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Fiverr Pro
English
$
USD
I will fix react, nextjs, python, and node js errors quickly
Rocco C
About this gig
Is your web application broken, failing API requests, or crashing with console errors?
As an experienced Full-Stack Engineer, I diagnose and resolve code bugs across modern frontend and backend architectures quickly, cleanly, and safely.
### ️ Stacks & Errors I Resolve:
React & Next.js: Hydration mismatches, SSR rendering bugs, state management loops (Redux, Context, Zustand) & TypeScript errors
Node.js & Express: Server crashes, unhandled rejections, CORS policy errors & JWT auth failures
Python (FastAPI, Django, Flask): Backend routing exceptions, scraping blockers (Selenium, Playwright) & automation script failures
Databases & APIs: PostgreSQL, MongoDB, REST API status errors (400, 401, 403, 500) & webhook glitches
### Why Work With Me?
Root-Cause Resolution: I fix the core issue so it won't break again
Clean & Documented Code: Clear explanation of what failed and how it was fixed
Fast Turnaround: Emergency bugs prioritized for rapid delivery
100% Confidentiality & secure repository handling
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️ IMPORTANT: Please send me a message with your error log, codebase details, or repository access BEFORE placing an order so I can confirm the fastest delivery time.
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 Rocco C
Rocco C
Senior FullStack Developer
- FromItaly
- Member sinceSep 2025
- Avg. response time1 hour
Languages
English, Italian, Spanish, German
I am a Senior Full-Stack Developer and IT Consultant with over 5 years of experience designing scalable web solutions for large international groups. I specialize in complex architectures for the Banking and Industrial sectors, with proven expertise in migrating high-criticality portals and managing enterprise data flows using Angular, React, Node.js, and Java.
FAQ
How quickly can you resolve my code error?
Minor syntax and layout bugs are often resolved within a few hours. Complex architectural or backend errors typically take 1 to 2 days.
Can you fix Next.js hydration mismatch errors?
es, I specialize in Next.js debugging, resolving client-server markup differences, dynamic imports, and SSR/CSR state mismatches.
Can you fix CORS errors and API status code failures?
Absolutely. I configure backend headers, middleware, and reverse proxy settings in Node.js and Python to permanently fix CORS and status errors.
How do I share my code securely?
You can share access via GitHub/GitLab repository, a ZIP archive, or private code snippets (Gist).
Do you test the fix before delivery?
es. All fixes are thoroughly tested in an isolated local environment to ensure existing functionality remains untouched.
Can you debug Python web scrapers and automation scripts?
Yes, I fix Selenium, Playwright, BeautifulSoup, and requests scripts, resolving bot detection blocks and parsing errors.
Can you fix database connection timeouts in PostgreSQL or MongoDB?
Yes, I diagnose connection pools, environment configurations, and ORM query performance.
Can you provide a custom offer for ongoing development?
Yes, message me directly and I can set up a custom milestone or dedicated debugging support contract.
What if the bug is caused by a third-party service outage?
I will provide proof of the third-party failure and recommend fallback strategies or refund your order.
Do you sign an NDA if required?
Yes, I treat all client repositories and proprietary logic with complete confidentiality.
