Available for Backend & Full Stack Roles

Backend Engineer
Building Reliable APIs
& Scalable Systems.

Specializing in Node.js, TypeScript, Express, NestJS, and PostgreSQL. Engineering robust RESTful architectures, database schemas, and background job pipelines with production reliability.

View Projects GitHub Resume

Core Stack:

Node.js

TypeScript

NestJS

PostgreSQL

Redis

Docker

MongoDB

src/routes/order.route.ts

import express, { Request, Response, NextFunction } from 'express';

import { authenticate, authorize } from '../middleware/auth';

import { orderQueue } from '../queues/order.queue';

const router = express.Router();

// Async order processing with BullMQ & idempotency

router.post(

'/api/v1/orders',

authenticate,

authorize(['customer']),

async (req: Request, res: Response, next: NextFunction) => {

try {

const { items, paymentMethodId } = req.body;

const job = await orderQueue.add('process-order', {

userId: req.user.id,

items,

paymentMethodId,

}, { attempts: 3, backoff: { type: 'exponential', delay: 1000 } });

return res.status(202).json({

status: 'accepted',

jobId: job.id,

});

} catch (err) {

next(err);

}

);

export default router;

Engineering Proof

Work & Production Systems

Showcase of personal engineering architectures, live production e-commerce & ticketing contributions, and reusable internal platforms.

View All Projects

Featured Engineering Projects

Showcase Architectures

Engineering ProjectAI / Automation

AI Controller

52-module TypeScript automation platform with multi-repo AI planning, transactional Git, and 48+ Telegram operations.

52-module TypeScript backend architecture running 18 AI-driven development workflows

Multi-repository AI planning engine with transactional Git operations and automated rollback/recovery

Node.jsTypeScriptExpress.jsTelegram Bot APIClaude Code+3

Case Study

GitHub

Engineering ProjectBackend

Multi-Vendor E-Commerce API Engine

Modular REST backend with multi-role RBAC, inventory concurrency control, and idempotent webhook payment pipelines.

Role-Based Access Control (RBAC) separating Admin, Vendor, and Customer permission scopes

Optimistic locking and atomic operations on cart checkouts to eliminate inventory race conditions

Node.jsExpress.jsMongoDBRedisStripe+3

Case Study

GitHub

Engineering ProjectBackend

Playfantasy365

Fantasy sports backend services powering live tournament scoring, leaderboards, and scheduled match ingestion for 33K+ users.

Backend architecture supporting fantasy tournaments and automated scoring calculations for 33K+ users

Fantasy sports API integrations ingesting real-time fixture feeds and player performance statistics

Node.jsExpress.jsMongoDBNext.jsNode-Cron+2

Case Study

Production System (33K+ Users)

Selected Production Systems

Contributed In Production

Production SystemBackend

Strides Co — Production E-Commerce

Contributed to backend development and production workflows for a high-usage fashion e-commerce platform.

Contributed to backend API development and production workflows for high-usage e-commerce operations

Implemented and maintained order-related business logic and catalog management workflows

Node.jsExpress.jsREST APIsDatabase WorkflowsAuth+1

Case Study

Visit Website

Production SystemBackend

BongOz Films — Movie Ticketing

Contributed to ticketing workflows including dynamic seat selection, seat locking, payments, discounts, and promo codes.

Contributed to dynamic seat selection and temporary seat locking logic to prevent double bookings

Integrated Stripe payment workflows with backend verification prior to ticket issuance

Node.jsExpress.jsMongoDBStripeREST APIs+2

Case Study

Visit Website

Production SystemFull Stack

Emerald Restaurant Management

Multi-branch restaurant backend managing menu availability, live branch operations, and admin reporting.

Backend REST APIs managing multi-branch restaurant ordering workflows and branch-specific menus

Real-time item availability tracking and menu customization across locations

Next.jsNode.jsExpress.jsMongoDBOAuth+2

Case Study

Client Production System

Internal Reusable Platform

Modular Engineering

Internal PlatformBackend

Reusable Admin CMS Platform

Reusable internal administrative portal platform designed for modular CRUD workflows, RBAC, user management, and shared API integration patterns.

Architected reusable backend modules for rapid provisioning of project-specific admin portals

Standardized Role-Based Access Control (RBAC) supporting granular permission scopes across user tiers

Node.jsExpress.jsMongoDBRBACREST APIs+3

Case Study

Internal Engineering Platform

Explore Full Project Catalogue

Career Progression

Production Experience

Track record of building APIs, managing databases, and shipping backend systems.

