Bilal Javed

Led development of interactive content features using React Native and Expo, including user onboarding, media playback controls, and social sharing workflows. Defined testing and code review standards, introduced TDD with Jest and Supertest, set up CI/CD pipelines, and mentored engineers on quality practices across frontend and backend. Designed PostgreSQL data storage architecture (user accounts, content metadata, interaction logs, audit trails) with referential integrity and high-read performance using constraints and indexes. Led migration of a core content engine from a monolithic Django app to distributed Node.js/Express services, built an Expo-based mobile client for field reporters, and implemented Redis caching for session management and frequently accessed metadata. Reviewed pull requests across multiple teams, established a TypeScript style guide, and improved system reliability and scalability.

Built Node.js and Express services for user data storage, API integrations, and background processing using PostgreSQL and Redis. Designed PostgreSQL schemas for interactive story elements with query-performance optimization for high-read workloads while maintaining data integrity. Developed ingestion workflows integrating third-party APIs and storing structured metadata in PostgreSQL. Created testing processes with Jest and Pytest to improve reliability before deployment. Built and maintained a React Native mobile interface for authentication, content rendering, and offline synchronization; added Jest/Detox for critical paths. Improved recommendation performance by optimizing PostgreSQL queries and adding Redis caching, integrated Expo for OTA updates to reduce release cycles, and developed RESTful APIs for a support dashboard. Resolved production incidents (Express memory leaks) and refactored legacy JavaScript modules into TypeScript.

Introduced PostgreSQL schemas for interactive story assets and implemented partitioning strategies to manage high-write loads from user submissions and real-time updates. Added a mobile content ingestion service with Node.js and Express to handle media uploads, metadata validation, and storage coordination. Connected Expo-based clients with backend APIs, establishing REST endpoints for content retrieval, Redis caching layers, and automated test suites for critical flows. Integrated Google Analytics into reporting dashboards for interactive charts. Implemented real-time bidding logic in Express services to process high request volumes with low latency. Addressed cache invalidation bottlenecks to prevent cache stampedes during flash sales using staggered expirations.