I will reactjs nodejs nestjs apis and full stack web applications

S
sabiruddin_dev
S
sabiruddin_dev
Sabir shaik
reactjs nodejs nestjs apis and full stack web applications
Full Screen
reactjs nodejs nestjs apis and full stack web applications
Full Screen
Full Screen
reactjs nodejs nestjs apis and full stack web applicationsreactjs nodejs nestjs apis and full stack web applicationsreactjs nodejs nestjs apis and full stack web applications

About this gig

Are you looking for a reliable backend developer to build or extend your Node.js application? I specialize in NestJS backend development with a strong focus on API integrations, authentication systems, and payment/wallet architecture.

What I bring to your project:

  • Clean, well-structured NestJS backend code following best practices
  • Secure API integrations (REST, OAuth 2.0) with proper error handling
  • Database design using PostgreSQL and Prisma ORM
  • Authentication systems including JWT and OTP-based verification
  • Payment and wallet systems with safe transaction handling
  • Async job processing using message queues (BullMQ)
  • Written tests (unit, integration) for reliable code

I've worked extensively on production SaaS applications, handling real-world challenges like concurrent transaction safety, third-party API rate limits, and secure credential handling.

Whether you need a new backend module built, an existing system integrated with a new API, or help debugging and scaling your current setup, I'm ready to deliver clean, tested, production-ready code.

Let's discuss your project - message me before ordering if you have specific requirements!

  • Programming language

    • JavaScript

  • Expertise

    • Algorithms & Data structures
    • Debugging
    • Performance
    • Security
    • Databases

  • Frontend framework

    • jQuery
    • Next.js
    • React.js
    • Semantic-UI
    • Tailwind CSS

  • Backend framework

    • Express.js
    • FastAPI
    • NestJS
    • Next.js
    • Node.js

  • AI & low/no code builders

    • Lovable
    • Claude
    • Cursor

Get to know Sabir shaik

Sabir shaik

Full Stack Developer NestJS React API Integration Specialist

  • FromIndia
  • Member sinceJul 2026
  • Avg. response time1 hour

  • Languages

    Bengali, Hindi, English
I'm a full-stack developer specializing in NestJS, React, PostgreSQL, and Redis. I build production-grade SaaS backends with a focus on third-party API integrations (OAuth 2.0), secure payment/wallet systems, and scalable architecture. Recent work includes OTP-based authentication, notification services using message queues (BullMQ), and payment gateway integrations. I write clean, tested code and prioritize performance and security. Need a backend built from scratch, an API integrated, or help scaling an existing system? I deliver reliable, production-ready solutions.

Related tags