Tauhidur R.

Looking for a Senior Full-Stack JavaScript and TypeScript Engineer who leverages AI-native development workflows like Claude Code and Cursor to ship features three times faster? Or do you need to build intelligent AI features into your SaaS platform, Fintech tool, or Enterprise dashboard? I deliver scalable, high-performance web applications on time. With 7+ years of professional software engineering experience, I specialize in the end-to-end React and Node.js ecosystem. By combining senior-level architectural patterns with modern AI-assisted engineering, I help startup founders and enterprise product teams eliminate technical debt, optimize performance, and ship production-ready code with minimal hand-holding. 🛠️ AI-NATIVE DEVELOPMENT AND EXPERTISE * Agentic Engineering: Expert workflows utilizing Claude Code, Cursor, and Copilot tools to accelerate development, refactor legacy codebases, and hit tight deadlines without sacrificing quality. * AI Feature Integration: Integrating LLM APIs including Anthropic Claude and OpenAI, building RAG pipelines, managing vector embeddings, and setting up automated workflows. 🛠️ CORE ARCHITECTURE AND WHAT I BUILD * Full Stack Web Apps and MVPs: Scalable architectures built with React 18, Next.js, and Node.js. * Frontend Engineering: Next.js App Router for server-side rendering, clean state management with Zustand, Redux Toolkit, and React Query, plus pixel-perfect UI execution. * Backend Services and APIs: Production-grade REST or GraphQL API Architecture engineered using Node.js and NestJS. * Database Optimization: High-throughput data layouts utilizing PostgreSQL, MongoDB, PgBouncer, query indexing, and Redis caching. * Cloud Infrastructure and DevOps: Seamless deployments via AWS cloud systems (ECS, Lambda, CloudFront), Vercel infrastructure, Docker environments, and automated GitHub Actions pipelines. * Integrations and Security: Stripe Payments, secure OAuth 2.0 authentication frameworks, JWT tokens, role-based access control, and automation flows. * Mobile Development: Cross-platform mobile applications utilizing React Native or Flutter when required. 📈 PROVEN RESULTS FROM RECENT PROJECTS * SaaS Wealth Advisory Platform (Fintech Industry) * Delivered a SOC 2 and GDPR compliant multitenant SaaS system supporting 10,000+ concurrent users. * Achieved 99.9% uptime using NestJS, React, PostgreSQL, Redis, Docker, and GitHub Actions workflows. * Healthcare Management Systems (Government Hospitals) * Led the full-stack engineering and frontend architecture for major public hospital platforms. * Built a secure, highly maintainable interface using React 18, Next.js, NestJS, and TypeScript. * Open Banking Infrastructure Migration (Fintech Industry - UK) * Migrated legacy infrastructure to Next.js and TypeScript, fully complying with regional Open Banking standards. * Reduced technical debt by 40% and improved database performance by 40% via strategic query optimization, indexing, and PgBouncer connection pooling. 💡 WHY CLIENTS PREFER WORKING WITH ME * Hyper-Efficient Delivery: By integrating agentic coding tools into my daily workflow, I dramatically cut down debugging and scaffolding time, passing those cost and speed efficiencies directly to you. * Async-First Efficiency: Seamless collaboration across international time zones without communication gaps. * Absolute Transparency: I communicate clearly, flag engineering bottlenecks early, and focus on business outcomes. * High Reliability: Clean, well-documented code that prevents duplicate data entry and secures user data. If you are building a web application, scaling a software platform, or looking to inject AI capabilities into your tech stack, let's talk.