Hi, I’mMd. Siyam HasanBackend Developer & Automation Builder
I build reliable backend APIs, database-driven products and AI automation workflows — and ship them with clean, fast Next.js frontends.
- Studying
- IPE @ BUTEX
- Focus
- Backend + Automation
- Based in
- Dhaka, BD
Services I Offer
From a single API endpoint to a complete product — here’s how I can help your project move faster.
Backend & API Development
Secure, well-structured REST APIs with Node.js and Express that your frontend and mobile apps can rely on.
- Authentication & role-based access
- Validation, rate limiting & error handling
- File uploads, payments & admin panels
Database Design
MongoDB and PostgreSQL schemas designed for clean queries, fast reads and room to grow.
- Schema modelling & indexing
- Data migration planning
- Reporting-friendly structures
AI & Workflow Automation
n8n workflows, LLM integrations and RAG pipelines that remove repetitive manual work from your business.
- Content generation & auto-publishing
- Google Sheets & API integrations
- Document Q&A with RAG
Full-Stack Delivery
Fast, responsive, SEO-ready Next.js and Tailwind frontends connected to the API I build for you.
- Next.js App Router & SEO
- Mobile-first responsive UI
- Deployment & handover docs
Skills & Technologies
The tools I use every day — and the ones I’m still learning, labelled honestly.
- Daily use
Node.js
REST APIs, authentication, file uploads and middleware-driven backend services.
Backend
- Daily use
Express.js
Modular routing, JWT/session auth and hardened APIs with helmet and rate limiting.
Backend
- Daily use
MongoDB
Mongoose schema design, indexing and document-oriented data modelling.
Database
- Learning
PostgreSQL
Learning relational schema design and SQL; planning to move a product backend to Neon (Postgres).
Database
- Comfortable
Next.js
App Router, SSR/SSG and SEO-friendly URL structures.
Frontend
- Comfortable
React
Component architecture, hooks and state management with Redux Toolkit or Zustand.
Frontend
- Comfortable
Tailwind CSS
Mobile-first, responsive interfaces with a consistent design system.
Frontend
- Daily use
n8n Automation
Content generation and publishing workflows with Google Sheets and AI API integrations.
Automation & AI
- Comfortable
RAG & LLM APIs
Document Q&A systems built with LangChain, Gemini embeddings and Pinecone.
Automation & AI
- Daily use
Git & GitHub
Branch-based workflow, clean commit history and pull requests.
Tools
Featured Projects
What I’ve built and what I’m building — each with the problem it solves.
- In development
SaaS · Notes marketplace
StudyVaultBD
A peer-to-peer notes and resource-sharing platform for SSC, HSC, admission and university students in Bangladesh. Freemium model with a role-based admin panel; SSLCommerz payments are planned.
- Google sign-in and email/password with cookie-session auth
- Free and premium PDFs in separate Google Drive folders via Multer
- SEO-friendly URLs like /notes/hsc/physics/chapter-3
- Next.js
- Tailwind CSS
- Node.js
- MongoDB
- Zustand
- Completed
AI · Retrieval-Augmented Generation
Jarvis — RAG Pipeline
A RAG system that answers questions over your own documents. Retrieval accuracy was improved by tuning the chunking strategy.
- Gemini embeddings (3072-dim) with a Pinecone vector database
- OpenAI-compatible gateway running gpt-4o-mini
- Fixed wrong-chunk retrieval by adjusting the chunking strategy
- LangChain
- Gemini
- Pinecone
- Node.js
- Completed
Automation · n8n workflows
AI Content Automation
End-to-end automation that generates Bengali AI storytelling content and publishes it to Facebook — split into separate scene-generator and publisher workflows.
- Google Sheets used as the content queue
- Low-cost AI gateway — roughly $0.00025 per post
- Separate generator and publisher workflows for easier debugging and scaling
- n8n
- Gemini
- Google Sheets
- Facebook API
- Paused
MERN · Full-stack
Vingo — Food Delivery App
A MERN food-delivery app with customer, owner and delivery roles — a hands-on project for solving real-world auth and state-management problems.
- Google OAuth with Passport.js and role-based access
- Redux Toolkit state management and SSLCommerz payments
- Debugged cookie sameSite, Redux state mismatches and role enum errors
- React
- Redux Toolkit
- Express
- MongoDB
- SSLCommerz
Have a project in mind?
Tell me what you’re building — an API, an automation or a full product — and I’ll get back to you within 24 hours.
Contact Md. Siyam Hasan
For projects, freelance work or collaboration — reach out any way you like. I usually reply within 24 hours.
Fastest way to reach me
siyamhasan10462@gmail.com
Md. Siyam Hasan