Samsul Arefin
Samsul Arefin

I'M A

Software Engineer specializing in full-stack development (Next.js, TypeScript, Node.js) and Agentic AI workflows. Experienced in building autonomous AI integrations using Claude Agent, Antigravity, and Cursor AI with MCP tool calling and multi-LLM orchestration.

Book a MeetingExplore ProjectsCall
CORE STACK:Next.js App RouterTypeScriptClaude AgentPostgreSQLRedux ToolkitTanStack QueryFramer Motion
Samsul Arefin

Samsul Arefin

Software Engineer | Building Scalable Software & Custom AI Agents for 10x business growth

0+
Years Experience
0+
Projects Built
0+
Charity Drives Led
0%
Code Quality
SERVICES

Services & Capabilities

High-impact software engineering, custom AI agent integration, and modern web application development tailored for scaling businesses.

Web Development

Building scalable, high-performance web applications using modern full-stack technologies (Next.js App Router, React, TypeScript, and Node.js) with optimized state management and API integration.

Next.js 14 App Router
TypeScript & REST APIs
Responsive & Interactive UI
Performance & SEO Optimization
Request Service

Web Design

Designing visually stunning, mobile-first websites with rich aesthetics, glassmorphism, Framer Motion animations, and clean visual hierarchy tailored to convert visitors.

Custom Layout & UI/UX Design
Framer Motion & Smooth Animations
Tailwind CSS & Design Systems
Mobile-First Glassmorphism UI
Request Service

Database Development

Architecting robust database schemas, query optimizations, indexes, and server-side data pipelines for PostgreSQL and MongoDB backends.

PostgreSQL & MongoDB Schemas
ORM & ODM Integrations
Query Optimization & Indexing
Data Security & Role Access
Request Service

SaaS Development

Building full-stack SaaS platforms featuring automated subscription management, local MFS payment integration (bKash/Nagad), Edge Middleware RBAC security, and analytics.

Multi-Tenant & Role RBAC Dashboards
Subscription & Payment Gateways
Authentication & Automated JWT Refresh
S3 File Uploads & PDF/Excel Exports
Request Service

Custom Software Development

Engineered custom software platforms, backend microservices, third-party API integrations, and automated operational pipelines designed around specific business needs.

Custom Business Logic Architecture
API Gateways & Webhooks Integration
Zod Schema Validation & Security
Docker & Containerized Nginx Setup
Request Service

Custom AI Agents

Building autonomous AI workflows and intelligent agent services utilizing Claude Agent, Antigravity, MCP (Model Context Protocol) tool calling, and multi-LLM orchestration.

Claude Agent & Cursor AI Workflows
Model Context Protocol (MCP) Tooling
Multi-LLM Switchers (Gemini & ChatGPT)
Context Management & Prompt Engineering
Request Service

Web Development

Building scalable, high-performance web applications using modern full-stack technologies (Next.js App Router, React, TypeScript, and Node.js) with optimized state management and API integration.

Next.js 14 App Router
TypeScript & REST APIs
Responsive & Interactive UI
Performance & SEO Optimization
Request Service

Web Design

Designing visually stunning, mobile-first websites with rich aesthetics, glassmorphism, Framer Motion animations, and clean visual hierarchy tailored to convert visitors.

Custom Layout & UI/UX Design
Framer Motion & Smooth Animations
Tailwind CSS & Design Systems
Mobile-First Glassmorphism UI
Request Service

Database Development

Architecting robust database schemas, query optimizations, indexes, and server-side data pipelines for PostgreSQL and MongoDB backends.

PostgreSQL & MongoDB Schemas
ORM & ODM Integrations
Query Optimization & Indexing
Data Security & Role Access
Request Service

SaaS Development

Building full-stack SaaS platforms featuring automated subscription management, local MFS payment integration (bKash/Nagad), Edge Middleware RBAC security, and analytics.

Multi-Tenant & Role RBAC Dashboards
Subscription & Payment Gateways
Authentication & Automated JWT Refresh
S3 File Uploads & PDF/Excel Exports
Request Service

Custom Software Development

Engineered custom software platforms, backend microservices, third-party API integrations, and automated operational pipelines designed around specific business needs.

Custom Business Logic Architecture
API Gateways & Webhooks Integration
Zod Schema Validation & Security
Docker & Containerized Nginx Setup
Request Service

Custom AI Agents

Building autonomous AI workflows and intelligent agent services utilizing Claude Agent, Antigravity, MCP (Model Context Protocol) tool calling, and multi-LLM orchestration.

