Available for new opportunities

Dhaka · Onsite & Remote

Reazul Islam Reaz

Backend-focused full-stack engineer — I build the APIs, data models, and background workers behind production web applications.

I design REST APIs, relational and document data models, role-based access control, and queue-backed background jobs. My production work runs on Node.js, NestJS, Express, PostgreSQL, MongoDB, and Redis — including two platforms live today for paying clients.

Core Tech StackHover to inspect production role

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Backend Specialist

Production APIs

99.9% Target Uptime

Low Latency

Sub-ms Redis Caching

SYSTEM TOPOLOGYLIVE ARCHITECTURE

ClientHTTPS

──▶

Nest / GoCore API

──▶

Redis0.4ms

──▶

PostgreSQLACID

10+

Systems Shipped

Production & Client SaaS

<50ms

P99 API Latency

Redis & Indexed SQL

Clean

Architecture

Modular & Test-Driven

Available

Onsite & Remote

Dhaka & Worldwide

About

Backend-focused full-stack engineer. I design APIs, data models, and the jobs that keep products running.

I'm Reazul Islam Reaz. I build the backend of production web apps — REST APIs, relational and document data models, role-based access, and queue-backed background jobs. When a product needs it, I also ship the React / Next.js UI.

Most of my recent work is client SaaS and event platforms at Sparktech Agency. I like problems where the data has to stay consistent, the API has to stay predictable, and slow work has to happen off the request path. Day to day that means Node.js, NestJS, Express, PostgreSQL, MongoDB, and Redis.

What I focus on

APIs and contracts

Type-safe DTOs and Zod/Prisma models so clients get predictable, versioned REST APIs.

Data modeling

PostgreSQL with indexes and transactions, and MongoDB when the data is document-shaped.

Caching and background work

Redis and BullMQ so slow jobs stay off the request path instead of blocking HTTP handlers.

Auth and payments

RBAC, JWT guards, rate limiting, structured logging, and idempotent payment webhooks.

Technologies I use

TypeScriptNode.jsExpress.jsNestJSGoPostgreSQLMySQLMongoDBRedisDockerReactNext.js

How I usually work

Modular service boundaries with clean domain separation
ACID-compliant relational and document schema design
Auth, authorization (RBAC), and rate limiting
Idempotent Stripe and multi-gateway payment flows
Dockerized cloud deploys with GitHub Actions CI/CD
Structured Pino logging and unified error contracts
AI tooling and RAG integration with human verification
End-to-end delivery across backend and modern React UIs

Get in touch

Skills

The stack I use to design APIs, model data, and run production backends.

Typical backend flow

REST / GraphQL

API Gateway & Validation

NestJS · Express · Go

Auth & Security

RBAC · JWT · Rate Limiting

Guards · Helmet · CORS

Relational & NoSQL

ACID Schemas & Aggregations

PostgreSQL · MongoDB

Caching

Memory Stores & Sessions

Redis · In-Memory

Job Queues

Async Workers & Outbox

BullMQ · Event Loops

Cloud & Ops

Containers & CI/CD

Docker · AWS · Nginx

45 technologies in 7 groups

Backend & APIs

Node.js
TypeScript
Go
Express.js
NestJS
REST APIs
GraphQL
Microservices

Databases & modeling

MongoDB
PostgreSQL
MySQL
SQL
Database design

Architecture

System design
API architecture
Auth & RBAC
Event-driven patterns

Performance & reliability

Redis
Caching
Rate limiting
Queues & workers

DevOps & cloud

Containers, proxies, cloud deploys, and CI/CD.

Docker
Docker Compose
Nginx
AWS · EC2 · S3
AWS IAM & VPC
DigitalOcean
Hostinger
CI/CD
GitHub Actions
Linux
CloudWatch
Serverless · Lambda

AI & payments

RAG, AI integrations, and idempotent payment webhooks.

RAG
AI tooling
Stripe
SSLCommerz · M-Pesa

Frontend (when needed)

React
Next.js
TypeScript
Tailwind CSS
TanStack Query
Redux Toolkit
Zustand
Vite

Education

Honors program in Political Science at National University, Bangladesh.

In progressIn progress · Expected graduation 2026
Bachelor of Social Science (Honors)
Political Science
National University, Bangladesh
Bangladesh
Honors program covering governance, policy, research methods, and institutional systems.
Highlights
- Research design and academic synthesis
- Governance and multi-stakeholder policy analysis
- Qualitative systems evaluation & structuring
- Data interpretation and complex reasoning
Focus areas
- Political theory
- Public policy
- Research methodology
- Governance & institutions

Certifications

Full-stack, cloud, and AI coursework is listed in the certifications section.

View certifications

Experience

Roles where I built and maintained production backends.

