I will fix javascript or typescript bugs

M
marwenlabidi
M
marwenlabidi
Marwen Labidi
fix javascript or typescript bugs
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fix javascript or typescript bugs

About this gig

Is a bug blocking your release? Crashing your users? Silent and impossible to reproduce?


I'm a Senior Full-Stack Developer with 5+ years of experience in production JS/TS codebases

from small SaaS apps to enterprise platforms used by thousands.


I fix:

Runtime errors & unhandled promise rejections

Type errors, strict-mode TS mismatches, and "any" abuse

Logic bugs hiding behind async/await or Promises

Memory leaks (closures, event listeners, intervals)

Broken third-party integrations (APIs, SDKs, libraries)

Edge-case failures that only appear in production


Every patch includes:

Root-cause explanation (not just a quick patch)

A before/after diff you can review and understand

Guidance on how to avoid the same bug in the future


I work with vanilla JS, TypeScript, React, Vue, Node.js, Next.js, and most modern frameworks.

No black-box fixes. No "it works on my machine."

  • Programming language

    • JavaScript

  • Expertise

    • Algorithms & Data structures
    • Debugging
    • Performance
    • Source control
    • Testing procedures

  • Frontend framework

    • Next.js
    • Preact
    • React.js
    • Svelte
    • Tailwind CSS

  • Backend framework

    • Express.js
    • Fastify
    • NestJS
    • Next.js
    • Node.js

Get to know Marwen Labidi

Marwen Labidi

Senior Full Stack React js Node js Three js React Native

  • FromTunisia
  • Member sinceMar 2024
  • Avg. response time1 hour

  • Languages

    English, Arabic, French
5+ years in React, Node.js, TypeScript · Full-stack architecture · Micro-frontends · React Native mobile · Three.js & React Three Fiber 3D experiences · Performance & security audits. Web · Mobile · 3D · Performance · Security Freelance, B2B & contract — DM or email to get started.

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