Samsul Arefin
Samsul ArefinAvailable for hire
Software Engineer & Agentic AI Specialist

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.

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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

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Years Experience
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Projects Built
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Charity Drives Led
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Code Quality
SERVICES

Services That I Provide

Specialized solutions designed for high performance, exceptional user experiences, and scalable codebase architecture.

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
FEATURED WORK

My Recent Projects

Explore full-stack platforms, interactive SaaS applications, responsive e-commerce stores, and high-performance frontend interfaces.

TechnovaMartBD
Full-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 RESTPostgreSQL
SirajTech
Multi-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 Middleware
Koolaai (LLM Chat App)
Full-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 API
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 Design
The WK IT Company Site
Agency 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 CSS
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 Motion
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
TANSTACK QUERY LIVE API DATA

GitHub Activity & Repositories

@arefinMilen on GitHub

GitHub Contribution Calendar

Recently Updated Repositories

TECHNICAL SKILLS

Technologies & Mastery

Modern stack tools, backend APIs, DBMS architectures, and frontend design systems I work with daily.

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 Management & Back-end

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

Frameworks, Architectures & 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

Development Tools, DevOps & Testing

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

Experience, Education & Certifications

My career trajectory across full-stack engineering, agentic AI workflows, academic milestones, and professional credentials.

Work Experience

Associate Software Engineer

May 2026 - Present
AppifyDevsDhaka, Bangladesh (Fulltime – Onsite)

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

Front-end Engineer (Contract)

July 2025 - April 2026
The WK ITDhaka, Bangladesh (Remote)

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

Web Development Intern

Oct 2024 - April 2025
Nebulae Software SolutionDhaka, Bangladesh (Remote)

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

B.Sc in Computer Science & Engineering

2022 - Dec 2025
Daffodil International University3.51 / 4.00Dhaka, Bangladesh

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

H.S.C in Science

2017 - 2019
Cantonment Public School & CollegeGPA 5.00 / 5.00Saidpur, Bangladesh

Achieved GPA 5.00 out of 5.00 in HSC Science background.

S.S.C in Science

2015 - 2017
Sunflower School & CollegeGPA 5.00 / 5.00Saidpur, Bangladesh

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 Initiatives

Leading teams, organizing disaster relief network drives, and founding community non-profits.

Flood Relief Network - DIU

Fundraiser & Team Leader

August 2024 - September 2024 | 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 on Facebook

DIU Computer Programming Club (DIU CPC)

Associate Member

May 2022 - Dec 2023 | 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 on Facebook

OBPA (Non-Profit Organization)

Founder, Fundraiser & Event Organizer

October 2015 - Present | 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 on Facebook
GET IN TOUCH

Interested in Working Together? Let's Talk

Have a web app project, SaaS idea, frontend consultation, or internship opportunity? Drop me a message below.

Direct Contact & Scheduling

Instant Scheduling
Book 1-on-1 Google Meeting
Phone Number
+880 1783076970
Email Address
samsularefinmilen@gmail.com
Location
Dhaka, Bangladesh