Zharkynbek B.

I’m a mobile/full-stack engineer with 5+ years of experience building and maintaining production apps for iOS, Android, and web. My core stack is Flutter/Dart, Firebase, Supabase, Node.js/TypeScript, REST APIs, WebSockets, and Google Cloud. I can help with: • Flutter feature development and full app delivery • Firebase/Firestore, Cloud Functions, authentication, and storage • AI assistants, RAG pipelines, tool calling, and Vertex AI agents • App Store and Google Play releases, upgrades, and troubleshooting • CI/CD with GitHub Actions and Fastlane • Architecture reviews, debugging, performance, and production maintenance Selected results: • Led the development and launch of 9 production iOS and Android apps • Shipped a Flutter product across the App Store, Google Play, and web • Built an AI agent with Google ADK and deployed it to Vertex AI Agent Engine • Implemented RAG and Google Search grounding to improve answer accuracy • Built Firebase backends with Firestore and Cloud Functions I’m comfortable joining an existing codebase, working with a product team, and owning a feature from technical design through testing and release. Send me your product goals, current stack, and biggest blocker, and I’ll suggest a practical next step.