Redwan Hasan Avik

Hi, I’m Redwan Hasan, a Computer Science undergraduate and Full Stack Developer passionate about building modern, scalable, secure, and high-performance web applications.

I work across the complete application lifecycle—from designing responsive user interfaces to developing backend APIs, managing databases, implementing authentication and caching, containerizing applications, and deploying production-ready systems.

My primary technology stack includes TypeScript,JavaScript, Next.js,React.js, Node.js, Express.js, PostgreSQL, Prisma ORM, Redis, Tailwind CSS, Docker, and Git.

I also have professional training in Ethical Hacking and Cyber Security, which gives me a security-focused approach to software development. I understand important web security concepts such as the OWASP Top 10, authentication, authorization, API security, input validation, secure application design, and common web vulnerabilities.

Technical Expertise

Frontend

• Next.js

• React.js

• TypeScript

• JavaScript (ES6+)

• HTML5 & CSS3

• Tailwind CSS

• Shadcn UI

• Radix UI

• Responsive Web Design

• React Hook Form

• Zod

Backend

• Node.js

• Express.js

• REST API Development

• JWT Access & Refresh Tokens

• Authentication & Authorization

• Role-Based Access Control

• Email Integration

• Payment Integration

Database:

• PostgreSQL

• MongoDB

• Prisma ORM

• Redis

DevOps & Deployment

• Docker

• Linux

• Nginx

• VPS Deployment

• Git & GitHub

• Vercel

• Cloudinary

• CI/CD

Security

• Ethical Hacking Fundamentals

• OWASP Top 10

• Web Application Security

• Secure API Development

• Authentication Security

• Secure Software Development Practices

Programming Languages

• TypeScript

• JavaScript

• Python

• C

• C++

Projects & Practical Experience

I continuously strengthen my software engineering skills by building practical applications and experimenting with production-oriented architecture.

Some of my projects include:

🛒 Uparzoo — Multi-Tenant E-Commerce SaaS Platform

A scalable multi-tenant e-commerce store-builder platform designed for merchants to create and manage their own online stores while providing centralized administration through a super-admin system.

The platform includes:

• Multi-tenant architecture with subdomain-based store routing

• Merchant dashboard for store, product, order, category, and customer management

• Super-admin dashboard for platform-wide management

• JWT-based authentication with access and refresh tokens

• Role-Based Access Control for admins, merchants, and customers

• Real-time communication using Socket.io

• Subscription and billing management

• Store configuration and customization

• Multiple industry-specific storefront templates

• Product, category, order, and customer management

• Analytics dashboards

• Store policies, payment gateway, social links, delivery, domain, and access-management modules

Tech: Next.js 16, TypeScript, Node.js, REST APIs, Tailwind CSS, Radix UI, React Hook Form, Zod, JWT, Socket.io, SWR, Axios, Recharts, Framer Motion & GSAP

This project has strengthened my understanding of multi-tenant SaaS architecture, RBAC, authentication middleware, scalable frontend architecture, real-time systems, and complex dashboard development.

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🏨 Fleetrip — Scalable Multi-Vendor Hotel Booking Platform

A full-stack hotel booking marketplace where travelers can discover and book properties while hosts independently manage their hotels, availability, and bookings.

The platform supports:

• User registration and hotel booking

• Multi-vendor / host property management

• Admin control panel

• Role-based authentication and authorization

• JWT access and refresh token authentication

• Real-time room availability management

• Secure online payments using Stripe

• Property image management with Cloudinary

• Email services using NodeMailer

• Google API integration

• Form validation using Zod and React Hook Form

• Secure password hashing using Bcrypt

Tech: Next.js, Node.js, Express.js, MongoDB, Tailwind CSS, Shadcn UI, Axios, React Hook Form, Zod, JWT, Bcrypt, Stripe, Cloudinary, NodeMailer & Google APIs

StayNest gave me practical experience building marketplace-style systems involving multiple user roles, booking workflows, payment processing, availability management, authentication, and third-party service integration.

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🚗 DriveFleet — Full-Stack Car Rental Platform

A modern car rental marketplace where users can browse and rent vehicles while vehicle owners can list and manage their own cars.

The application includes:

• Car listing and discovery

• Advanced search and filtering

• Vehicle detail pages

• User booking system

• Rental-duration-based automatic price calculation

• Booking status management

• Owner dashboard for adding, editing, and removing cars

• User booking management

• Email/password authentication

• Google OAuth authentication

• Protected routes

• Backend JWT synchronization

• Dark and light themes

• Responsive user interface

• Smooth animations and interactive UI

Tech: Next.js 16, React 19, Node.js, Express.js, MongoDB, Better Auth, JWT, Tailwind CSS 4, HeroUI, Framer Motion, Lottie & Vercel

DriveFleet helped me gain deeper practical experience with full-stack application architecture, authentication flows, REST API integration, owner/customer workflows, booking logic, and modern frontend engineering.

I also work with concepts such as Redis caching, LRU caching, Dockerized services, PostgreSQL databases, REST APIs, application security, CDN architecture, reverse proxies, VPS deployment, rate limiting, and scalable system design.

What I Focus On

I am particularly interested in building applications that are:

• Scalable

• Secure

• Maintainable

• High-performing

• Production-ready

• Architecturally clean

I enjoy learning how different parts of a software system interact—from the browser and API layer to databases, caching systems, containers, networking, and infrastructure.

Engineering Interests

Beyond feature development, I am particularly interested in understanding how production systems behave and scale.

My current areas of focus include:

• Full Stack Architecture

• System Design

• Scalable Backend Architecture

• API Design

• Authentication & Authorization

• Database Architecture

• Redis & Application Caching

• Multi-Tenant SaaS Architecture

• Real-Time Applications

• Dockerized Deployments

• Reverse Proxies & Nginx

• CDN Architecture

• Rate Limiting

• Performance Optimization

• Application Security

• Cloud & VPS Infrastructure

I enjoy understanding the entire request lifecycle—from a user interaction in the browser through the frontend, API, authentication layer, cache, database, and infrastructure behind the application.

Career Direction

My goal is to grow as a Full Stack Software Engineer, contributing to real-world products that require strong engineering practices, scalability, security, and maintainable architecture.

I am particularly interested in opportunities involving Full Stack Development, Backend Engineering, SaaS Products, System Design, Cloud Infrastructure, and Application Security.

Long term, I aim to become a Software Engineer and System Architect, capable of designing and engineering reliable, secure, scalable, and high-performance distributed systems.

I’m open to connecting with software engineers, engineering teams, startups, and technology organizations where I can contribute to meaningful products, solve challenging engineering problems, and continue developing as an engineer.