You will get a production-ready AI backend API with LLM integrations
Top Rated
Project details
Build a scalable production-ready AI backend API for your application, SaaS platform, chatbot, or internal product.
I develop clean backend AI systems—not fragile prototypes.
Perfect for:
✅ AI chat APIs
✅ OpenAI / Claude integrations
✅ FastAPI backend development
✅ LLM endpoints
✅ AI microservices
✅ RAG backend APIs
✅ authentication + usage APIs
✅ streaming AI responses
✅ scalable AI infrastructure
Supported technologies:
FastAPI, Python, OpenAI, Claude, Gemini, Llama, vector databases, PostgreSQL, Redis, Docker, AWS
Common deliverables:
• AI REST APIs
• auth-secured endpoints
• streaming chat APIs
• document processing APIs
• model integration backends
• AI microservices
• scalable backend architecture
Top Rated Plus engineer with 12+ years building production APIs and AI systems.
I develop clean backend AI systems—not fragile prototypes.
Perfect for:
✅ AI chat APIs
✅ OpenAI / Claude integrations
✅ FastAPI backend development
✅ LLM endpoints
✅ AI microservices
✅ RAG backend APIs
✅ authentication + usage APIs
✅ streaming AI responses
✅ scalable AI infrastructure
Supported technologies:
FastAPI, Python, OpenAI, Claude, Gemini, Llama, vector databases, PostgreSQL, Redis, Docker, AWS
Common deliverables:
• AI REST APIs
• auth-secured endpoints
• streaming chat APIs
• document processing APIs
• model integration backends
• AI microservices
• scalable backend architecture
Top Rated Plus engineer with 12+ years building production APIs and AI systems.
AI Algorithms
Large Language Model, Multimodal Large Language Model, Transformer ModelAI Applications
AI Chatbot, AI-Generated Code, Conversational AI, Natural Language Generation, Natural Language UnderstandingAI Development Language
PythonAI Tools
Adobe Firefly, Azure OpenAI, GitHub Copilot, Gradio, Hugging Face, Replit, Streamlit, TensorFlowAI Models
ChatGPT, GPT-4, LLaMA, Stable Diffusion, WhisperWhat's included
| Service Tiers |
Starter
$399
|
Standard
$1,299
|
Advanced
$2,999
|
|---|---|---|---|
| Delivery Time | 4 days | 8 days | 14 days |
Number of Revisions | 2 | 3 | 5 |
AI Model Integration | |||
Batch Normalization | - | - | - |
Database Integration | - | ||
Detailed Code Comments | - | ||
Image Upscaling | - | - | - |
MLOps | - | - | |
Model Deployment | - | ||
Model Documentation | - | ||
Model Monitoring | - | - | |
Model Testing & Optimization | |||
Model Tuning | - | - | - |
Natural Language Processing | - | - | - |
NLP Tokenization | - | - | - |
Pre-Training | - | - | - |
Prompt Engineering | |||
Setup File | |||
Source Code | - |
Frequently asked questions
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KK
Komal K.
Sep 23, 2025
Senior full-stack developer - SaaS MVP (Next.js, Node.js, AI, Contenful, AWS)
Hardik was absolutely fantastic to work with. He delivered a high-quality project using Next.js, React, and Tailwind CSS that exceeded my expectations. Communication was excellent throughout the entire process, and they were incredibly responsive and professional. I highly recommend them and would definitely hire him again for future projects. A true five-star experience!
MM
Margaret M.
Jul 17, 2024
Websiote speed improvement for miobile view and operations updates
Working with Hardik was a fantastic experience. They communicated promptly, delivered high-quality work, and met all deadlines. Their professionalism and attention to detail exceeded my expectations. Highly recommended!
MM
Margaret M.
Jun 22, 2024
Plugin updates and security Wordpress
MB
Murray B.
Jun 11, 2024
Builders Spec portal
Hardik did an outstanding job. He migrated the production server flawlessly, ensuring my product's stability. Additionally, he identified and resolved an existing issue with the AutoDesk Viewer, including 360 View, Floor Plan, 3D Model, and Gallery View integration. I am extremely impressed with his responsiveness, expertise, and dedication to this task. Hardik's work exceeded my expectations, and I will definitely keep him in mind for future projects.
KK
Komal K.
Apr 27, 2024
Nextjs Reactjs Nodejs AWS Full Stack developer required
We were thoroughly impressed with Hardik's expertise in Full Stack development and the exceptional work he delivered. Should the opportunity for collaboration arise again, we would gladly engage with him without hesitation. Thank you for your outstanding contributions.
