Senior Software Engineer at Freelancing

Delivered end-to-end solutions across blockchain, backend, and full-stack systems for multiple clients, leading architecture and development of scalable, production-ready platforms. Specialized in building high-performance applications using Python, Node.js, and modern cloud-native infrastructure on AWS. Designed and launched a subscription-based fitness coaching platform with AI-powered plan generation, real-time communication, and multi-role management, alongside several SaaS platforms including a multi-tenant loyalty system and subscription-based services with secure payment integrations. Developed and audited smart contract systems across Ethereum and BSC, including token launch tooling, DeFi protocols inspired by Compound, and advanced trading integrations leveraging Uniswap, Flashbots, and real-time market data. Built automation tools and AI-driven agents enabling conversational trading and blockchain interactions. Architected robust backend systems using FastAPI, Django, and NestJS, implementing scalable microservices, real-time features, and secure authentication. Delivered additional solutions including financial data extraction platforms using OCR/LLM pipelines, real-time betting integrations, and interactive admin/configuration tools for mobile-first applications. Consistently led projects from concept to deployment, collaborating with cross-functional teams and independently delivering complex systems with strong focus on scalability, performance, and user experience.

Backend & Blockchain Engineer at Quantech Co.ltd

Led the design and development of scalable backend systems and blockchain solutions across fintech, AI, and Web3 domains. Built and deployed production-grade applications using Java, Python, Golang, and Node.js, leveraging cloud infrastructure on AWS and GCP with containerized, Kubernetes-based environments. Delivered a real estate fintech platform with a high-precision mortgage engine, optimized APIs, and interactive dashboards, alongside financial tooling for portfolio management, investment forecasting, and real-time analytics. Focused on performance, accuracy, and scalability across data-intensive systems. Architected AI-driven platforms for automated company profiling and due diligence, integrating data scraping, LLM-based summarization, and end-to-end workflow orchestration to generate structured, client-ready reports. Developed blockchain-based systems including NFT marketplaces, governance and voting smart contracts, and token-based ecosystems, ensuring secure and efficient on-chain/off-chain integration. Additionally implemented fraud detection mechanisms and anomaly detection models within fintech systems, enhancing transaction monitoring and platform security.