Haithm A.

BACKEND ENGINEER | Node.js Specialist | System Design I build production-ready backend systems that scale. With 4+ years of hands-on experience, I specialize in designing and implementing robust backend architectures using Node.js, Express, PostgreSQL, and Redis. I've shipped 2 production platforms currently serving real users in the e-commerce and real estate industries. WHAT I DO: Design scalable backend systems (databases, APIs, microservices) Optimize database performance (indexing, query optimization, JSONB filtering) Build real-time features (WebSockets, live notifications) Handle payments and transactions (atomicity, idempotency, security) Deploy to production (Docker, Linux, DevOps, monitoring) Implement authentication and authorization (JWT, RBAC, Redis caching) TECH STACK: Node.js, Express, TypeScript, PostgreSQL, Redis, WebSockets, Docker, Linux, REST APIs, Microservices, System Architecture, Payment Integration, Database Optimization PRODUCTION EXPERIENCE: E-Commerce Platform - Custom SMS payment integration, 100k+ products, 9-50ms response time, optimized memory usage Real Estate Marketplace - Real-time chat, geofencing, location-based search, 100k+ listings, 9-50ms response times VERIFIED RESULTS: 2 production platforms deployed and live 100k+ records optimized to 9-50ms queries Real-time systems handling 100+ concurrent users Zero financial transaction data loss Full production monitoring and maintenance WHY WORK WITH ME: Production experience - not tutorials, real shipped systems Performance-focused - I optimize for speed and scale Full ownership - I handle architecture, code, deployment, monitoring Problem solver - I research, test, and implement solutions Fast learner - Quick to pick up new tech and requirements Responsive - Clear communication, reliable delivery Let's talk about your project. I'm ready to contribute immediately.