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English
$
USD
I will fix bugs and boost core web vitals in your nextjs app
Hamza Rafique
5.0
5.0
About this gig
Is your Next.js app slow, breaking, or throwing errors you can't track down?
A sluggish app or stubborn bug costs you rankings, conversions, and revenue.
I'm a Senior Full-Stack Engineer with 7+ years of experience, including government-grade digital transformation projects. I diagnose and fix Next.js issues fast hydration errors, broken API routes, bloated bundles, failing Core Web Vitals and find root causes, not just symptoms.
What you'll get:
Full diagnostic pass (Lighthouse, Core Web Vitals, bundle audit)
Bug fixes: hydration mismatches, routing/middleware, API errors, state bugs, memory leaks
Performance wins: image/font optimization, caching, code-splitting
Clean before/after report
"Hamza's contributions were outstanding, with exceptional attention to detail and professionalism that went above and beyond. Fluency, thorough understanding, and courteous demeanor made every exchange seamless."
Send me your repo or a screen recording of the issue before ordering, and I'll scope it accurately.
Get to know Hamza Rafique
Hamza Rafique
Senior FullStack Engineer AI Apps Design Systems RAG
- FromBahrain
- Member sinceSep 2019
- Avg. response time1 hour
- Last delivery1 year
Languages
English, German, Spanish, Arabic
I am a Senior Full-Stack Engineer with 8 years of experience building production-grade web apps for startups and enterprises. I specialize in React/Angular design systems with Storybook, intelligent RAG AI chatbots, and custom AI-powered SaaS platforms.
My focus is delivering clean, scalable architecture on time. By combining cutting-edge AI features (OpenAI/LangChain) with robust, high-performance infrastructures (Node.js, Next.js, and GraphQL), I transform complex product ideas into fast, secure, enterprise-ready digital solutions. Let’s scale your platform.
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FAQ
What is your turnaround time?
Delivery time depends on the project scope. For small tasks (e.g., bug fixes or one-page UIs), it’s 1-3 days. For larger projects, it can take 3-14 days. I always communicate timelines upfront.
How do you ensure the quality of your work?
I follow best practices, write clean and maintainable code, and thoroughly test my work to ensure it’s bug-free, responsive, and optimized for performance.
Do you work with APIs?
Yes, I have extensive experience integrating third-party APIs and building custom APIs for seamless data handling in web applications.
Can you fix bugs in my existing project?
Absolutely! I can debug and fix issues in your existing codebase, whether it’s related to functionality, performance, or responsiveness.
What AI models and services do you work with?
I specialize in comprehensive LLM development including OpenAI integration (GPT-4, assistants API), Anthropic's Claude 3.5, and Google's Gemini. I build custom RAG systems and fine-tuned models based on your specific data and use case requirements.
How do you implement AI features into applications?
I architect end-to-end AI solutions starting with proper OpenAI integration strategies, including cost-effective prompt engineering, vector database setup for RAG systems, and custom LLM development workflows using LangChain or custom orchestration frameworks.
Can you build a chatbot like ChatGPT for my business?
Absolutely! I create custom AI chatbots with secure OpenAI integration, trained on your specific data through RAG systems. This isn't just basic chatbot development—it's custom LLM development tailored to your industry and use case.
Reviews
2 reviews for this Gig
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naveed_shahid
Pakistan
Hamza was excellent at fixing React/Next.js bugs. They were knowledgeable, efficient, and communicated well. Highly recommend!
$50
Price
2 days
Duration
Helpful?N naveed_shahid
Pakistan
Hamza's contributions to the development were outstanding, demonstrating exceptional attention to detail and a level of professionalism that went above and beyond expectations. In addition to delivering high-quality work, collaborating with Hamza was a delight; his fluency, thorough understanding, and...
$50
Price
1 day
Duration
H 
Seller's Response
Helpful?
Reviews
2 reviews for this Gig
| (2) | ||
| (0) | ||
| (0) | ||
| (0) | ||
| (0) |
Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
Most relevant
N naveed_shahid
Pakistan
Hamza was excellent at fixing React/Next.js bugs. They were knowledgeable, efficient, and communicated well. Highly recommend!
$50
Price
2 days
Duration
Helpful?N naveed_shahid
Pakistan
Hamza's contributions to the development were outstanding, demonstrating exceptional attention to detail and a level of professionalism that went above and beyond expectations. In addition to delivering high-quality work, collaborating with Hamza was a delight; his fluency, thorough understanding, and...
$50
Price
1 day
Duration
H Seller's Response
Helpful?
