and React Native; specializing in offline-first architecture, real-time data synchronization (AWS AppSync, WebSockets), biometric authentication, and native module development in Swift and Kotlin. Proficient in BLoC and Riverpod state management, CI/CD pipelines, and cloud deployments on Azure and AWS.

Mobile Engineer at Background Audio Playback App (US Client)

January 1, 2025 - April 30, 2025

Built native modules for Android audio focus and iOS AVAudioSession control to enable stable background playback. Developed local audio caching achieving ~99% playback timing accuracy across device state transitions, supporting reliable workout/background listening experiences.

Mobile Engineer at Secure Biometric Healthcare Platform (US Client)

January 1, 2025 - April 30, 2025

Implemented a secure biometric login system reducing sign-in time from ~20 seconds to under 3 seconds. Built AES-encrypted API communication and secure storage, reducing authentication errors by ~90%. Integrated chatbot and membership features with session validation and privacy handling. Developed encrypted and secure healthcare platform functionality for a US client and implemented supporting secure flows.

Mobile Developer (Contract) at Prodigit.in

January 1, 2025 - April 1, 2025

Built and maintained 3 production Flutter apps using clean architecture and BLoC state management. Integrated real-time GPS tracking for delivery services, reducing location update delay to 5 seconds. Improved app stability through profiling, crash analysis, and modular coder/refactor. Implemented CI/CD pipelines (GitHub Actions + Fastlane) and OTA updates using ShoreBird for iOS/Android.