Question 1

What technologies does Refat Bhuyan specialise in?

Accepted Answer

Refat specialises in full-stack JavaScript: React, Next.js, Node.js, Express, and MongoDB (MERN stack). On the AI side he works with LangChain, OpenAI GPT-4o, RAG pipelines, and Pinecone. For cloud he deploys on AWS, Azure, GCP, and Vercel. He also builds MCP servers for AI agent tooling.

Question 2

Is Refat Bhuyan available for hire or freelance projects?

Accepted Answer

Yes. Refat is open to remote full-time roles, senior contract work (1–6 months), and founding engineer conversations for early-stage products. He works with clients in the UK, US, EU, UAE, Australia, and Singapore. His timezone (GMT+6) overlaps well with UAE (GMT+4), UK (GMT+0/+1), and Australian mornings.

Question 3

Can Refat Bhuyan build AI-powered applications using LangChain or OpenAI?

Accepted Answer

Yes. Refat has built production AI systems including a document-grounded customer support chatbot for a UK fintech client using LangChain, GPT-4o-mini, and a Pinecone vector store.

Question 4

Does Refat Bhuyan work with international clients remotely?

Accepted Answer

Yes. Refat has been working remotely with international clients for over two years, currently full-time with Cunard Consulting Ltd in the UK. He is available for overlap calls with UK and US timezones.

Question 5

What is Refat Bhuyan's typical project budget range?

Accepted Answer

Projects range from $500 for focused API integrations up to $5,000+ for full-stack SaaS builds. For ongoing retainer or contract work rates are discussed based on scope.

Question 6

Can Refat Bhuyan rescue an AI project that is broken or stuck?

Accepted Answer

Yes — AI project rescue is one of the most common requests Refat handles. Many clients built 70-80% of a product using tools like Cursor, Claude Code, or ChatGPT and then hit walls: broken RAG pipelines, LangChain hallucinations, apps that work locally but fail in production. Refat audits the codebase, identifies root causes, re-architects where needed, and ships a working, production-ready system. Most rescues are completed in 1–4 weeks.

Question 7

Does Refat Bhuyan build websites for small and local businesses?

Accepted Answer

Yes. Refat has helped local businesses — restaurants, retail shops, clinics, and service providers — launch and grow online. One example is EcoEats, a local food delivery business that grew from zero to over 150,000 customers after Refat built their full-stack platform with online ordering, SEO, and an AI-powered chatbot. Services include website builds, online booking/ordering systems, Google-optimised SEO, and 24/7 AI chatbots.

Question 8

What is context engineering and does Refat Bhuyan offer it?

Accepted Answer

Context engineering is the practice of designing the full information context provided to AI models — including system prompts, retrieval strategies, tool definitions, memory architecture, and conversation structure — to maximise AI reliability and performance. It goes far beyond basic prompt engineering. Refat applies context engineering when building RAG systems, AI agents, MCP servers, and LangChain-based applications. He is available for consulting and implementation.

Question 9

Can Refat Bhuyan fix or finish a half-built web application?

Accepted Answer

Yes. Project rescue — taking over incomplete, broken, or poorly built applications — is a core service. Refat performs a rapid code audit (usually within 48 hours), identifies the issues, proposes a fix plan, and executes it. He has rescued Next.js apps, Node.js APIs, React frontends, and AI integrations. A previous developer vanishing or going silent is a common starting point.

AI chatbot development.
LangChain · RAG · OpenAI.

What I build.

Customer Support Chatbot

Internal Knowledge Assistant

Sales Qualification Bot

Document Q&A System

Technology stack.

What's included in every project.

Remote service — worldwide.

Ready to build your AI chatbot?

AI chatbot development.LangChain · RAG · OpenAI.