You will get bug fixes for your Next.js, React application
Project details
Fix React or Next.js Bugs and Issues
Having a bug, error, or unexpected behavior in your React or Next.js application? I can help you identify the root cause and implement a clean, reliable fix.
I will debug and fix React / Next.js issues such as JavaScript and TypeScript errors, broken components, API integration problems, routing issues, responsive UI bugs, state management problems, build errors, and performance-related issues.
What I can help with:
React.js and Next.js bugs
JavaScript / TypeScript errors
UI and responsive issues
API and REST API integration problems
Routing and navigation issues
State management bugs
Authentication issues
Build and deployment errors
Performance problems
Component and functionality bugs
I focus on finding the actual cause of the problem rather than applying temporary workarounds. You will receive clean, maintainable code and a tested solution.
Tech stack: React.js, Next.js, TypeScript, JavaScript, Node.js, Express.js, REST API, MongoDB, PostgreSQL, Redux Toolkit, Tailwind CSS.
Having a bug, error, or unexpected behavior in your React or Next.js application? I can help you identify the root cause and implement a clean, reliable fix.
I will debug and fix React / Next.js issues such as JavaScript and TypeScript errors, broken components, API integration problems, routing issues, responsive UI bugs, state management problems, build errors, and performance-related issues.
What I can help with:
React.js and Next.js bugs
JavaScript / TypeScript errors
UI and responsive issues
API and REST API integration problems
Routing and navigation issues
State management bugs
Authentication issues
Build and deployment errors
Performance problems
Component and functionality bugs
I focus on finding the actual cause of the problem rather than applying temporary workarounds. You will receive clean, maintainable code and a tested solution.
Tech stack: React.js, Next.js, TypeScript, JavaScript, Node.js, Express.js, REST API, MongoDB, PostgreSQL, Redux Toolkit, Tailwind CSS.
Programming Languages
HTML & CSS, JavaScript, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, DesignWhat's included
| Service Tiers |
Starter
$30
|
Standard
$70
|
Advanced
$130
|
|---|---|---|---|
| Delivery Time | 2 days | 3 days | 5 days |
Number of Revisions | 1 | 2 | 3 |
Design Customization | - | - | - |
Content Upload | - | - | - |
Responsive Design | |||
Source Code |
Frequently asked questions
About Borys
Full Stack Developer | Next.js, React, NestJS, Node.js, TypeScript
Kyiv, Ukraine - 2:01 pm local time
If you need a developer who can handle both the frontend and backend, I can help you build a new application, add features to an existing project, integrate an API, fix bugs, or improve performance and architecture.
What I can help you with
• Build full-stack applications using Next.js/React on the frontend and Node.js with Express.js or NestJS on the backend
• Develop responsive and modern frontend interfaces
• Build scalable REST APIs and backend services
• Implement JWT authentication and authorization
• Integrate Google OAuth and other authentication providers
• Build role-based access control (RBAC)
• Develop QR-based authentication systems
• Implement real-time functionality with SocketIO
• Work with PostgreSQL and MongoDB databases
• Integrate third-party APIs and services
• Build admin dashboards and data-driven applications
• Fix bugs and improve existing Next.js, React, and Node.js applications
• Optimize application performance and code structure
• Containerize applications with Docker and prepare them for deployment
My main stack
Frontend: Next.js, React, TypeScript, JavaScript, Redux Toolkit, Tailwind CSS, SCSS
Backend: Node.js, NestJS, Express.js, REST API, SocketIO
Authentication: JWT, Google OAuth, RBAC, QR Authentication
Databases: PostgreSQL, Sequelize ORM, MongoDB, Mongoose ODM,
Tools: Docker, Git, GitHub, Postman, Linux, Vercel, Render
Recent project experience
QR Security Authentication Platform
Built a full-stack authentication platform using Next.js, Express.js, TypeScript, MongoDB, SocketIO, JWT, and Google OAuth.
The system includes QR-based login, cross-device authentication, secure authorization, session management, real-time communication, and REST APIs.
Full-Stack E-commerce Platform
Developed an e-commerce application with Next.js and NestJS including authentication, product management, shopping cart, product comparison, reviews, search, filtering, sorting, pagination, image uploads, REST APIs, and an admin dashboard.
Why work with me?
• Full-stack development from frontend to backend
• Clean and maintainable TypeScript code
• Strong focus on authentication and API architecture
• Experience working with both SQL and NoSQL databases
• Responsive, mobile-friendly interfaces
• Clear communication and structured development
• Comfortable working with existing codebases as well as building applications from scratch
Whether you need a Next.js developer, React developer, Node.js/NestJS backend developer, API developer, or a full-stack TypeScript developer, I can help turn your requirements into a reliable, production-ready application.
Steps for completing your project
After purchasing the project, send requirements so Borys can start the project.
Delivery time starts when Borys receives requirements from you.
Borys works on your project following the steps below.
Revisions may occur after the delivery date.
Review the Issue
I will review your code, error messages, and reproduction steps to identify the root cause.
Fix the Bug
I will implement a clean fix and make sure it works correctly without breaking existing functionality.