Claude Agent & Cursor AI Workflows
Model Context Protocol (MCP) Tooling
Multi-LLM Switchers (Gemini & ChatGPT)
Context Management & Prompt Engineering
Request Service

Web Development

Building scalable, high-performance web applications using modern full-stack technologies (Next.js App Router, React, TypeScript, and Node.js) with optimized state management and API integration.

Next.js 14 App Router
TypeScript & REST APIs
Responsive & Interactive UI
Performance & SEO Optimization
Request Service

Web Design

Designing visually stunning, mobile-first websites with rich aesthetics, glassmorphism, Framer Motion animations, and clean visual hierarchy tailored to convert visitors.

Custom Layout & UI/UX Design
Framer Motion & Smooth Animations
Tailwind CSS & Design Systems
Mobile-First Glassmorphism UI
Request Service

Database Development

Architecting robust database schemas, query optimizations, indexes, and server-side data pipelines for PostgreSQL and MongoDB backends.

PostgreSQL & MongoDB Schemas
ORM & ODM Integrations
Query Optimization & Indexing
Data Security & Role Access
Request Service

SaaS Development

Building full-stack SaaS platforms featuring automated subscription management, local MFS payment integration (bKash/Nagad), Edge Middleware RBAC security, and analytics.

Multi-Tenant & Role RBAC Dashboards
Subscription & Payment Gateways
Authentication & Automated JWT Refresh
S3 File Uploads & PDF/Excel Exports
Request Service

Custom Software Development

Engineered custom software platforms, backend microservices, third-party API integrations, and automated operational pipelines designed around specific business needs.

Custom Business Logic Architecture
API Gateways & Webhooks Integration
Zod Schema Validation & Security
Docker & Containerized Nginx Setup
Request Service

Custom AI Agents

Building autonomous AI workflows and intelligent agent services utilizing Claude Agent, Antigravity, MCP (Model Context Protocol) tool calling, and multi-LLM orchestration.

Claude Agent & Cursor AI Workflows
Model Context Protocol (MCP) Tooling
Multi-LLM Switchers (Gemini & ChatGPT)
Context Management & Prompt Engineering
Request Service

Web Development

Building scalable, high-performance web applications using modern full-stack technologies (Next.js App Router, React, TypeScript, and Node.js) with optimized state management and API integration.

Next.js 14 App Router
TypeScript & REST APIs
Responsive & Interactive UI
Performance & SEO Optimization
Request Service

Web Design

Designing visually stunning, mobile-first websites with rich aesthetics, glassmorphism, Framer Motion animations, and clean visual hierarchy tailored to convert visitors.

Custom Layout & UI/UX Design
Framer Motion & Smooth Animations
Tailwind CSS & Design Systems
Mobile-First Glassmorphism UI
Request Service

Database Development

Architecting robust database schemas, query optimizations, indexes, and server-side data pipelines for PostgreSQL and MongoDB backends.

PostgreSQL & MongoDB Schemas
ORM & ODM Integrations
Query Optimization & Indexing
Data Security & Role Access
Request Service

SaaS Development

Building full-stack SaaS platforms featuring automated subscription management, local MFS payment integration (bKash/Nagad), Edge Middleware RBAC security, and analytics.

Multi-Tenant & Role RBAC Dashboards
Subscription & Payment Gateways
Authentication & Automated JWT Refresh
S3 File Uploads & PDF/Excel Exports
Request Service

Custom Software Development

Engineered custom software platforms, backend microservices, third-party API integrations, and automated operational pipelines designed around specific business needs.

Custom Business Logic Architecture
API Gateways & Webhooks Integration
Zod Schema Validation & Security
Docker & Containerized Nginx Setup
Request Service

Custom AI Agents

Building autonomous AI workflows and intelligent agent services utilizing Claude Agent, Antigravity, MCP (Model Context Protocol) tool calling, and multi-LLM orchestration.

Claude Agent & Cursor AI Workflows
Model Context Protocol (MCP) Tooling
Multi-LLM Switchers (Gemini & ChatGPT)
Context Management & Prompt Engineering
Request Service
PROJECT PORTFOLIO

Featured Projects & Applications

Real-world full-stack web products, AI integrations, and high-performance software engineered with precision.

Roni Agro Fiber
Live in ProductionB2B E-Commerce & AgroTech

Roni Agro Fiber

Responsive B2B e-commerce platform showcasing Pineapple Leaf Fiber (PALF) products, processing pipeline, and export catalog across Desktop PC, Tablet, and Mobile devices.

