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🚀 Senior AI & Full-Stack Engineer | Production-Ready AI SaaS I help startups, SaaS founders, and growing businesses transform ideas into production-ready AI applications. I build complete products-from architecture and backend development to AI integration, frontend implementation, deployment, and long-term scalability. My focus is on delivering real business solutions, not prototypes. Whether you need an AI-powered SaaS platform, an intelligent automation system, or a full-stack web application, I can take your project from concept to production. 🔧 Recent Projects Insurance-AI Built an AI-powered insurance platform featuring intelligent document analysis, automated policy workflows, quote generation, and claim processing. X-Laptop Modern e-commerce platform for laptop shopping with product filtering, order management, and user profiles. React.js + Express.js + MongoDB. 💼 What I Build AI-powered SaaS applications LLM integrations (OpenAI, Claude, Gemini) RAG systems and knowledge assistants AI chatbots and intelligent automation Document analysis and OCR workflows AI image generation platforms Shopify applications and e-commerce solutions REST & GraphQL APIs Admin dashboards Payment systems and subscription platforms Full-stack web applications Cloud-ready backend architectures ⚙️ Core Technologies Backend: NestJS · Express · FastAPI · Django · TypeScript · Node.js · Python Frontend: Next.js · React · React Native · Tailwind · TypeScript AI/LLM: Claude API · Gemini · OpenAI · RAG · LangChain · Embeddings · Vector Search · Prompt Engineering Database: PostgreSQL · Supabase · Redis · TypeORM · Prisma Payments & Auth: Stripe · Google OAuth · JWT · Clerk E-commerce: Shopify API (REST + GraphQL) · Shopify App Development · Meta Ads API · Google Ads API Infra & DevOps: Docker · Railway · AWS (S3, EC2) · Nginx · BullMQ · CI/CD Media: FFmpeg · Image processing pipelines 🤝 What You Can Expect ✅ End-to-end ownership-from planning and architecture to deployment ✅ Production-quality code that is clean, maintainable, and well-documented ✅ Clear communication with regular progress updates ✅ Scalable solutions designed for long-term growth ✅ Business-focused development that prioritizes reliability, performance, and user experience

🔹 What I build I build production backend systems that handle real-time distributed traffic at scale using Golang, Python and Node.js. I focus on systems where latency, reliability, and throughput directly impact production outcomes under high concurrency and event-driven workloads. I design and implement blockchain integration layers that connect backend systems with Ethereum-based transaction and wallet workflows in production environments. 🔹 Production impact Focused on building production-grade systems that improve reliability, throughput, and system resilience under real-world traffic conditions. Built real-time backend systems using Go, Node.js, and Python with Redis Pub/Sub and SSE for high-volume event-driven communication Designed and stabilized high-throughput API systems and microservice architectures under concurrent production traffic Developed blockchain transaction and wallet integration systems using Node.js and Ethereum-based stacks in production environments Implemented smart contract interaction layers and backend services for token and transaction workflows Built payment and external API integration systems with strong consistency, idempotency, and failure recovery requirements Operated cloud backend systems on AWS/GCP with scaling, monitoring, and production observability 🔹 Core engineering focus Distributed backend systems (Go / Node.js / Python) Event-driven architecture (Redis Pub/Sub, SSE) Blockchain transaction systems (Ethereum / Web3 integration) Backend ↔ on-chain data flow design High-concurrency API systems Production reliability, scalability, and latency optimization 🔹 How I work I identify bottlenecks in production systems across latency, throughput, and data consistency. I implement changes that improve system stability and performance across backend and blockchain layers without disrupting production traffic. 🔹 Availability Available for backend architecture, blockchain integration, system scaling, and production refactoring projects.

Dear Viewer, “Without big data analytics, companies are blind and deaf, wandering out onto the web like deer on a freeway.” (Geoffrey Moore, author and consultant) I'll help you getting High Quality, Accurate Data that'll add value to your business. I'm well verse in Python and C/C++. My area of expertise are web scraping/crawling, data interpretation, data scraping, data analysis and data structures. I am a freelancer on full-time so you can expect results within few hours depending on the project. I have developed software solutions to crawl and extract different types of data from various websites, e.g. social networking sites, e-commerce, business listings and other related data sources. If you decide to work with me you can expect a high level of dedication and passion in the project we do together. I will try hard to adapt my knowledge and experience to your needs and I will always put a special emphasis on a creative solution. I have scraped data from websites that require parsing JavaScript/AJAX and Login Secured. I've rich experience in avoiding IP blocking with Proxy server and have scraped big data on a server like AWS, DigitalOcean. I can provide scraped data in whatever format is required: csv, json, MySQL, PostgreSQL, NoSQL (mongoDB), txt. Looking forward to working with you soon. Thanks

I am a professional Full-stack Developer with proven experience in enterprise-level finance, retail, and manufacturing systems. I specialize in building reliable solutions that deliver real business impact. ✅ Core Banking (Application Architecture) ✅ ERP & SCM ✅ API ✅ Cloud & Infra (AWS Certified Developer, Docker, CI/CD pipelines) ✅ DB: Oracle, MSSQL, MariaDB, MongoDB (SQL & NoSQL optimization) ✅ Java(Spring), Python, Node, js etc. ✅ Server Optimization ✅ Writing(English & Korean) With strong communication skills and global project experience, I ensure quality, reliability, and client satisfaction in every delivery.

I am a Full Stack Developer & DevOps Engineer with a strong foundation in the MERN stack and extensive experience working with both SQL (MariaDB, ClickHouse) and NoSQL databases. I specialize in building scalable, high-performance web applications with expertise in backend architectures, frontend development, and real-time communication systems. My experience includes designing NestJS monorepos, implementing GraphQL APIs, developing batch processing systems, and creating web crawling modules. I have a deep understanding of authentication mechanisms, encryption techniques, and real-time data processing, ensuring robust and secure applications. On the DevOps side, I am proficient in Docker, PM2, AWS, Nginx, Grafana, and Prometheus, allowing me to optimize infrastructure for reliability, scalability, and performance. My ability to manage CI/CD pipelines, automate deployments, and monitor system health has contributed to reducing downtime and improving efficiency. I have strong expertise in frontend development, specializing in React, Next.js to build dynamic, responsive, and highly performant user interfaces. My experience includes managing complex state logic with Redux Toolkit and Zustand, optimizing UI performance, and implementing modular, reusable components for scalability. I excel at integrating RESTful and GraphQL APIs, ensuring seamless data flow between frontend and backend systems. With a deep understanding of UI/UX principles, I focus on creating intuitive, visually appealing, and accessible web applications that enhance user engagement and experience. I am always eager to learn and adapt to emerging technologies, staying ahead in the ever-evolving software landscape. My passion lies in building efficient, scalable architectures and delivering innovative, user-focused solutions.