You will get your React or Next.js bugs fixed quickly and professionally
Top Rated
Top Rated
Project details
I will fix bugs, errors, and issues in your React or Next.js application quickly and reliably.
If your application is broken, behaving unexpectedly, or failing in production, I will identify the root cause and resolve it with clean, maintainable solutions—not temporary fixes.
This service is ideal for startups, SaaS products, and businesses that need dependable debugging without delays or poor communication.
What I can fix:
UI bugs and layout issues
API and data fetching errors
Authentication and state issues
Performance problems
Build and deployment errors
Why clients choose this service:
Clear and consistent communication
Proper debugging and long-term fixes
Experience working with real production systems
Reliable delivery based on agreed scope
If your application is broken, behaving unexpectedly, or failing in production, I will identify the root cause and resolve it with clean, maintainable solutions—not temporary fixes.
This service is ideal for startups, SaaS products, and businesses that need dependable debugging without delays or poor communication.
What I can fix:
UI bugs and layout issues
API and data fetching errors
Authentication and state issues
Performance problems
Build and deployment errors
Why clients choose this service:
Clear and consistent communication
Proper debugging and long-term fixes
Experience working with real production systems
Reliable delivery based on agreed scope
Programming Languages
HTML & CSS, JavaScript, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$50
|
Standard
$120
|
Advanced
$250
|
|---|---|---|---|
| Delivery Time | 1 day | 2 days | 5 days |
Number of Revisions | 2 | 3 | 5 |
Design Customization | - | - | - |
Content Upload | - | - | - |
Responsive Design | - | - | - |
Source Code | - | - | - |
Frequently asked questions
11 reviews
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This project doesn't have any reviews.
GG
Gustavo G.
Apr 8, 2026
AI Platform Improvements — Query Fan-Out, Source Tracking & Prompt Management
Working with Onyekachukwu was a great experience. He quickly understood the complexities of our AI platform and delivered high-quality improvements across query fan-out analysis, source tracking, and prompt management.
The features were implemented cleanly and efficiently, especially the handling of large datasets and the improved source classification system. The new bulk prompt actions also made the platform much easier to use.
Communication was clear and professional throughout, and all tasks were delivered on time.
Onyekachukwu is a reliable developer, and I would gladly work with him again.
The features were implemented cleanly and efficiently, especially the handling of large datasets and the improved source classification system. The new bulk prompt actions also made the platform much easier to use.
Communication was clear and professional throughout, and all tasks were delivered on time.
Onyekachukwu is a reliable developer, and I would gladly work with him again.
MT
Michael T.
Mar 20, 2026
Tech Stack Audit and Platform Transition Support
NR
Naima R.
Dec 23, 2025
Project Discovery & Technical Onboarding — Retention OS (5 hours)
Onyekachukwu did an excellent job during this discovery and onboarding milestone.
He took the time to understand the product vision, architecture, and documentation, and provided clear, thoughtful feedback. His questions were relevant, his analysis structured, and his recommendations helped identify gaps early and strengthen the foundation for development.
Communication was smooth and professional, and his written feedback was clear and actionable. This milestone delivered exactly what it was meant to: clarity, alignment, and readiness to move forward.
I would highly recommend Onyekachukwu for SaaS projects requiring strong analytical thinking and solid technical judgment.
He took the time to understand the product vision, architecture, and documentation, and provided clear, thoughtful feedback. His questions were relevant, his analysis structured, and his recommendations helped identify gaps early and strengthen the foundation for development.
Communication was smooth and professional, and his written feedback was clear and actionable. This milestone delivered exactly what it was meant to: clarity, alignment, and readiness to move forward.
I would highly recommend Onyekachukwu for SaaS projects requiring strong analytical thinking and solid technical judgment.
MK
Makoto K.
Dec 17, 2025
Looking for a react + supabase developer for saas completion
poor skill, zero communication
NR
Naima R.
