You will get your Lovable app or any vibe code app ready for real users
Top Rated
Project details
Over the last few years, I have helped startups and solo founders turn AI-generated prototypes that barely hold together into clean, scalable, production-ready products.
If you have started building with Lovable, Bolt.new, Replit, Cursor, or similar AI tools, I step in where the AI stops. I refactor, extend, and harden your app using a production-grade stack, so it actually works under real users and real load.
What I can help you with:
• Clean up and debug unstable AI-generated codebases
• Refactor into modular, testable, long-term maintainable architecture
• Harden authentication flows, permissions, and row-level security
• Design reliable API boundaries between frontend, backend, and AI services
• Implement usage tracking, limits, and guardrails for AI features
• Control AI costs with rate limiting, caching, and scoped prompts
• Optimize database schemas, queries, and indexing for real traffic
• Migrate prototypes into scalable production systems without rewrites
Why clients hire me:
• 9+ years building and delivering real products
• Proven experience rescuing AI-generated apps before they collapse
• Fast execution without sacrificing code quality or scalability
If you have started building with Lovable, Bolt.new, Replit, Cursor, or similar AI tools, I step in where the AI stops. I refactor, extend, and harden your app using a production-grade stack, so it actually works under real users and real load.
What I can help you with:
• Clean up and debug unstable AI-generated codebases
• Refactor into modular, testable, long-term maintainable architecture
• Harden authentication flows, permissions, and row-level security
• Design reliable API boundaries between frontend, backend, and AI services
• Implement usage tracking, limits, and guardrails for AI features
• Control AI costs with rate limiting, caching, and scoped prompts
• Optimize database schemas, queries, and indexing for real traffic
• Migrate prototypes into scalable production systems without rewrites
Why clients hire me:
• 9+ years building and delivering real products
• Proven experience rescuing AI-generated apps before they collapse
• Fast execution without sacrificing code quality or scalability
AI Development Type
Deep Learning, Knowledge Representation, Model Tuning, Recommendation System, Software MaintenanceAI Tools
Keras, MLflow, OpenCV, PyTorch, TensorFlowAI Development Language
PythonWhat's included
| Service Tiers |
Starter
$200
|
Standard
$600
|
Advanced
$1,200
|
|---|---|---|---|
| Delivery Time | 4 days | 11 days | 21 days |
Number of Revisions | 1 | 2 | 5 |
AI Model Integration | |||
Detailed Code Comments | - | - | |
Knowledge Graph | - | - | - |
Model Documentation | - | ||
Ontology | - | - | - |
Source Code | |||
Taxonomy | - | - | - |
66 reviews
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RM
Rust M.
Jun 27, 2026
Mech AI Development | AI, Full stack Engineering
Really happy with the results. He understood the requirements quickly, handled both frontend and backend parts without issues, and was easy to work with the whole time. Highly recommend.
RM
Rust M.
Jan 19, 2026
Full Stack Engineer Needed for Angular/CapacitorJS Project Enhancements
It was a pleasure working with Nikunj throughout this project. He took full ownership of our AI-powered automotive platform and treated it like his own product, delivering meaningful, production-level improvements across both web and mobile.
What truly set him apart was his ability to understand the vision. He didn’t just focus on writing code or following tickets. He understood how the product is used, asked thoughtful questions, and challenged assumptions when something didn’t make sense. That approach led to better decisions and noticeable improvements in usability and system reliability.
On the technical side, he resolved critical issues, added new important features, and strengthened overall platform stability across devices. His work made the platform more dependable, easier to use, and better prepared for real users at scale.
If you’re looking for a senior-level full-stack freelancer who is comfortable with AI integrations, complex data flows, and real-world scalability challenges, I would strongly recommend him. We’d be more than happy to work with him again on future projects.
What truly set him apart was his ability to understand the vision. He didn’t just focus on writing code or following tickets. He understood how the product is used, asked thoughtful questions, and challenged assumptions when something didn’t make sense. That approach led to better decisions and noticeable improvements in usability and system reliability.
On the technical side, he resolved critical issues, added new important features, and strengthened overall platform stability across devices. His work made the platform more dependable, easier to use, and better prepared for real users at scale.
If you’re looking for a senior-level full-stack freelancer who is comfortable with AI integrations, complex data flows, and real-world scalability challenges, I would strongly recommend him. We’d be more than happy to work with him again on future projects.
BJ
Brian J.
Dec 12, 2025
You will get Cross-Platform Android & iOS mobile app using React Native & Angular/Ionic
Knowledgeable, proactive, and thorough. Highly skilled developer with strong problem solving skills. Highly recommended.
NJ
Niki J.
Oct 10, 2025
Update Android App
Nikunj was prompt with response and technically very good. We would recommend him, and will use him, again.
KY
Krishna Y.
Aug 25, 2025
Web developer (typescript, javascript, python, css)
Nik has implemented LLM and RAG features, integrated OpenAI/PyTorch components, and optimized our APIs for speed and reliability. His problem-solving, clean code, and proactive communication stand out. he worked independently and documented everything clearly. I would gladly hire him again for any GenAI, AI Agents work.
About Nikunj
Senior Full Stack AI Engineer | React | Python | Capacitor | RAG | LLM
100%
Job Success
Surat, India - 12:08 am local time
My core stack includes React, Next.js, Angular, React Native, Ionic, Capacitor, Node.js, NestJS, Python, FastAPI, Django, Firebase, Supabase, PostgreSQL, MongoDB, AWS, GCP, Azure, Docker, Vercel, and DigitalOcean.
I build AI-powered products that ship to production: LLM copilots, voice agents, RAG pipelines, and workflow automation, backed by full stack engineering so the AI feature actually works inside a real, scalable app.
Also build clean frontend architecture, scalable APIs, admin dashboards, mobile apps, subscription systems, RBAC, real-time workflows, third-party integrations, and production deployment pipelines. I also handle App Store and Play Store submissions, approvals, rejections, deep links, push notifications, in-app purchases, and mobile release workflows.
AI-powered products built using OpenAI, Gemini, Anthropic, LangChain, LangGraph, Vapi, ElevenLabs, Cursor, Claude Code, GitHub Copilot, Lovable, Bolt, and Replit.
I can help with:
* SaaS MVP development
* React, Next.js, and Angular apps
* React Native, Ionic, and Capacitor apps
* AI chat, voice agents, copilots, and automation
* Firebase and Supabase apps
* Node.js, NestJS, Python, FastAPI, and Django APIs
* Dashboards, RBAC, subscriptions, and admin panels
* App Store and Play Store deployment
* Cordova to Capacitor migration
* Legacy app cleanup, bug fixing, and performance improvement
How I work:
* Clear scope and realistic milestones
* Direct communication and regular updates
* Clean Git workflow with branches and PRs
* Proper testing before handover
* Deployment notes and next-step recommendations
I use AI-assisted development to move faster, but I do not blindly ship AI-generated code. Every important part is reviewed, tested, and handled with production quality in mind.
Send me a short description of what you are building, and I’ll come back with a clear approach, timeline, and fit.
Steps for completing your project
After purchasing the project, send requirements so Nikunj can start the project.
Delivery time starts when Nikunj receives requirements from you.
Nikunj works on your project following the steps below.
Revisions may occur after the delivery date.
Quick Audit & Scope Lock
I will review your existing app, identify weak spots, and lock scope so there are no surprises later.
Stabilization & Refactor
Cleaning up AI-generated code, fix structural issues, and refactor for clarity and maintainability.