I will fix angular, nestjs, javascript bugs and performance issues

M
muddassier
M
muddassier
Muddassir H.
fix angular, nestjs, javascript bugs and performance issues
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fix angular, nestjs, javascript bugs and performance issues

About this gig

Frustrated with a bug, error, or performance issue in your Angular, NestJS, or JavaScript project? I have extensive full stack experience and am skilled at quickly debugging frontend, backend, or full stack issues the right way.


How I work:

  • Carefully analyze your code to find the real root cause
  • Check official docs & best practices where needed
  • Apply a clean fix without breaking other features
  • Test thoroughly to ensure everything works
  • Deliver clean code + a simple explanation


Types of bugs & issues I fix:

  • Performance & slow loading
  • Auth & login problems
  • API integration & connection errors
  • State management & data sync
  • Build & deployment failures
  • Version upgrades & migration issues
  • Database queries & connections
  • Backend & server errors
  • Routing & navigation bugs
  • Forms & validation errors
  • layout / responsive issues
  • Black screen errors
  • Any other Angular, NestJS, or JS related issue


Technologies I work with:

Angular | NestJS | Node.js | Express.js | JavaScript | MongoDB | Firebase | Tailwind CSS | Bootstrap


Message me first with your issue or repo I will review, give an honest price. Most bugs fit this package; complex ones need a custom offer. Send a message or order now!

  • Programming language

    • JavaScript

  • Expertise

    • Debugging
    • Performance
    • Security
    • Design
    • Databases

  • Frontend framework

    • Angular
    • AngularJS
    • Bootstrap
    • Tailwind CSS

  • Backend framework

    • Express.js
    • NestJS
    • Node.js
    • Other

Get to know Muddassir H.

Muddassir H.

Full Stack Developer Angular NestJS MongoDB REST API

5.0(2)
  • FromPakistan
  • Member sinceAug 2025
  • Avg. response time1 hour
  • Last delivery3 weeks

  • Languages

    English, Urdu
I am a skilled full stack developer focusing on frontend and backend solutions using tech stacks like NestJS and Angular. I have over 2+ years of experience in bug fixing and building modern websites and web applications. Count on me for high-quality development and excellent communication throughout the project. If you need a frontend or full stack developer, I am here to help you using modern technologies like Angular | NestJS | MongoDB | Node.js | RxJS | HTML | CSS | JavaScript | TypeScript | Tailwind CSS | PrimeNG | Angular Material | Firebase | Netlify | Render and Railway.

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