georgeshajjar1996

Migrated entire backend from Node.js/Express to NestJS and database from MongoDB to PostgreSQL with Row-Level Security (RLS) for multi-tenant isolation and pgvector for vector search, reducing API response times by 40% Built the POS data sync pipeline handling ingestion, cleaning, normalization, and transformation of 100K+ retail records daily for AI consumption using Node.js Delivered 5 core AI modules in under 9 months: AI Chat (natural language queries via RAG + vector search), Smart Kiosk (in-store engagement and recommendations), Order History & Analytics (trend analysis and predictive insights), Customer Analytics (behavioral patterns and revenue trends), and Customer Personalization Profiles (AI-driven recommendations and targeted promotions) Leveraged AI development tools extensively to accelerate delivery, producing scalable, well-tested code at 3x faster velocity with Cypress and Jest test coverage Engineered full-stack features using React.js with Next.js on the front end and NestJS microservices on the back end, serving 50+ retail store clients Designed and implemented 20+ RESTful APIs and GraphQL endpoints connecting AI chatbot modules with inventory management and point-of-sale systems Integrated third-party AI and analytics services, including real-time data pipelines processing customer behavior insights across 500K+ transactions Optimized application performance, reducing page load times by 55% through code splitting, lazy loading, and Redis caching strategies Implemented CI/CD pipelines using Docker, GitHub Actions, and AWS (EC2, S3), reducing deployment cycles from 2 weeks to 2 days

Architected and developed front-end website infrastructure using React.js, Next.js, and Angular with TypeScript, delivering a seamless user experience across web and mobile platforms Built and maintained 15+ back-end services and RESTful APIs using Node.js and Express.js, supporting document management workflows for 500+ enterprise users Designed and optimized MongoDB and MySQL database schemas, improving query performance by 60% and ensuring data integrity across the platform Ensured cross-platform optimization and responsiveness, reducing mobile bounce rates by 35% through adaptive UI design and Tailwind CSS Led full project lifecycles from conception to deployment, coordinating with 4 cross-functional teams to meet both technical and business requirements Developed microservices architecture to modularize 8 application components, improving maintainability and reducing deployment time by 45% Collaborated with graphic designers and UX teams to implement pixel-perfect web design features, building a reusable component library used across 3 products Introduced modern tooling including Jest and Cypress testing suites, achieving 80% code coverage and reducing post-release bugs by 30%

Executed comprehensive manual and automated testing strategies across e-commerce platforms, identifying and documenting 200+ critical bugs before production releases Collaborated closely with the development team to triage, reproduce, and resolve defects, improving overall platform stability by 25% and user satisfaction scores Developed and maintained 300+ test cases and regression test suites using Cypress, ensuring consistent quality across platform updates Contributed to the implementation of QA processes and standards that reduced post-release defect rates by 40%