Dec 8, 2025
Supabase Backend + Resend Email Setup for SaaS (Lovable frontend)
This is my second time working with Onyekachukwu, and once again he delivered exceptional work. He is fast, highly skilled, and always focused on finding the best and cleanest solution. His communication is excellent, he understands requirements immediately, and he consistently goes above and beyond to make sure everything works perfectly.
Working with him is effortless and truly pleasant — he is reliable, proactive, and deeply committed to quality. I’m extremely happy with the results and will definitely continue working with him.
A top-tier developer I recommend without hesitation.
Working with him is effortless and truly pleasant — he is reliable, proactive, and deeply committed to quality. I’m extremely happy with the results and will definitely continue working with him.
A top-tier developer I recommend without hesitation.
About Onyekachukwu
Full Stack React Developer | Next.js | Reactjs | AI Integration
92%
Job Success
Onitsha, Nigeria - 12:13 am local time
I help startups, founders, and growing businesses build scalable, secure, and production-ready web applications using Next.js, React, TypeScript, Supabase, and Node.js.
Whether you’re launching a new SaaS product, building an MVP, modernizing an existing platform, or scaling a live application, I deliver clean, maintainable solutions that perform exceptionally well with real users.
I can take full ownership of the development lifecycle from frontend and backend architecture to database design, authentication, integrations, and deployment — while collaborating seamlessly with your team and existing workflow.
WHAT I BUILD
SaaS Platforms
Startup MVPs
Admin Dashboards & Customer Portals
Marketplace & E-commerce Applications
Internal Business Tools
React Native and Flutter Mobile Applications
HOW I HELP CLIENTS
Full Stack Development
End-to-end application development with scalable architecture and long-term maintainability.
SaaS Development
Multi-tenant systems, subscription logic, user management, analytics, and complex business workflows.
Frontend Development
Pixel-perfect, responsive interfaces from Figma designs using modern React and Next.js best practices.
Backend Development
Secure authentication, robust database architecture, APIs, and efficient backend systems with Supabase and Node.js.
API Integration & Third-Party Services
Payment gateways, external APIs, webhooks, and seamless service integrations.
Performance Optimization
Faster load times, Core Web Vitals improvements, SEO, and superior user experience.
TECH STACK
Frontend: React.js • Next.js • TypeScript • Tailwind CSS • Material UI • Redux Toolkit • Zustand • React Native • Flutter
Backend & Database: Supabase • PostgreSQL • Node.js • Express.js • MongoDB • Firebase
Integrations: Stripe • Resend • OpenAI • REST APIs • GraphQL • Webhooks
Tools & Deployment: Git • GitHub • Vercel • Netlify • CI/CD
WHY CLIENTS WORK WITH ME
Top Rated Freelancer
100% Job Success Score
18+ Successfully Delivered Projects
Clean, Production-Ready & Maintainable Code
Strong Architecture & End-to-End Ownership
Available Immediately (30+ hrs/week)
RECENT CLIENT FEEDBACK
“Working with Onyekachukwu was a great experience. He quickly understood the complexities of our AI platform and delivered high-quality improvements.”
“He completed all milestones on time, communicated clearly, and consistently went above and beyond expectations.”
“Highly skilled, proactive, and always focused on finding the best and cleanest solution.”
If you're building or improving a SaaS platform, MVP, dashboard, customer portal, or any modern web application, send me a brief overview of your project.
I’ll review your requirements and come back with a clear implementation plan, realistic timeline, and next steps.
Steps for completing your project
After purchasing the project, send requirements so Onyekachukwu can start the project.
Delivery time starts when Onyekachukwu receives requirements from you.
Onyekachukwu works on your project following the steps below.
Revisions may occur after the delivery date.
Step 1: Review Requirements
I review your issue, codebase, and requirements to understand the root cause.
Step 2: Debugging & Fix Implementation
I identify the problem and implement a clean, maintainable fix.