I will write and fix custom javascript PHP or node js scripts

S
serg19xx
S
serg19xx
Sergiy K
write and fix custom javascript PHP or node js scripts
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write and fix custom javascript PHP or node js scripts

About this gig

Are you facing bugs, console errors, or script failures in your web application?

I am an experienced web developer, and I will quickly diagnose, debug, and fix issues in your code so your application runs smoothly and reliably.

What I can help you with:

  • Fixing JavaScript, Node.js, and browser console errors
  • Debugging PHP backend scripts and server logic
  • Fixing AJAX, Webhooks, and API connection failures
  • Database query and logic fixes (MySQL / PostgreSQL)
  • HTML/CSS layout and responsiveness issues
  • Writing clean, efficient custom scripts

Why choose this service?

  • Clean, well-commented, and maintainable code
  • Fast response time and clear technical communication
  • Thorough testing before delivery

Please send me a short message describing your issue before placing an order so we can discuss the requirements!

  • Programming language

    • TypeScript

  • Expertise

    • Algorithms & Data structures
    • Localization
    • Performance
    • Databases

  • Frontend framework

    • jQuery
    • Next.js
    • Nuxt.js
    • Tailwind CSS
    • Vue.js

  • Backend framework

    • CakePHP
    • Express.js
    • Next.js

Get to know Sergiy K

Sergiy K

Web Application Developer

  • FromCanada
  • Member sinceMay 2018

  • Languages

    English, Russian, Ukrainian
I build full-stack web applications with a strong focus on SaaS architecture and real-world usability. My work goes beyond traditional development—I design and implement complete systems, from frontend interfaces to backend APIs and infrastructure. I focus on building systems that are structured, maintainable, and ready for growth.

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