Alex Chen Senior Android Engineer

Lead Android engineer responsible for architecture decisions, feature development, and team mentorship. Drive technical roadmap for flagship consumer app with 10M+ downloads. Collaborate with product and design teams to deliver high-impact features on schedule.

SmartShop AI Shopping Assistant

• Conversational AI shopping assistant integrated into e-commerce app, enabling natural language product search, personalized recommendations, and order tracking through a hybrid retrieval and reranking system.
• MVVM with Clean Architecture, Kotlin Coroutines, Jetpack Compose, Room, Retrofit, Hilt DI
• Led end-to-end Android implementation including streaming UX for real-time AI responses, tool-state interfaces for multi-step actions, and human review flows for sensitive transactions. Implemented context/citation quality tracking and model routing with fallback strategies.
• Tech Stack: Kotlin Jetpack Compose AI SDK Integration RESTful APIs Offline-First Architecture Unit Testing MCP Integration
• Challenges: Streaming AI Response UX: Designed and implemented streaming text UI with proper loading states, interruption/retry mechanisms, and citation displays for AI-generated product recommendations, improving user engagement by 35%.
• Challenges: MCP Integration with Scoped Permissions: Built secure Model Context Protocol integration with granular permission scoping, enabling controlled access to user cart, order history, and preferences while maintaining audit trails.
• Challenges: AI-Assisted Feature Delivery: Leveraged Claude Code and GitHub Copilot for task decomposition, repository-context exploration, and test generation. Established human-supervised workflow with mandatory local validation, CI checks, code review, and rollback readiness, reducing feature delivery time by 25%.
• Challenges: Evaluation and Regression Testing: Created evaluation datasets for response quality, implemented automated regression testing for AI features, and built tracing/observability dashboards to monitor latency, cost, and user satisfaction metrics.

Developed and maintained multiple Android applications for clients across fintech and healthcare sectors. Focused on building robust, testable code and collaborating with cross-functional teams.

HealthTrack Patient Portal

• HIPAA-compliant patient portal for secure health record access, appointment scheduling, and telemedicine integration.
• MVP Architecture, Kotlin, RxJava, Dagger 2, Firebase, Retrofit, SQLite
• Implemented core features including secure authentication, offline data synchronization, and push notification system. Established CI/CD pipeline and code review practices.
• Tech Stack: Kotlin RxJava Firebase Cloud Messaging RESTful APIs Security Best Practices Unit Testing CI/CD
• Challenges: Offline-First Architecture: Designed robust offline-first data layer with conflict resolution, ensuring reliable access to critical health information regardless of network conditions.
• Challenges: Security Hardening: Implemented certificate pinning, encrypted local storage, and biometric authentication, passing third-party security audits with zero critical findings.