Next.jsTypeScriptTailwind CSSReduxNode.jsREST APIsMongoDB
Read Case Study
Visit roniagrofiber.com
TechnovaMartBD
Live in ProductionFull-Stack E-Commerce

TechnovaMartBD

Full-stack gadget e-commerce platform using Next.js 14, Django REST Framework, PostgreSQL, and bKash/Nagad payment gateways with Dockerized Nginx deployment.

Next.js 14TypeScriptDjango RESTPostgreSQLZustandbKash MFSDockerNginx
Read Case Study
Visit technovamartbd.com
SirajTech
Live in ProductionMulti-Role Platform

SirajTech

Architected multi-role e-commerce platform with Next.js App Router, Edge Middleware for 3-role RBAC security, and Zod checkout validation.

Next.jsTypeScriptTailwind CSSEdge MiddlewareTanStack QueryZod
Read Case Study
Visit sirajtech.org
Koolaai (LLM Chat App)
Live in ProductionFull-Stack SaaS

Koolaai (LLM Chat App)

Built a full-stack SaaS platform unifying ChatGPT, Gemini, and custom image generation with multi-API backend & MFS payment integration.

Next.jsTypeScriptNode.jsOpenAI APIGemini APIMFS PaymentTailwind CSS
Read Case Study
Visit koolaai.tech
The WK IT Company Site
Live in ProductionAgency Platform

The WK IT Company Site

Built The WK IT official company website showcasing agency services, team members, and client booking with smooth Framer Motion animations.

ReactNext.jsFramer MotionTailwind CSSNode.js
Read Case Study
Visit thewkit.com
Node.js Developer Tools NPM Package
Live in ProductionNPM Package

Node.js Developer Tools NPM Package

Published production-grade Node.js/TypeScript developer package for backend validation, async request handling, and API microservice integration.

Node.jsTypeScriptNPM PackageREST APIsZod Validation
Read Case Study
Visit npmjs.com
Shop Plant
E-Commerce UI

Shop Plant

A modern, responsive landing page for a plant e-commerce store with clean aesthetic, category filters, and smooth mobile experience.

JavaScriptHTML5CSS3Responsive DesignBootstrap 5
Read Case Study
Live Demo
CyberSecure
EdTech Platform

CyberSecure

Cybersecurity course platform built with Next.js, React.js, and Tailwind CSS featuring dynamic course modules and dark mode aesthetic.

Next.jsReact.jsTailwind CSSFramer MotionTypeScript
Read Case Study
Live Demo
Quiz App
Interactive App

Quiz App

A web app for practicing general knowledge quizzes with instant score tracking, option feedback, and result summaries.

JavaScriptHTML5CSS3DOM Manipulation
Read Case Study
Live Demo
TANSTACK QUERY LIVE API DATA

GitHub Activity & Repositories

@arefinMilen on GitHub

GitHub Contribution Calendar

Recently Updated Repositories

LEETCODE PROBLEM SOLVING

Data Structures & Algorithms Activity

@arefin15-5279 on LeetCode

Difficulty Progress Breakdown

Easy38 Solved
Medium12 Solved
Hard0 Solved

Global Rank & Metrics

Global Ranking#185,240
Acceptance Rate64.5%
Reputation / Points340 pts

DSA Core Topics & Problem Solving Focus

LeetCode Profile: @arefin15-5279
Arrays & HashingTwo PointersSliding WindowBinary SearchTrees & GraphsDynamic ProgrammingRecursion & BacktrackingStack & Queues
TECHNICAL EXPERTISE

Technical Skills & Expertise

Comprehensive toolkit across full-stack engineering, AI agentic workflows, database architecture, and DevOps.

AI & Agentic Workflows

Proficient Stack
Claude Agent
Antigravity & Cursor AI
MCP Tool Calling
Multi-LLM Orchestration
Context & Prompt Eng.
Familiar Technologies
Agentic Workflows
Function Calling

Programming Languages

Proficient Stack
JavaScript (ES6+)
TypeScript
Node.js
Familiar Technologies
Python
Java
Dart
PHP
C / C++

Database & Backend

Proficient Stack
MongoDB
PostgreSQL
Express.js
Familiar Technologies
MySQL
Django REST

Frameworks & State

Proficient Stack
Next.js (App Router)
React.js
Tailwind CSS
TanStack Query
Redux Toolkit & Zustand
Zod & Validation
Framer Motion
Familiar Technologies
GSAP
Shadcn UI
Flutter

Tools & DevOps

Proficient Stack
Git & GitHub
Postman
Vercel
Familiar Technologies
Jest & Supertest
Docker & Nginx
GitHub Actions (CI/CD)
CAREER & EDUCATION

Experience & Education

My professional journey in software engineering, frontend architecture, and academic foundation.

