You will get React and Next.js Bug Fixing and Code Review Done
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Project details
I fix React, Next.js, Node.js, Python, and full-stack application issues, from root-cause investigation to clean, production-ready solutions. I also audit applications built with Claude Code, Cursor, Lovable, Replit, and other AI-assisted tools, identifying bugs, technical debt, duplicated logic, and architectural issues.
With 7+ years of experience and 80+ production applications delivered, I’ve worked on AI applications, SaaS platforms, mobile apps, enterprise software, CRM systems, marketplaces, and API-driven products.
I handle TypeScript/JavaScript errors, API failures, authentication issues, database problems, performance bottlenecks, integration errors, UI bugs, backend issues, and AI-generated code cleanup.
My service includes bug investigation, root-cause analysis, code review, clean implementation, refactoring and production-readiness recommendations.
I work with React, Next.js, TypeScript, JavaScript, Node.js, Python, FastAPI, Flutter, React Native, PostgreSQL, Supabase, Firebase, AWS, Docker, OpenAI, Claude, LangChain and RAG.
𝐁𝐄𝐅𝐎𝐑𝐄 𝐁𝐔𝐘𝐈𝐍𝐆 𝐓𝐇𝐈𝐒 𝐏𝐑𝐎𝐉𝐄𝐂𝐓:
Every Client has unique requirements - please let’s talk in Upwork Chat before ordering.
With 7+ years of experience and 80+ production applications delivered, I’ve worked on AI applications, SaaS platforms, mobile apps, enterprise software, CRM systems, marketplaces, and API-driven products.
I handle TypeScript/JavaScript errors, API failures, authentication issues, database problems, performance bottlenecks, integration errors, UI bugs, backend issues, and AI-generated code cleanup.
My service includes bug investigation, root-cause analysis, code review, clean implementation, refactoring and production-readiness recommendations.
I work with React, Next.js, TypeScript, JavaScript, Node.js, Python, FastAPI, Flutter, React Native, PostgreSQL, Supabase, Firebase, AWS, Docker, OpenAI, Claude, LangChain and RAG.
𝐁𝐄𝐅𝐎𝐑𝐄 𝐁𝐔𝐘𝐈𝐍𝐆 𝐓𝐇𝐈𝐒 𝐏𝐑𝐎𝐉𝐄𝐂𝐓:
Every Client has unique requirements - please let’s talk in Upwork Chat before ordering.
Programming Languages
HTML & CSS, JavaScript, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$99
|
Standard
$199
|
Advanced
$299
|
|---|---|---|---|
| Delivery Time | 2 days | 4 days | 6 days |
Number of Revisions | 2 | 3 | 5 |
Bug Investigation | |||
Fix Documentation | - | ||
Detailed Code Comments | - |
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About Khush
Full Stack Developer | AI Developer | SaaS & Mobile App Developer
100%
Job Success
Maur, India - 4:15 am local time
💡 My primary focus as a Full Stack Developer AI is designing complete software solutions that combine modern frontend technologies, scalable backend architecture, and artificial intelligence. As a Python Full Stack Developer, I transform complex business requirements into reliable, maintainable, and high-performing products that deliver measurable business value.
🤝 Throughout my career as a Full Stack Developer AI, I've collaborated with designers, product managers, AI engineers, DevOps specialists, and business stakeholders. I believe every SaaS Developer should understand not only software architecture but also customer needs, product strategy, and long-term scalability.
🛠️ TECHNOLOGIES I WORK WITH
As a Python Full Stack Developer, my primary stack includes:
• Python • Django • Flask • FastAPI
• React • Next.js • TypeScript • JavaScript • Node.js
• PostgreSQL • MongoDB • Redis
• Supabase • Firebase • Docker • AWS
• OpenAI API • LangChain
📈 Over the years, I've helped companies hire a Full Stack Developer AI capable of building production-ready SaaS platforms, integrating AI into existing products, and modernizing legacy systems. As a SaaS Developer, I focus on creating software that remains scalable as businesses grow.
📈 WHAT I BUILD
As a Full Stack Developer AI, I can help with:
• AI-powered SaaS platforms
• Scalable web applications
• Backend architecture & API development
• AI integration using OpenAI and LLMs
• AI agents, assistants and automation
• RAG & knowledge-based applications
• SaaS architecture & multi-tenant systems
• Database design and optimization
• Authentication & authorization
• Payment gateway integration
• Cloud deployment & CI/CD
• Performance optimization
• Legacy system modernization
• Bug fixing and long-term maintenance
🔧 Many companies choose me as a Python Full Stack Developer because I can take ownership of the complete product lifecycle—from architecture and backend development to frontend implementation and AI integration. As a SaaS Developer, I always balance technical quality with business objectives.
⚡ VIBE CODING, AI DEVELOPMENT & CODE CLEANUP
I use modern AI development tools such as Claude Code, Cursor, Lovable, Replit, Base44 and Supabase to accelerate prototyping, feature development, UI implementation, API integration, debugging and MVP development.
I also help companies clean up and productionize AI-generated or rapidly developed codebase
🌐 FULL-STACK & SAAS EXPERIENCE
I've worked as a as a Full Stack Developer AI on startup MVPs, enterprise platforms, CRM solutions, marketplaces, analytics dashboards, internal business systems, AI automation platforms and multi-tenant SaaS applications.
My experience includes PostgreSQL, MySQL, MongoDB, Redis, Supabase, Firebase, AWS, Docker, Kubernetes, Python, Node.js, React, OpenAI API and LangChain.
🔗 This broad technical background allows me to deliver complete products as a Python Full Stack Developer, while my experience as a SaaS Developer helps businesses build reliable platforms that are secure, maintainable, and ready to scale.
☁️ CLOUD & DEVOPS
I have experience with AWS, Docker, Kubernetes, CI/CD, GitHub Actions and production deployments, including scalable infrastructure, automated deployments, monitoring, logging and performance optimization.
🎯 HOW I WORK
I believe a great Full Stack Developer AI should think beyond writing code. Product strategy, UX, architecture, AI capabilities, scalability, security and maintainability are equally important.
As a Python Full Stack Developer, I value ownership, transparency, and close communication with clients. Every SaaS Developer should build software that is easy to extend, simple to maintain, and capable of supporting future business growth.
📚 I've also contributed in:
• Software architecture
• AI solution design
• Technical planning
• Code reviews
• Database optimization
• CI/CD pipelines
• Agile development
• Team collaboration
• Mentoring developers
🚀 Whether you need a Full Stack Developer AI, Python Full Stack Developer, SaaS Developer, AI Developer, or Vibe Coding specialist to build a new product, improve an existing application, or clean up an AI-generated codebase, I can help take it to production.
📊 Companies often hire a Full Stack Developer AI to build intelligent SaaS platforms, automate business workflows, or integrate generative AI into existing products. Others look for an experienced Python Full Stack Developer to modernise legacy systems.
✨ Let's discuss your project and build something reliable, scalable, and production-ready.
Best regards,
Khushdeep
Steps for completing your project
After purchasing the project, send requirements so Khush can start the project.
Delivery time starts when Khush receives requirements from you.
Khush works on your project following the steps below.
Revisions may occur after the delivery date.
Bug Investigation & Root Cause Analysis
I’ll reproduce the issue, inspect the relevant code and dependencies, trace the problem to its root cause, and provide a clear explanation of what is causing it before implementing any fix.