Md. Harun Or R.

🚀 I’m a Top 1% Upwork developer specializing in scalable SaaS applications designed to handle millions of requests, with a strong focus on solid architecture and production-ready foundations. 🏗️ With 5+ years of professional experience, I build reliable APIs, event-driven architectures, AWS cloud solutions, and AI-powered applications. I focus on getting the foundation right from day one and resolving bugs quickly without compromising code quality. What I bring to your project : • AWS Serverless Development: Lambda, API Gateway, SNS, SQS, DynamoDB, EventBridge, Step Functions, and S3. • Backend Engineering: Node.js, TypeScript, REST APIs, database design, authentication, and third-party integrations. • AWS Architecture: Serverless architecture, event-driven systems, scalability, performance optimization, and cost efficiency. • AI Integration: LLM integrations, AI agents, RAG, tool calling, and AI-powered automation workflows. • Cloud Infrastructure & CI/CD: AWS infrastructure, CloudFormation, infrastructure as code, GitHub Actions, and automated deployments. • Full-Stack Development: React and TypeScript for building responsive web applications when needed. Let's talk about what you're building.