Hasan N.

AI-Powered Full-Stack Developer | React, Next.js, Node.js, Rails

I'm a full-stack developer building SaaS products, customer portals, and AI-powered platforms for founders and startups using Ruby on Rails, React, Next.js, Node.js, and modern LLM technologies. My core work includes Rails and Node.js backend development, React and Next.js frontend development, AI chatbot and AI agent development, RAG applications, and OpenAI, Claude, and Gemini integrations built to stay fast, maintainable, and easy to extend as your product grows. I take on three kinds of projects: - New SaaS products that need to launch clean the first time - Existing products that need AI capability added without a rewrite - Legacy applications that need modernizing without breaking what already works Not sure which architecture direction to take? I offer a free 15-minute call to map out your tech stack and approach no commitment, just help getting the roadmap right. Whatever stage you're at, send me the details, I'll give you a straight answer on whether it's a good fit. 𝐖𝐡𝐚𝐭 𝐈 𝐜𝐚𝐧 𝐡𝐞𝐥𝐩 𝐰𝐢𝐭𝐡: • AI-powered SaaS products • SaaS MVP development • AI chatbots and AI agents • OpenAI, Claude, and Gemini integrations • RAG applications and intelligent search • Customer portals and dashboards • Internal business tools • API integrations and workflow automation • Application performance and scalability improvements 𝐈’𝐦 𝐚 𝐠𝐫𝐞𝐚𝐭 𝐟𝐢𝐭 𝐢𝐟 𝐲𝐨𝐮 𝐧𝐞𝐞𝐝: ✅ 𝐄𝐧𝐝-𝐭𝐨-𝐞𝐧𝐝 𝐚𝐜𝐜𝐨𝐮𝐧𝐭𝐚𝐛𝐢𝐥𝐢𝐭𝐲: I own features completely, from initial concept down to deployment. ✅ 𝐏𝐫𝐨𝐚𝐜𝐭𝐢𝐯𝐞 𝐩𝐫𝐨𝐛𝐥𝐞𝐦-𝐬𝐨𝐥𝐯𝐢𝐧𝐠: I explore the options first, then build the right solution. ✅ 𝐈𝐧𝐝𝐞𝐩𝐞𝐧𝐝𝐞𝐧𝐭 𝐞𝐱𝐞𝐜𝐮𝐭𝐢𝐨𝐧: Someone who takes rough ideas and ships fast without daily guidance. ✅ 𝐒𝐨𝐥𝐢𝐝 𝐟𝐨𝐮𝐧𝐝𝐚𝐭𝐢𝐨𝐧𝐬: Clean, reliable systems built to handle real traffic smoothly. 𝐈’𝐦 𝐍𝐎𝐓 𝐚 𝐟𝐢𝐭 𝐢𝐟 𝐲𝐨𝐮’𝐫𝐞 𝐥𝐨𝐨𝐤𝐢𝐧𝐠 𝐟𝐨𝐫: ❌ 𝐉𝐮𝐬𝐭 𝐚𝐧 𝐨𝐫𝐝𝐞𝐫-𝐭𝐚𝐤𝐞𝐫: Someone who blindly follows specs without considering the bigger picture. ❌ 𝐋𝐨𝐰-𝐭𝐫𝐮𝐬𝐭 𝐦𝐚𝐧𝐚𝐠𝐞𝐦𝐞𝐧𝐭: Heavy hourly tracking instead of focusing on shipped results. ❌ 𝐒𝐡𝐨𝐫𝐭𝐬𝐢𝐠𝐡𝐭𝐞𝐝 𝐬𝐨𝐥𝐮𝐭𝐢𝐨𝐧𝐬: Quick workarounds that require a complete rebuild a few months later. 𝐖𝐡𝐲 𝐜𝐥𝐢𝐞𝐧𝐭𝐬 𝐰𝐨𝐫𝐤 𝐰𝐢𝐭𝐡 𝐦𝐞: ✔ 8+ years of software development experience ✔ 100+ projects delivered ✔ 100% Job Success on Upwork ✔ Top Rated Freelancer ✔ 5,000+ hours worked on Upwork ✔ Strong experience working directly with founders and product teams 𝐌𝐲 𝐜𝐨𝐫𝐞 𝐭𝐞𝐜𝐡𝐧𝐨𝐥𝐨𝐠𝐢𝐞𝐬 𝐢𝐧𝐜𝐥𝐮𝐝𝐞: Frontend: React.js, Next.js, TypeScript, JavaScript, Tailwind CSS Backend: Ruby on Rails, Node.js, Express.js, Python AI: OpenAI, Claude, Gemini, LangChain, AI Agents, RAG, Vector Search Database & Cloud: PostgreSQL, MongoDB, Redis, Supabase, Firebase, AWS, Docker, Vercel By using modern tools like Cursor and Claude Code, I am able to speed up my development process significantly. This helps me ship features quickly without cutting corners on code cleanliness or testing. If you're looking for a developer who can understand both the technical and product side of your business, I'd be happy to discuss your project. 📩 Hit me up with a message or invite, let's bring this build to life! ⚡