Sean Onuoha

Built Flutter applications with native Android/Kotlin integration featuring real-time video/voice calling (Agora RTC, WebRTC), on-device ML (Google ML Kit, Whisper API) for voice activity detection and speech-to-text across 99 languages, and custom call-flow architecture. Developed media pipelines with Camera2 API for video capture and custom controls, background audio recording to WAV, Firebase Storage with resumable TUS uploads, and WorkManager-based background processing for offline-first handling. Architected offline-first sync with Firebase/Supabase implementing real-time synchronization, local persistence (Room/Hive/SharedPreferences), RLS security policies, and cross-device data consistency for user profiles and progress tracking. Implemented Appium-based mobile automation tests to validate Flutter UI flows across Android and iOS.

Built offline-first Android features for EV management app with Room database persistence, background sync, and conflict-aware data merging for reliable operation in low-connectivity field environments. Integrated microservice REST APIs for real-time vehicle telemetry and fleet operations with robust error handling, retry logic, and request/response validation for production stability. Reduced QA overhead and deployment errors 60% implementing automated CI/CD pipelines with GitHub Actions/Fastlane, comprehensive testing strategies, and pre-deployment validation workflows. Established engineering best practices including technical documentation for API integrations, architecture decisions, and end-to-end testing protocols for QA and production environments.

Migrated legacy native apps (Kotlin/Swift) to Flutter bundling custom Android/iOS code as Flutter plugins and migrating React JS backoffice dashboard to Flutter web. Led agile planning and cross-functional sprint deliverables implementing test-driven workflows for unit/widget/integration testing ensuring code quality and maintainability. Automated CI/CD pipelines for QA and production releases reducing deployment errors and cycle time while resolving high-priority production issues improving app uptime. Customized native Flutter plugins in Kotlin/Swift for camera verification features and collaborated with QA team on backoffice management dashboard bug resolution. Produced detailed technical documentation and onboarding guides for developers ensuring maintainability and knowledge transfer across engineering teams. Resolved high-priority production bugs on backoffice management dashboard, improving app uptime and user satisfaction through systematic debugging and QA collaboration.