Hi, I'm Dorian S. — a Senior Full-Stack & Backend Engineer and AI Integrator with 7+ years of experience designing, building, and scaling high-performance systems across web, mobile, and cloud environments. I help businesses transform ideas into reliable, secure, and scalable platforms by combining strong backend engineering, clean architecture, and intelligent automation. From API-driven microservices to AI-powered dashboards and enterprise SaaS apps, I deliver solutions built for long-term success. ✅ Backend Engineering (My Core Strength) Robust, scalable backends using: - Node.js, NestJS, Express - Python, Django, FastAPI, Flask - Laravel / PHP - Microservices architecture - Authentication, RBAC, multi-tenant systems - Real-time APIs (WebSockets, event-driven architecture) - REST, GraphQL, gRPC - Databases & Systems Engineering - Optimized data workflows with: - PostgreSQL, MySQL, MongoDB - Elasticsearch, Redis, RabbitMQ, Kafka - Database design, indexing, performance tuning - Data pipelines & ETL orchestration ✅ AI & Automation Seamless integration of AI and automation in production apps: - OpenAI / GPT integration - AI dashboards using Streamlit & Dash - NLP pipelines, embeddings, RAG systems - Automated data processing (Pandas, NumPy) - Predictive workflows and recommendation engines ✅ Full-Stack Development - Clean, maintainable UI on top of a strong backend: - React.js, Next.js, Vue.js, Angular - React Native & Flutter (cross-platform apps) - Component-driven UI engineering - High-performance client–server integration ✅ Cloud & DevOps Production-grade deployment and automation: - Docker, Docker Compose, Kubernetes - CI/CD pipelines (GitHub Actions, GitLab, Azure DevOps) - AWS, Azure, Firebase - Monitoring, logging, and scaling strategies 🚀 Project Highlights - SaaS Analytics Platform – Angular + Django + PostgreSQL with real-time metrics and multi-tenant architecture - AI Inventory Dashboard – MERN + OpenAI + Streamlit, including CSV/GeoJSON exports and map visualizations - Multi-Vendor Marketplace – React + Laravel + MySQL with scalable catalog and advanced search - Real Estate Platform – Next.js + FastAPI + Elasticsearch + dynamic geolocation features - Enterprise Microservices Migration – NestJS + Docker + Azure, CI/CD pipelines, and API gateway integration ✅ Why Clients Work With Me - I design systems that scale—reliably, securely, and efficiently - I bring senior-level clarity to complex technical challenges - I communicate proactively and deliver consistently - I align engineering decisions with business goals - I build solutions that stand the test of time Let’s build something powerful—whether it’s a backend system, AI engine, or full-stack platform with enterprise-grade reliability.