Work Experience

May 2026 - PresentDhaka, Bangladesh (Fulltime – Onsite)

Associate Software Engineer

AppifyDevs

Spearheading frontend & full-stack features across scalable e-commerce platforms and workforce management systems utilizing Claude-Agents for rapid spec-to-test iteration.

Pelle Firenze — E-commerce Platform: Spearheading frontend development from scratch with RESTful backend integration and a performant UI.
Kraftize — Hotel Workforce Management: Delivered 30+ full-stack features (time-tracking, shift management, workforce analytics) using Claude-Agents. Engineered 5-role server-enforced RBAC, S3 document uploads, PDF/Excel exports, and cost analytics modules.
Next.jsTypeScriptNode.jsPostgreSQLClaude AgentS3PDF/Excel ExportZodREST APIs
July 2025 - April 2026Dhaka, Bangladesh (Remote)

Front-end Engineer (Contract)

The WK IT

Optimized Koolaai multi-LLM chat platform integrating ChatGPT & Gemini APIs with user authentication and subscription features. Streamlined corporate landing page.

Optimized Koolaai multi-LLM chat platform serving initial user base with subscriptions
Streamlined company landing page showcasing services and booking system
Next.jsTypeScriptTailwind CSSOpenAI APIGemini APIFramer Motion
Oct 2024 - April 2025Dhaka, Bangladesh (Remote)

Web Development Intern

Nebulae Software Solution

Optimized and deployed responsive web applications, practicing clean code architecture and version control.

Optimized and deployed 4 responsive web projects
Maintained clean code standards with Git version control and peer reviews
React.jsJavaScriptBootstrap 5CSS3Git

Education & Certifications

2022 - Dec 20253.51 / 4.00

B.Sc in Computer Science & Engineering

Daffodil International University

Specializing in Software Engineering, Full-Stack Architecture, Data Structures, Web Technologies, and Agentic AI Workflows.

2017 - 2019GPA 5.00 / 5.00

H.S.C in Science

Cantonment Public School & College

Achieved GPA 5.00 out of 5.00 in HSC Science background.

2015 - 2017GPA 5.00 / 5.00

S.S.C in Science

Sunflower School & College

Achieved GPA 5.00 out of 5.00 in SSC Science background.

Certifications & Credentials

Government & International Skill Recognition

Claude Code 101

Verify

Anthropic Education

Issued Aug 2026

Claude AgentAI Tool CallingPrompt EngineeringAnthropic Ecosystem

National Skills Certificate on Web Design and Development for Freelancing, Level-3

Verified

National Skills Development Authority (NSDA)

Issued Mar 2025 - Expires Mar 2030

Credential ID: NSC-ICT-WDDF-L3-001654
Web DesignFrontend DevelopmentWeb Standards

Master Git and Github - Beginner to Expert

Verified

Udemy

Issued Oct 2024

Credential ID: UC-61198f41-8a18-4c21-99d3-70d2036be531
GitGitHubVersion ControlBranching Strategies
COMMUNITY & IMPACT

Leadership & Social Impact

Guiding community initiatives, organizing relief networks, and contributing to tech organizations.

August 2024 - September 2024

Flood Relief Network - DIU

Fundraiser & Team Leader • Lakshmipur, Bangladesh

Led a 20-member volunteer team to manage emergency relief efforts in Lakshmipur
Raised 2 Lakh BDT in 7 days for flood relief support
Provided vital emergency aid and food packages to 200+ affected families
Learn More
May 2022 - Dec 2023

DIU Computer Programming Club (DIU CPC)

Associate Member • Dhaka, Bangladesh

Served as an associate member contributing to programming events and tech seminars
Volunteered in flagship programs including TAKE OFF and Unlock the Algorithm
Active participant in DIU CSE Fest 2022
Learn More
October 2015 - Present

OBPA (Non-Profit Organization)

Founder, Fundraiser & Event Organizer • Saidpur, Nilphamari, Bangladesh

Founded OBPA in 2015 and guided community-focused social welfare initiatives for 9+ years
Organized 10+ major charity events including winter clothing drives, student gifts, and disaster relief
Managed transparent fundraising and resource allocation to sustain ongoing community projects
Learn More
GET IN TOUCH

Get In Touch

Have a project in mind, need custom AI agent integration, or want to collaborate? Reach out today!

Contact Information

Instant Scheduling
Book Meeting
Phone Number
+880 1783076970
Email Address
samsularefinmilen@gmail.com
Location
Dhaka, Bangladesh