I will develop custom features for your react, next js or fastapi web app

M
mahin_anowar
M
mahin_anowar
Mahin Anowar
develop custom features for your react, next js or fastapi web app
Full Screen
develop custom features for your react, next js or fastapi web app
Full Screen
Full Screen
develop custom features for your react, next js or fastapi web appdevelop custom features for your react, next js or fastapi web appdevelop custom features for your react, next js or fastapi web app

About this gig

Need a new feature added to your web app done right? I build custom features into your existing React, Next.js, Node, or FastAPI app, cleanly integrated with your codebase.

I can build:

  • Pages, dashboards & UI (React / Next.js, responsive)
  • APIs & backend logic (Node/Express, Python/FastAPI)
  • Auth, payments & real-time (JWT/OAuth, payment gateways, WebSocket/SSE)
  • Database work & integrations (PostgreSQL, MongoDB)

Why me: I'm a full-stack developer who ships production features on a real platform used by 1000+ users, and I've had code merged into major open-source projects Node.js, React Router, ESLint, Jest and more. I work inside your existing codebase and match your style no messy bolt-on code.

What you get:

  • A working, tested feature integrated into your app
  • Clean, documented, production-ready code
  • A clear walkthrough of how it works

How it works: send me your repo/code, your stack, and what you want built. I'll confirm scope, timeline, and the right package before you order.

Message me first let's build it properly.

  • Programming language

    • TypeScript

  • Expertise

    • Debugging
    • Performance
    • Security
    • Databases
    • Source control

  • Frontend framework

    • Next.js
    • React.js
    • Tailwind CSS
    • Vue.js
    • Three.js

  • Backend framework

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

  • AI & low/no code builders

    • Claude
    • Cursor

Get to know Mahin Anowar

Mahin Anowar

Full Stack Developer

  • FromBangladesh
  • Member sinceJun 2020
  • Avg. response time1 hour

  • Languages

    Bengali, English
Hi, I'm Mahin — a full-stack developer from Bangladesh (CSE @ North South University). I work with JavaScript/TypeScript (React, Next.js, Node) and Python (FastAPI), plus PostgreSQL & MongoDB. I build complete web apps from scratch — including NSU Insights, my own AI platform used by 1000+ students — and I'm especially strong at digging into unfamiliar code to find and fix the real cause of bugs. I've had fixes merged into major open-source projects — React Router, ESLint, Axios, Node.js, Jest and more. Need a web app built or a tricky bug fixed? Send me the details and I'll handle it.

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