Welcome to my portfolio!

Saifur Rahman Tamim

Full-Stack Developer_

I build scalable SaaS products end-to-end, from .NET and NestJS backends with multi-tenant database architecture, to containerized deployments with Docker. I design scalable schemas, write optimized queries, and build systems with a security-first mindset.

Let's work together

About

Saifur Rahman Tamim - Full-Stack Developer based in Dhaka

I'm Saifur Rahman Tamim, a Full-Stack Developer based in Dhaka with over 4 years of professional experience building production software. I specialize in designing and shipping SaaS products end-to-end — multi-tenant backend architecture, database design, API development, and containerized deployment.

My core stack includes C#/.NET, NestJS, TypeScript, PostgreSQL, MS SQL Server, and Redis, with Docker and Nginxhandling my deployment workflows. I've built everything from CRM platforms and multi-tenant inventory systems to e-learning platforms with encrypted video streaming, payment integrations, and examination engines. I design scalable database schemas, write optimized queries, and handle message queues with RabbitMQ and BullMQ. I currently maintain multiple Linux production servers hosting SaaS products, e-learning platforms, e-commerce sites, and more — alongside a Windows Server environment.

Technologies I've been working on

JavaScript ES6+ programming language
JavaScript (ES6+)
TypeScript programming language
TypeScript
React frontend library
React
Next.js fullstack React framework
Next.js
Node.js runtime environment
Node.js
NestJS backend framework
NestJS
.NET and C# development framework
.NET (C#)
PostgreSQL relational database
PostgreSQL
Microsoft SQL Server database
Microsoft SQL
Tailwind CSS utility framework
Tailwind CSS
Docker containerization platform
Docker
Nginx web server and reverse proxy
Nginx
Linux server administration
Linux
GitHub Actions CI/CD automation
GitHub Actions
Bash scripting language
Bash

Professional Experience

Jul 2023 - Mar 2025

Full time (Conditional)Mirpur DOHS, Dhaka, Bangladesh

Full Stack Developer

SaleBee CRM

Full stack developer experience on SaleBee CRM spanning ASP.NET MVC feature delivery, SQL Server heavy operations, deployment workflows, background services, and production reliability improvements.

  • ASP.NET MVC
  • Microsoft SQL Server
  • Entity Framework
  • jQuery
  • C#
  • .NET Core
View SaleBee CRM experience

Some Things I've Built

Commercial

Multi-Tenant Inventory SaaS

SaaS Product

BackendDatabase ArchitectureMulti-TenantDevOps

A production SaaS inventory system built with database-per-tenant architecture, serving multiple business clients on isolated PostgreSQL instances.

Next.jsNode.jsPostgreSQLPuppeteerDockerNginx
View Case Study

Commercial

E-Learning Platform

MediVerse

BackendDevOpsStreamingCross-Platform

A production e-learning platform with encrypted video streaming, queue-based media processing, push notifications, and cross-platform clients (web + Android + iOS) integrated with a NestJS backend.

Next.jsTailwindNestJSMongoDBRedisBullMQFFmpegHLS
View Case StudyVisit Project
E-Learning Platform

Practice Project

University Portal

Eduman

BackendDatabase DesignAI IntegrationServerless

A university portal featuring check-in based bus tracking with ETA calculation and a Gemini AI chatbot for student assistance.

Next.jsTailwindNestJSPostgreSQLTypeORMAWS LambdaGemini AI
View Case StudyVisit ProjectFrontend Code
View more works

Let's work together

If you need help with a frontend product, a full stack application, or a backend-driven platform that demands careful system design, business logic, and database-heavy workflows, let's continue the conversation on the contact page.

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