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I will integrate openai, chatgpt or llm apis into your nodejs app
Gagan
About this gig
Want to add AI to your product? I'll integrate OpenAI, ChatGPT or other LLM APIs into your Node.js backend so it works reliably in production.
I've shipped this myself: my AI resume analysis tool runs an LLM pipeline (Llama 3.3 70B via Groq) and is live with paying users. Before that, I spent 2.5 years building backends for a SaaS platform serving 500+ enterprise customers.
What I can build:
- AI chatbots and assistants for your app or website
- Document and PDF analysis, summaries and data extraction
- AI features inside your SaaS (writing, scoring, classification)
- Chat with your documents (RAG) using embeddings and a vector database
- Structured JSON outputs your app can use directly
Built for production:
- Secure API key handling on the backend
- Rate limits, retries and cost controls
- Clean REST API endpoints your frontend can call
- Full source code and setup instructions
Please message me before ordering with what you want the AI to do, and I'll suggest the best approach and model.
Get to know Gagan
Gagan
Backend Engineer NodeJS NestJS GraphQL AWS
- FromIndia
- Member sinceMar 2021
Languages
Kannada, English, Hindi
I build fast, reliable backends for SaaS products and startups.
Backend engineer with 2.5 years building multi-tenant SaaS for 500+ enterprise customers and 50K+ daily API requests: GraphQL APIs, AWS fraud detection, Temporal and Kafka workflows. I've also launched two products of my own with paying users.
I can help with:
• REST and GraphQL APIs (Node.js, NestJS, FastAPI)
• PostgreSQL and Redis design and optimization
• Auth, payments and AI/LLM integrations
• Docker, CI/CD and AWS deployment
Message me with what you're building!
My Portfolio
FAQ
Do I need my own OpenAI API key?
Yes. You'll use your own API key, so you own the account and control the costs. I'll help you set it up and keep it secure on the backend.
How much will the AI usage cost me?
It depends on the model and traffic. I'll recommend a cost-effective model and add limits and caching so your API bill stays predictable.
Can you add AI to my existing app?
Yes. I can add AI endpoints to an existing Node.js backend, or build a small separate AI service your app can call.
Which AI models do you work with?
OpenAI (GPT models), Llama and other LLM providers. I'll suggest the best fit for your use case and budget.
