Production SaaS,AI-integrated.
Arefin Khan·Full-stack engineer·Dhaka
Who I am
Profile
I make APIs talk to each other. I'll wire Stripe, Google Calendar, and a custom EHR into one workflow without drama. Over the past three years, I've shipped healthcare middleware for a US clinic, an eight-API SaaS platform, and a live e-commerce system for a Dubai brand.
Core stack
3+
Years
40+
Projects
5
Countries
Currently
Experience
4 rolesFreelance Full-Stack Developer
CurrentSelf-Employed
- Built full-stack web apps with Next.js, Node.js, Django, and PostgreSQL for clients across US, UK, and Middle East.
- Delivered SaaS platforms, API integrations, and dashboards, managing full lifecycle from requirements to deployment.
Full Stack Web Developer
NextGen Digitech Ltd.
- Built Django REST backend services and React dashboards for EMS (income), LMS (training), and STMS (student) systems for US-based clients, delivering features end-to-end.
- Automated income-calculation workflows with Django, cutting manual work by 80%.
- Built invoice scheduling saving 40+ hours per month.
Junior Full Stack Web Developer
NextGen Digitech Ltd. (for QA Tek Solutions)
- Built full-stack features with Django, React, Node.js, TypeScript, and PostgreSQL.
- Converted static content into admin-driven modules via Django admin and custom endpoints, improving update speed by 70%.
Frontend Developer
SecureITLab
- Built React.js UIs with reusable components and REST API integration for admin dashboards and client-facing sites.
- Collaborated with backend developers to wire up APIs, improving data flow and reducing UI bugs through cleaner component design.
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
5 reviews“Arefin delivered the agreed technical scope and implemented complex integrations across booking, screening, EHR, video, and AI components. Technically skilled, structured, and capable.”
Maria T.
Healthcare Middleware
5.0★ · Will hire again“Great experience working with Arefin. Rebuilt our site from scratch, shipped fast, and came back for a second project right after.”
Kurt L.
Website Recreation
5.0★ · Repeat hire“Extremely satisfied with Arefin's work. The project was delivered perfectly and precisely on time. Positive attitude and excellent communication throughout.”
Moudy A.
Landing Page Review
5.0★ · Delivered perfectly“Arefin did a good job completing the project successfully. He was fast to answer, and I could ask for his professional help in other matters too.”
Sara Y.
Website Development
5.0★ · Fast & reliable“Quick turnaround, great communication. Will hire again!”
Kurt L.
Website Recreation
5.0★ · Quick turnaroundCommon 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