Current RoleFull-timeOn-site
Full Stack Developer (Backend-Focused)
Sparktech Agency
Jan 2026 – Present · 9 mos
Mohakhali, Dhaka, Bangladesh
Full-stack event platforms — React/Next.js UIs, Node.js APIs, RBAC, and real-time features.
- Node.js
- Express.js
- NestJS
- TypeScript
- React
- Next.js
- +20
Deliver end-to-end web and event app features — React/Next.js frontends integrated with scalable Node.js backends, API design, data modeling, access control, and real-time capabilities alongside frontend and mobile teams.
Architecture
React/Next.js clients over Express + TypeScript with MongoDB, JWT-guarded routes per persona, and Socket.IO for event-scoped realtime — presentation, transport, validation, and domain logic separated.
What I worked on
Full-stack features across React/Next.js frontends and Node.js/Express APIs in TypeScript.
MongoDB/Mongoose schemas for event-driven workloads.
RBAC across Admin, Organizer, Volunteer, Attendee, and Exhibitor roles with JWT auth.
Event modules: registration, check-in, volunteer tasks, exhibitor workflows.
Socket.IO for chat, polling, and sessions; QR workflows for attendance and leads.
Layered architecture with Zod validation, centralized errors, and consistent API contracts for UI integration.
Postman and manual QA for API behavior; focus on performance, UX alignment, and data integrity.
Tech stack
Node.js
Express.js
NestJS
TypeScript
React
Next.js
Tailwind CSS
MongoDB
PostgreSQL
MySQL
SQL
Prisma
Mongoose
Redis
REST APIs
Socket.IO
WebRTC
ZEGOCLOUD
JWT
Zod
SMTP
Rate limiting
Caching
Queue-based processing
Postman
Git & GitHub
InternshipOn-site
Full Stack Developer (Backend-Focused)
Softvence
Sep 2025 – Dec 2025 · 4 mos
Dhaka, Bangladesh
Backend-focused internship — React frontends, Node.js APIs, and PostgreSQL.
- Node.js
- Express.js
- TypeScript
- React
- PostgreSQL
- MySQL
- +7
Built server-side features and integrated React UIs with REST APIs and PostgreSQL in a collaborative team.
What I worked on
Backend features with Node.js and Express in team delivery.
PostgreSQL modeling, queries, and data integrity.
React UI integration against REST contracts.
TypeScript and Git workflows for review and shipping.
Tech stack
Node.js
Express.js
TypeScript
React
PostgreSQL
MySQL
SQL
Prisma
REST APIs
JWT
Tailwind CSS
Postman
Git & GitHub

Certifications

Courses I have completed in web development, AWS, and AI-assisted engineering.

Full Stack Web Development

Completed

Modern web stack, distributed API patterns, and full-stack application development.

Topics

React & Next.js
Node.js & Express APIs
MongoDB
JWT auth
REST APIs
Full-stack architecture

Platform: Udemy — Full Stack Development (React, Next.js, Node.js)
Focus: End-to-end apps with backend integration.
Credential: View verified certificate View course on Udemy

AWS Cloud Computing

Completed

Hands-on AWS cloud infrastructure, VPC networking, and backend deployment.

Topics

IAM & security
EC2, S3, VPC
Load balancing & auto scaling
Lambda & serverless
CloudWatch
CI/CD
Docker & cloud basics

Platform: Udemy — Hands-On Introduction to Cloud Computing with AWS
Focus: Scalable backends, cloud deploys, and infrastructure.
Credential: View verified certificate View course on Udemy

Next Level Web Development

Completed

AI-driven software engineering bootcamp — TypeScript full-stack, production patterns, cloud, and AI agents.

Topics

TypeScript, OOP & modular architecture
Node.js & Express REST APIs
Next.js App Router & auth
PostgreSQL, SQL & Prisma
RAG, vector DBs & embeddings
LangChain & AI agents
Docker, Nginx & orchestration
AWS, Linux & GitHub Actions CI/CD
SDLC, Agile, TDD & API testing
AI-integrated full-stack capstone

Platform: Programming Hero — Next Level AI-Driven Software Engineering Bootcamp
Focus: AI-driven engineering — scalable backends, TypeScript, and deployable infrastructure.
Credential: View bootcamp overview

AI & Intelligent Systems

Completed

AI-assisted backend architectures, vector indexing, and intelligent workflows.

Topics

RAG & semantic search
Prompt engineering
AI API integrations
Context-aware backends
Vector retrieval

Platform: OpenAI, Claude, Cursor, ChatGPT, Gemini
Focus: Intelligent backends with AI integration.

Projects

Selected work — what I built, the stack, and links to live apps.

Showing 4 of 6

Elevate Apparel — E-Commerce Platform

Production-grade apparel e-commerce platform — Next.js 16 storefront, role-gated admin console, and NestJS 11 REST API with BullMQ & PostgreSQL.

Production deployment for live merchant (elevateapparel.com.bd)

Next.js 16
React 19
NestJS 11
TypeScript
Tailwind CSS 4
PostgreSQL 17
Prisma 7
+9

J&K Cabinetry CT

Wholesale cabinetry platform — customer portal, admin dashboard, and REST API in production.

Three production apps — customer site, admin dashboard, and REST API

Next.js 16
React 19
TypeScript
Tailwind CSS
Redux Toolkit
RTK Query
React 18
+11

Confaero

Conference ops — QR check-ins and exhibitor lead capture with duplicate-safe writes.

Published to Google Play as an organizer/attendee app

Node.js
Express
TypeScript
MongoDB
JWT
React
Socket.IO
+1

Connectify

WhatsApp-style social app — chat, feed, friends, and voice/video calls.

Real-time messaging with typing, read receipts, and presence

Next.js 15
React 19
TypeScript
Tailwind CSS
TanStack Query
Node.js
Express
+7

Contact

Open to backend and full-stack roles in Dhaka or remote. Currently at Sparktech Agency.

If you're hiring a backend or full-stack engineer, I'd like to hear from you. I work on-site in Dhaka and remotely.

reazul.dev@gmail.com

WhatsApp / Phone

+8801770807782

Profiles

A role title, stack, and whether it's on-site in Dhaka or remote is enough to start. I usually reply within 24–48 hours.

Download Resume

Get in touch

Available for Backend & Full-Stack Roles

Reazul Islam Reaz