Production SaaS,AI-integrated.
Arefin Khan·Full-stack engineer·Dhaka, GMT+6
Who I am
Profile
About
I make APIs talk to each other. The kind of dev who'll wire Stripe, Google Calendar, and a custom EHR into one workflow without drama. Past 3 years: healthcare middleware for a US clinic, an 8-Google-API SaaS, and a live e-commerce platform for a Dubai brand. All live in production.
Core stack
Experience
3 rolesFreelance Full-Stack Developer
CurrentFreelance / Self-Employed
Shipping for clients in US, Dubai, and EU. Currently building Scents Orbit, a Dubai e-commerce platform with orders, delivery, wallets, and analytics on Django + React. Own products live: TaskNotch and ZyMerge.
Full-Stack Web Developer
QA Tek Solutions Inc
Owned the Django REST backend for internal ops tools used daily by 50+ staff. EMS income calculations, invoice automation, and scheduling. Worked alongside the frontend team on API contracts, sprint planning, and code reviews.
Frontend Developer (Intern)
SecureITLab
Bahrain
Featured projects
9 projectsNext.js 15
TaskNotch
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React 18
ZyMerge
Next.js 15
Aethorn
Next.js
CloudVault
What I build
8 servicesBug Fix & Audit
Got a stuck bug or slow page? I dig into the actual cause, fix it properly, and tell you why it broke so it doesn't come back.
Full SaaS Build
Most popularFrom idea to a live product people can pay for. Auth, payments, dashboard, hosting, all of it.
Landing Page or MVP
Test the idea before you build the whole thing. A landing page that actually converts, or a working MVP you can hand to real users.
MVP → Production
In demandHave a fragile MVP or an AI-generated app that breaks under real users? I rebuild it the right way. Real auth, error handling, performance, proper deploys.
AI Chatbot & RAG
TrendingA chatbot that actually knows your docs, products, or knowledge base. Vector search, streaming responses, embedded on your site.
Workflow Automation
Stop doing the same task 50 times a week. Custom flows that connect your tools, APIs, and AI models. Goes way past what Zapier can do.
Admin Dashboard
Internal tools and data panels your team actually opens, not the ones they ignore after week one.
Legacy Migration
Stuck on old tech? I move your codebase to something modern without breaking what already works.
What clients say
3 reviews"Technically skilled with structured approach." Connected EasyPractice, Whereby, Vena EHR, and Gravity Forms into one workflow. Booking creates a patient in the EHR, generates a video link, sends a screening, then AI drafts clinical notes after the call. Live in production.
Menokind Healthcare Integration
Upwork client · United States
5.0★ · Will hire again"Great experience working with Arefin." Rebuilt a site from scratch on a modern stack, shipped fast, and got hired again right after.
Repeat Client, Site Rebuild
Upwork client
5.0★ · Repeat hire"Positive attitude, excellent communication. Delivered perfectly." Audited and optimized a landing page in under 24 hours. Found the actual issues, fixed those, left the rest alone.
Same-Day Landing Audit
Upwork client
5.0★ · Delivered perfectlyCommon questions
7 answersQuick answers to save us both time.
These cover the questions clients ask most. If yours isn't here, email works. I reply within 24 hours.
Let's connect
Got a fragile MVP? Need APIs wired?
Arefin Khan
Replies within 24 hrs · GMT+6