About Hardik
Full-Stack Engineer | Next.js | Node.js | AWS | AI | Automation
100%
Job Success
Ahmedabad, India - 11:56 pm local time
I build and ship production-grade web applications — SaaS products, marketplaces, e-commerce platforms, and cloud-native systems. With 40+ completed contracts and repeat clients across 5+ years, I bring senior-level full-stack depth with the ability to integrate modern AI features your product actually needs.
If you need a reliable engineer who can own the full execution — frontend to backend to AWS infrastructure — and also add LLM-powered features, automation workflows, or AI chatbots on top, I'm the right fit.
🌐 FULL-STACK WEB DEVELOPMENT
(Where my 40+ job track record lives)
➜ Next.js 15 App Router, React, TypeScript, Tailwind CSS, SvelteKit, Angular, Vue 3
➜ Node.js, NestJS, Express, Laravel, Go, GraphQL, tRPC, REST APIs, Prisma
➜ PostgreSQL, Supabase, MongoDB, Redis, MySQL, Firebase, DynamoDB
➜ Stripe payments, Supabase Auth, Sentry, PostHog, third-party API integrations
➜ Shopify, WooCommerce, and e-commerce platform development
➜ SaaS MVPs, marketplace platforms, and subscription products
➜ Performance optimization, bug fixing, and production hardening
➜ Real-time features with WebSockets and event-driven architecture
📦 HEADLESS CMS
(Proven across 10+ platforms)
➜ Contentful, Craft CMS, Payload, Sanity, Strapi, Storyblok, WordPress (headless)
➜ CMS migrations, custom field architecture, and content modelling
➜ Headless frontend builds with Next.js and GraphQL content APIs
☁️ CLOUD & DEVOPS
(AWS across multiple production projects)
➜ AWS: EC2, S3, RDS, Lambda, ECS, CloudFront, Cognito, Bedrock
➜ Docker, Kubernetes, Terraform, GitHub Actions, CI/CD pipelines
➜ Cloud migrations, serverless architectures, infrastructure setup
➜ Vercel, Netlify, Railway deployments
➜ Security hardening, performance monitoring, and production support
🤖 AI INTEGRATION & AUTOMATION
(Actively building — strong foundation, real capability)
➜ OpenAI GPT-4o and Claude (Anthropic) API integrations into web products
➜ RAG pipeline development using LangChain, pgvector, Pinecone, and FAISS
➜ AI chatbots and conversational interfaces added to existing SaaS products
➜ Python/FastAPI backends powering AI microservices and LLM workflows
➜ n8n, Make (Integromat), and Zapier automations enhanced with LLM intelligence
➜ Slack, WhatsApp, Telegram, and email workflow automation
➜ Vector search and semantic search over internal docs and product data
➜ MCP server integrations and custom agent workflows
✅ WHY CLIENTS COME BACK
➜ Full ownership — frontend, backend, infrastructure, and integrations
➜ 40+ jobs completed, repeat clients, consistent 5-star feedback across 5 years
➜ Reliable delivery — on time, on budget, with clear communication throughout
➜ I use Claude Code and Cursor as serious engineering tools: clear specs, clean PRs, tested edge cases
➜ Deep headless CMS expertise across 10+ platforms including large-scale deployments
➜ 4+ hour overlap with US Eastern from IST — async-friendly, fast communicator
➜ Clean, documented, maintainable code — not vibe-coded chaos your next dev has to untangle
🎯 BEST-FIT PROJECTS
✔ SaaS MVP or web application from zero to production
✔ Adding AI features — chatbot, RAG system, or automation — to an existing product
✔ Headless CMS build, migration, or content architecture
✔ AWS infrastructure setup, serverless architecture, or cloud migration
✔ Marketplace, e-commerce, or subscription platform
✔ Performance optimization and production hardening
✔ Codebase cleanup — including Claude/Cursor-generated code
✔ Long-term part-time development partnership
Have a project that needs reliable senior execution? Let's talk — I'll give you an honest scope and own it from day one.
Steps for completing your project
After purchasing the project, send requirements so Hardik can start the project.
Delivery time starts when Hardik receives requirements from you.
Hardik works on your project following the steps below.
Revisions may occur after the delivery date.
Architecture & API Planning
Define backend architecture, endpoints, integrations, and AI workflows.
API Development
Build backend APIs, model integrations, business logic, and infrastructure setup.