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I will fix and debug your react, nextjs or supabase web application
Ruslan L.
About this gig
Is your React, Next.js, or Supabase application showing errors, broken features, authentication problems, or unexpected behavior?
I will diagnose and fix bugs in your web application, identify the root cause, and provide a clean and reliable solution.
I can help you with:
React component and state issues
Next.js routing, rendering, and build errors
JavaScript and TypeScript errors
Supabase authentication and database issues
API and data-fetching problems
Responsive layout and UI bugs
Form validation and submission errors
Deployment and environment configuration issues
Performance and loading problems
What you will receive:
Detailed diagnosis of the issue
Clean and maintainable code changes
Testing of the repaired functionality
A clear summary of what was fixed
Professional communication throughout the project
Please contact me before placing an order. Send a description of the problem, screenshots or error messages, and relevant technical details. I will review the issue and confirm the appropriate package, price, and delivery time.
Lets get your web application working correctly again.
Respect third-party rights
Please be aware that it is against Fiverr's policies for sellers to include themes, templates, or any other elements that infringe third-party rights or applicable laws in the delivered work. Read more about in our Guide to Responsible Digital Creation.
Get to know Ruslan L.
Ruslan L.
LR company
- FromUkraine
- Member sinceAug 2026
Languages
Ukrainian, English
I build modern CRM systems and business web applications for e-commerce teams and small businesses. My work focuses on customer and lead management, task workflows, team roles, secure authentication, dashboards, and sales analytics.
I use Next.js, TypeScript, React, Supabase, PostgreSQL, REST APIs, and Vercel to create reliable and user-friendly solutions.
I can customize an existing CRM, build new modules, fix bugs, improve dashboards, and adapt software to a company’s workflow and branding. I value clear communication, practical results, and on-time delivery.
My Portfolio
Other Website Maintenance Services I Offer
FAQ
What information do you need before starting?
Please provide a clear description of the issue, screenshots or videos, error messages, steps to reproduce the bug, and relevant technical details.
Do I need to contact you before ordering?
Yes. Every bug has a different level of complexity. I need to review the issue first and confirm the correct package, price, and delivery time.
Can you fix Supabase authentication and database issues?
Yes. I can diagnose Supabase authentication, database queries, permissions, Row Level Security policies, and API integration issues.
Will you need access to my source code?
Yes, source-code access is usually required. Please provide access securely through Fiverr after the project scope has been confirmed. Never send passwords in the public Gig requirements.
What counts as one bug?
One bug is a single reproducible issue with one root cause. Separate errors, unrelated features, or problems requiring different solutions are counted as additional bugs.
