I will fix bugs and improve performance in react, nextjs or nestjs apps

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sergey_vm
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sergey_vm
Sergey M
fix bugs and improve performance in react, nextjs or nestjs apps
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fix bugs and improve performance in react, nextjs or nestjs apps

About this gig

Is your project throwing errors or running slowly? Dont worry I will fix bugs, debug errors, and optimize performance in your frontend or backend code.

I can help with:

  • Fixing React / Next.js build and runtime errors
  • Debugging Nest.js / Node.js server issues
  • Database problems (PostgreSQL, MySQL, MongoDB, Prisma)
  • Authentication and session issues (NextAuth, JWT)
  • UI / responsive layout bugs (Tailwind CSS)

Quick delivery (often same day for small fixes)

Detailed explanation of the issue and solution

Clean, tested code

  • Programming language

    • TypeScript

  • Expertise

    • Debugging
    • Performance
    • Security
    • Databases

  • Frontend framework

    • React.js
    • Tailwind CSS
    • Other

Get to know Sergey M

Sergey M

Business app development

  • FromBelarus
  • Member sinceJun 2025
  • Avg. response time1 hour

  • Languages

    English, Russian, Belarusian
Programming is my hobby turned profession. With an entrepreneurial background and 4+ years of commercial software development experience, I have a deep understanding of the full product development cycle. I am responsible, adaptable and detail-oriented in my work. I'm happy to help you create, customize, or improve tools for your business. I'm available to work solo or as part of a team.

Other Software Development Services I Offer

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