01 / NexiBy LLClive
AI-powered smart link management and branded URL shortener SaaS
Lupofy ↗
An AI-powered SaaS for branded links, custom domains, subscription plans, and link intelligence—built for NexiBy LLC.
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Raihan Islam Miraj
Dhaka, Bangladesh · Since 2020Full Stack Developer · AI SaaS Product Engineer
I build AI-powered
SaaS products from
idea to production.
I work across the full stack, from AI features and multi-tenant architecture to payments and the details of a useful product. I like owning the whole journey.
Full Stack Developer at NexiBy LLCBuilding Dokaneasy · My own commerce SaaS
01 / Selected work
Selected work
Real products. Different problems.
Engineering from the interface to the infrastructure.
02 / Founder productIn development
Multi-tenant eCommerce SaaS
Dokaneasy ↗
My own multi-tenant commerce SaaS, designed so each business operates in an isolated workspace with its own storefront, domain, products, orders, and settings.
Engineering scope
- Tenant isolation and dynamic tenant routing
- Custom domains through Nginx reverse proxy
- Theme-based customizable storefront system
03 / clientlive
E-commerce platform
FabtrixBD ↗
A responsive commerce platform covering customer shopping flows and the operational tools behind products, orders, inventory, pricing, and access control.
Engineering scope
- Product browsing, cart, and checkout
- Order, product, category, customer, inventory, and pricing management
- Authentication and role-based access
04 / companylive
Marketplace subscription SaaS for car leasing
LeaseLocals ↗
A subscription marketplace serving customer, dealer, and admin workflows around vehicle lease listings and discovery.
Engineering scope
- Customer, dealer, and admin workflows
- Lease listing management, publishing, discovery, and filtering
- Stripe plans, access controls, and recurring payments
02 / Engineering capabilities
A broad stack. A product mindset.
The right tools depend on the problem. These are the systems, languages, and workflows I bring to the table.
01↗
Product engineering
From a product decision to the interface someone uses every day.
- JavaScript
- TypeScript
- React.js
- Next.js
- Tailwind CSS
02↗
AI systems
Useful intelligence, integrated into real product workflows.
- OpenAI APIs
- LangChain
- OpenAI Whisper
- AI content generation
- Semantic search
- Contextual chatbots
- AI-assisted workflows
03↗
Backend & APIs
The business logic and integrations behind the experience.
- Node.js
- Express.js
- PHP
- Laravel
- REST APIs
- Socket.IO
- OOP
04↗
Data & persistence
Data models that support how a product grows.
- PostgreSQL
- MySQL
- MongoDB
- Redis
- Prisma
05↗
SaaS & infrastructure
The systems that turn an application into a product.
- Stripe
- Subscriptions
- Multi-tenancy
- RBAC
- Team management
- Custom domains
- Nginx
- Docker
- AWS
- VPS deployment
- Firebase
- Third-party API integration
06↗
Beyond the core stack
Mobile interfaces and other programming languages I’ve worked with.
- React Native
- Expo
- Vue.js
- Python
- C
- C++
- Java
07↗
Tools & workflow
Design, implementation, debugging, and a willingness to learn the right tool for the problem.
- GitHub
- Figma
- Adobe Photoshop
- PHPStorm
- GitHub Copilot
- Cursor AI
- ChatGPT
- DeepSeek
- Firebase
- AWS
- VPS management
03 / Career & collaboration
Experience, with ownership.
Client work since 2020. Integration-heavy platforms. Cross-functional teams. Now, AI SaaS products.
SEP 2025 — PRESENT
NexiBy LLC Dhaka
Full Stack Developer
Building Lupofy, Kbixy, and Webwatchly. Full-stack product engineering with Next.js, React, Node.js, PostgreSQL, OpenAI, and Stripe.
APR 2023 — AUG 2025
Asian Group Italy Remote
Software Engineer
Travel agency systems, cargo management, e-commerce, flight booking, FlixBus ticketing, mobile recharge, bill payments, DHL integration, and automated cargo pricing.
SINCE 2020
Independent & client work
From custom websites to full-stack applications
WordPress plugins, themes and customization; PHP, Laravel, JavaScript, React, and custom client software.
04 / The journal
Notes from building.
Writing about SaaS architecture, AI integrations, and the engineering decisions behind useful products.
Why You Need Machine Learning
I'll create a modern, responsive blog about why you need machine learning using Tailwind CSS and open-source images from Unsplash.
Read article →05 / Beyond code
Away from the screen.
Music is the constant. The road brings a change of pace. There’s a little more to my life than what I ship.
Music, machines & open roads
Another side
of the same person.
11 years on guitar. 6 on keys. Singing, ukulele, and a recording setup. Motorcycle trips across Bangladesh, and time behind the wheel.
Explore beyond code ↗06 / Start a conversation
Let’s build,
create, or
talk shop.
AI SaaS teams are where I’m looking next. I’m also happy to swap musical ideas or talk bikes, cars, and the road.
rsnmiraj@gmail.com ↗+880 1797-482479Loading the contact form…