Open for new backend and DevOps projects

Nahid Hasan

Backend EngineerDevOpsCloud

I build scalable backend systems, cloud infrastructure solutions that help teams move faster.

Working with

  • TypeScript
  • Node.js
  • NestJS
  • FastAPI
  • PostgreSQL
  • Prisma
  • Docker
  • GitHub Actions
  • Linux
  • Stripe
Portrait of Nahid Hasan
About

A backend engineer who builds production-ready systems

Production REST APIs and the infrastructure around them, built to stay reliable long after launch.

I'm a backend engineer who builds production REST APIs and the infrastructure around them — from schema design to deployment. My day-to-day stack is Node.js, NestJS, and Express.js on the JavaScript side, and Python with FastAPI on the other, backed by PostgreSQL and Prisma.

I care about getting the boring parts right: clean authentication and access control, database integrity, automated test coverage, and APIs that are actually documented, not just working. Recently I've been building a two-sided marketplace platform (Tradeeaze) from the ground up — auth, discovery, billing, and a full security pass across the API — and before that, a multi-role CRM backend (Armorix) serving admins, dealers, and installers on one system.

  • Production REST APIs, documented and tested
  • Clean authentication and access control
  • Database integrity with PostgreSQL and Prisma
  • Repeatable deployments with Docker and Kubernetes

3+

Years Experience

20+

Projects Built

10+

Technologies

24/7

Learning Mindset

How I work

I'm comfortable owning a backend independently on a freelance basis, and equally comfortable working inside a larger codebase with other contributors and clear module boundaries.

Skills

Technologies I work with

Tools and systems I rely on to build reliable, production-grade backend infrastructure.

Languages

Day-to-day code

05
  • TypeScript
  • JavaScript
  • Python
  • Dart
  • SQL

Backend

APIs and services

08
  • Node.js
  • NestJS
  • Express.js
  • FastAPI
  • REST API
  • Prisma
  • SQLAlchemy
  • Swagger

Database

Storage and caching

05
  • PostgreSQL
  • MySQL
  • MongoDB
  • Redis
  • SQLite

DevOps

Build, test and ship

08
  • Docker
  • Docker Compose
  • GitHub Actions
  • Kubernetes
  • Nginx
  • Apache
  • systemd
  • Git

Cloud & Servers

Where it runs

05
  • Linux
  • Ubuntu
  • DigitalOcean
  • AWS
  • Cloudflare

Integrations & Mobile

Payments, messaging, apps

05
  • Stripe
  • Firebase
  • Twilio
  • LLMs
  • Flutter
Experience

Where I’ve been building backend systems

Work across backend engineering, DevOps, and automation projects that need reliable production support.

  1. Backend Systems Engineer

    Independent EngineerOn-site

    2023 — Present

    Delivering backend systems, cloud deployments and automation for SaaS and technical projects.

    • Built production-ready APIs with fault-tolerant deployment pipelines.
    • Designed Kubernetes-ready infrastructure for scalable backend services.
    • Automated deployments, observability and routine operations.
    TypeScriptNode.jsNestJSFastAPIPostgreSQLPrismaDockerGitHub ActionsLinux
Projects

Selected work across backend, DevOps and automation

Systems where API design, reliable deployment, and automation had to hold up in production.

Armorix preview
BackendFeatured
2024

Armorix

A role-based vehicle foil wrap management platform with real-time chat and asset tracking.

  • Strict Role-Based Access Control (RBAC)
  • Real-time chat with Socket.io
  • AWS S3 integration for media
  • Firebase Cloud Messaging (FCM)
Node.jsExpressPrismaMySQLSocket.ioAWS S3Firebase
Tradeeaze preview
BackendFeatured
2024

Tradeeaze

A marketplace backend connecting construction businesses with freelancers, featuring secure escrow payments and booking workflows.

  • Escrow payment integration
  • Booking & negotiation workflow
  • Real-time messaging
  • Scalable infrastructure
NestJSPrismaPostgreSQLStripeAWSFirebase
API Performance Profiler preview
DevToolsFeatured
2024

API Performance Profiler

A lightweight Node.js middleware and CLI that profiles real API requests and replays them under load.

  • Zero-config Express/NestJS middleware
  • Real request token/body recording
  • Local JSON channel for CLI/VS Code
  • Automatic production disablement
TypeScriptNode.jsExpressNestJSVS Code API
AI-EGENT preview
AI / Backend
2024

AI-EGENT

An open-source deep research AI agent powered by LangChain, FastAPI, and free AI APIs.

  • Multi-turn AI Chat Sessions
  • LangChain & Groq integration
  • SQLAlchemy ORM with Alembic
  • Image Understanding (Cloudinary)
PythonFastAPILangChainPostgreSQLSQLAlchemyAlembic
Book-Artist preview
Full StackFeatured
2024

Book-Artist

A conversion-focused author and speaker platform featuring interactive 3D book inspection and a built-in podcast audio player.

  • Interactive 3D book shelf with parallax tilt
  • Built-in podcast player with Web Audio API
  • Chapter previews & lead magnet PDF downloads
  • Headless automated QA test suite (54 checkpoints)
JavaScriptHTML5Tailwind CSSWeb Audio APINode.jsExpress
Rooted Together preview
Full StackFeatured
2024

Rooted Together

A community-driven urban tree planting platform connecting neighbors to organize, discover, and RSVP for local greening events.

  • Real-time event RSVP & capacity spot counter
  • Interactive canopy impact metrics and stories
  • Dynamic event filtering by neighborhood & date
  • Full-stack monorepo with Express & Drizzle ORM
ReactTypeScriptTailwind CSSFramer MotionNode.jsExpressPostgreSQLDrizzle ORM
Services

What I can help you build

Backend engineering, cloud infrastructure, and automation work designed for production systems.

Backend Architecture

Design and build scalable Node.js and NestJS backends with clean APIs and reliable service behavior.

  • REST API design
  • Authentication & authorization
  • Microservice readiness

Cloud & DevOps

Deploy and operate backend systems using Docker, Kubernetes, Nginx, and cloud infrastructure patterns.

  • Container orchestration
  • Infrastructure reliability
  • Deployment automation

Database Engineering

Model and optimize relational and NoSQL systems for fast, consistent backend performance.

  • PostgreSQL tuning
  • MongoDB design
  • Redis caching
Contact

Let’s discuss your next backend project

Backend development, cloud deployment, or automation — send a short brief and I’ll reply with how I’d approach it.

Available

Open for new backend and DevOps projects

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