Available for new roles

Reazul Islam Reaz

Backend-focused full-stack engineer

I build backends and APIs meant to run in production.

PostgreSQL

MongoDB

Redis

Node.js

Express

NestJS

REST APIs

GraphQL

View Projects Resume

About Me

Hi, I'm Reazul Islam Reaz, a backend-focused full-stack engineer.

I ship SaaS products end to end — clean APIs, solid data layers, and thin frontends. I design for scale, safe payments, and operability.

Core Stack

TypeScriptNode.jsExpress.jsNestJSGoPostgreSQLMySQLMongoDBRedisReactNext.jsTailwind CSS

Platform focus

GraphQL for clear API contracts
Socket and event-driven interfaces
RBAC and multi-tenant guardrails
Payments and hardened webhooks

How I work

▹Modular services with clear API boundaries
▹Relational and document schema design
▹Auth, authorization, and rate limiting
▹Idempotent Stripe payment flows
▹Cloud deploys with CI/CD
▹Structured logging and error contracts
▹AI tooling with human review and tests
▹End-to-end delivery across the stack

Let's Build Systems

Architecture & scale

Production patterns from APIs I've shipped — traffic routing, data layers, and safe integrations.

Typical production flow

Client

Nginx / LB

API layer

PostgreSQL / MongoDB

Redis / QueueWorkers / Webhooks

Traffic & platform

Shipped on J&K Cabinetry, Confaero

Vertical load balancer with Nginx reverse proxy for API routing
Versioned REST APIs with Express and NestJS
Clear service boundaries as products grow

Data & async

Shipped on Connectify, Replii, Confaero

Redis caching and Socket.IO multi-instance scaling
BullMQ background workers for async jobs
PostgreSQL and MongoDB indexing on hot paths

Safety & payments

Shipped on HavenKeys, J&K Cabinetry, TaskForge

JWT auth with role-based access control
Rate limiting and guarded API surfaces
Idempotent Stripe and webhook handling

Realtime & integrations

Shipped on Connectify, Replii, J&K Cabinetry

Socket.IO messaging with scoped room broadcasts
S3 media upload pipelines
RAG replies and third-party API integrations

See implementations in Projects

Toolkit

Backend-first stack — all in active use.

45 technologies across 7 areas

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

Academic background. Technical training lives under Certifications.

Social science, not CS — by design. It sharpens how I research requirements, document decisions, and communicate trade-offs.

In progressIn progress · Expected graduation 2026
Bachelor of Social Science (Honors)
Political Science
National University, Bangladesh
Bangladesh
Honors program in governance, policy, and research — builds analytical thinking and clear writing for software delivery.
Highlights
- Research design and academic writing
- Governance and political analysis
- Policy framing and stakeholder context
- Data interpretation and systems evaluation
Focus areas
- Political theory
- Public policy
- Research methodology
- Governance & institutions

Technical training

Full-stack, cloud, and AI programs are listed under certifications.

View certifications & learning

Experience

Production backend roles — expand for architecture and contributions.

Current roleFull-timeOn-site
Back End Developer
Sparktech Agency
Jan 2026 – Present · 5 mos
Mohakhali, Dhaka, Bangladesh
Backend systems for event platforms — REST APIs, RBAC, and real-time features.
- Node.js
- Express.js
- NestJS
- TypeScript
- Go
- FastAPI
- +22
Build scalable, secure backends for web and event apps — API design, data modeling, access control, and real-time features with frontend and mobile teams.
Architecture
Express + TypeScript with MongoDB, JWT-guarded routes per persona, and Socket.IO for event-scoped realtime — transport, validation, and domain logic separated.
Contributions
REST APIs with Node.js, Express, and 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 standard responses.
API testing with Postman; focus on performance and data integrity.
Tech stack
Node.js
Express.js
NestJS
TypeScript
Go
FastAPI
MongoDB
PostgreSQL
MySQL
SQL
Prisma
Mongoose
Redis
GraphQL
REST APIs
Microservices
Socket.IO
WebRTC
ZEGOCLOUD
JWT
SMTP
IMAP
Rate limiting
Caching
Queue-based processing
Load balancing
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
- NestJS
- TypeScript
- React
- PostgreSQL
- +13
Built server-side features and integrated React UIs with REST APIs and PostgreSQL in a collaborative team.
Contributions
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
NestJS
TypeScript
React
PostgreSQL
MySQL
SQL
Prisma
Redis
REST APIs
Socket.IO
WebRTC
JWT
SMTP
IMAP
Tailwind CSS
Postman
Git & GitHub

Certifications

Programs aligned with production backend work.

Full Stack Web Development

Completed

Modern web stack 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 infrastructure 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 bootcamp — TypeScript full-stack, production patterns, cloud, and AI features.

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 patterns and intelligent workflows.

Topics

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

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

Projects

Highlights first — open a case study for architecture and metrics.

J&K Cabinetry CT

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

Next.js 16
React 19
TypeScript
Tailwind CSS
Redux Toolkit
RTK Query
+12

Connectify

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

Next.js 15
React 19
TypeScript
Tailwind CSS
TanStack Query
Node.js
+8

Confaero

Conference ops — QR check-ins and exhibitor leads without duplicates under load.

Node.js
Express
TypeScript
MongoDB
JWT
React
+2

Replii

AI email SaaS — multi-mailbox sync and smart replies on NestJS + PostgreSQL.

NestJS
TypeScript
PostgreSQL
Prisma ORM
IMAP
SMTP
+1

Contact

Open to roles and project conversations.

Open to new opportunities and interesting projects. Reach out anytime.

reazul.dev@gmail.com

+8801770807782

Follow me:

Get in touch

Available for backend roles and interesting projects.

Reazul Islam Reaz