I build scalable web applications, AI-powered products, and backend systems that solve real business problems.
With 6+ years of experience, I specialize in designing modern full-stack applications using React, Next.js, Node.js, TypeScript, PostgreSQL, and AWS while integrating LLMs and automation into production software.
- 🤖 Build AI-powered SaaS applications
- ⚡ Design scalable backend architectures & REST APIs
- 🏗️ Develop enterprise-grade web platforms
- 🔄 Automate business workflows using LLMs
- ☁️ Deploy cloud-native applications with Docker & AWS
- 📈 Optimize performance, scalability, and developer experience
React.js • Next.js • Angular • TypeScript • JavaScript • Tailwind CSS • Flutter
Node.js • Express.js • NestJS • REST APIs • GraphQL • WebSockets • Microservices
PostgreSQL • MongoDB • Prisma ORM • Redis • SQL
OpenAI API • AI Chatbots • OCR • Prompt Engineering • Workflow Automation • RAG
AWS • Docker • GitHub Actions • CI/CD • Nginx • Linux
OCR + LLM-powered document extraction, search, and automation.
Enterprise grocery ecosystem with rewards, admin panel, delivery management, and Flutter app.
Multi-tenant marketplace for hemp & cannabis businesses built with React, NestJS, PostgreSQL, and AWS.
Production-ready fashion e-commerce platform with Next.js, Cloudflare R2, Supabase, and SEO optimization.
- AI Agents
- OpenAI Integrations
- SaaS Architecture
- Microservices
- System Design
- High-performance Backend Development
🌍 Portfolio: https://nirajkumar.in
💼 LinkedIn: https://linkedin.com/in/niraj-kumar-dev
📧 Email: me@nirajkumar.in
"Great software isn't just about writing code—it's about solving real business problems with scalable engineering."