2026

GCB HoldingCurrent Role

Backend Developer

May 2026 – Present

Developing and maintaining production backend APIs, relational MySQL database workflows, authentication, and third-party integrations.

Developed and maintained backend APIs using Node.js and Express.js for production applications.
Worked with MySQL for database design, queries, data management, and backend workflows.
Implemented business logic, authentication, and third-party API integrations.
Contributed to production development, debugging, deployment, and ongoing system maintenance.

Node.jsExpress.jsTypeScriptMySQLREST APIsAuthentication

2024

Antopolis

Full Stack Developer (Backend Focused)

Feb 2024 – Apr 2026

Contributed to backend development across production e-commerce, ticketing, and internal management platforms.

Developed and maintained production-grade REST APIs using Node.js and Express.js.
Designed and optimized MongoDB schemas for high-volume applications and business workflows.
Implemented JWT authentication, role-based access control, and third-party API integrations.
Integrated Stripe and SSLCommerz payment workflows and supported production transaction flows.
Deployed and maintained applications using Docker, Nginx, Linux VPS, and DigitalOcean.

Node.jsExpress.jsMongoDBJWTRBACStripeSSLCommerzDockerNginxLinux VPS

Tech Stack

Engineering Stack

Production-focused toolkit for building reliable APIs, distributed storage pipelines, and resilient backend systems.

Backend Core

Primary Specialization

Node.js

TypeScript

Express.js

NestJS

Databases & Storage

PostgreSQL

MongoDB

MySQL

Redis

Prisma

DevOps & Tools

Docker

Linux

Nginx

Git

GitHub

Frontend

Next.js

React

Tailwind CSS

Open to Remote

Taijul Islam

Backend Engineer

Dhaka, Bangladesh

Engineering Profile

Engineering with a focus on
Reliability, Data Integrity & Clean APIs.

I am a Backend Developer with hands-on production experience in the Node.js and TypeScript ecosystem. My core work revolves around designing scalable REST API services, writing clean database access patterns, and securing client-server communications.

I care deeply about backend craftsmanship—from choosing the right relational vs. document data model, to writing idempotent payment webhook consumers, configuring Redis cache policies, and maintaining clear OpenAPI documentation.

Core Architectural Focus Areas

API Architecture

Modular REST APIs with clean controller-service layers and structured error pipelines.

Data Modeling

PostgreSQL & MongoDB schemas with custom indexing and transaction consistency.

Security & RBAC

Stateless JWT authentication, refresh token rotation, and role-based permissions.

Async Processing

BullMQ & Redis job queues with exponential retry backoff for long-running workflows.

Payment Webhooks

Idempotent event processing for Stripe and SSLCommerz payment reconciliation.

DevOps & Tooling

Docker containerization, PM2 process management, and Postman/Swagger contracts.

Get in Touch

Let's Discuss
Your Next Role.

Available for full-time backend positions, contract API development, and remote engineering opportunities.

Direct Email

princetaijul123@gmail.com

Phone

+880 1581 628 634

Location

Dhaka, Bangladesh

GitHub LinkedIn Resume

Send a Direct Message

Fill out the form below to reach me directly via email.

Backend Engineer Building Reliable APIs & Scalable Systems.

Work & Production Systems

Featured Engineering Projects

AI Controller

Multi-Vendor E-Commerce API Engine

Playfantasy365

Selected Production Systems

Strides Co — Production E-Commerce

BongOz Films — Movie Ticketing

Emerald Restaurant Management

Internal Reusable Platform

Reusable Admin CMS Platform

Production Experience

Backend Developer

Full Stack Developer (Backend Focused)

Engineering Stack

Backend Core

Databases & Storage

DevOps & Tools

Frontend

Taijul Islam

Engineering with a focus on Reliability, Data Integrity & Clean APIs.

Core Architectural Focus Areas

API Architecture

Data Modeling

Security & RBAC

Async Processing

Payment Webhooks

DevOps & Tooling

Let's Discuss Your Next Role.

Send a Direct Message

Backend Engineer
Building Reliable APIs
& Scalable Systems.

Engineering with a focus on
Reliability, Data Integrity & Clean APIs.

Let's Discuss
Your Next Role.