
AI Voice Agents, RAG Chatbots with Citations & Workflow Automation — Live Demos You Can Try Before You Hire
Explore their links and the rest of this profile to get to know who they are. Zinn Hub keeps every Zinner's profile open and transparent — so you can build trust and hire with confidence.
Ramanjit Singh has proven their skill set to Zinn Hub and provided evidence of their work. Every Verified Zinner passes a hands-on quality assurance review — so you can hire with confidence.
🛡️ Verified since July 2026
I build AI systems that do real work for small businesses — and you can try them before you ever pay me.
I'm Ramanjit Singh, founder of AT Innovators. I personally scope, build, and ship every project, which means you talk to the person writing the code, not an account manager. I focus on three things I've built end to end many times over: AI voice agents that answer your calls, qualify the caller, and book straight into your calendar; document chatbots that answer only from your own files — policies, manuals, catalogs — and cite the exact page, so they can't make things up; and workflow automation in n8n, Make, or Zapier that kills the copy-paste busywork between your tools, with error alerts, retries, and run logs you can actually see.
What makes this different from every other listing you'll scroll past: I don't just describe my work — I show it. Six complete products are documented as open case studies with live, working demos you can click through yourself: a voice receptionist, a customer-service copilot, a study-abroad advisor, a document assistant, an automation studio, and an OCR catalog search. Browse them at ramanjit. and ask me for the demo password — judge the quality with your own hands before we ever talk money.
How I work is deliberately low-risk. I put the scope in writing and get your approval before a single dollar moves. You get demo links during the build, so you course-correct mid-project instead of being surprised at delivery. And at handover, you own 100% of the code — I remove my own access and hand you the keys.
Stack: OpenAI, Claude, and self-hosted LLaMA; RAG with pgvector/PostgreSQL; OCR; WebRTC voice; React/TypeScript; FastAPI/Node.js; Docker; Cloudflare.
working with clients worldwide. Send me your problem and I'll tell you honestly whether AI is the right fix.
Technologies and expertise this freelancer specialises in.
Service areas this freelancer is available for.

Real-time voice AI that answers, qualifies, and books appointments — while the front desk watches it happen live.
View details →
AI intake that answers from the business’s own documents, follows up by SMS, and books the calendar — with a visible audit trail for every step.
View details →
A study-abroad advisor that grounds explanations in verified sources and derives program tables from a live catalog — with the admin console that keeps both honest.
View details →
An enterprise knowledge assistant where every streamed answer cites its source — and clicking the citation lands on the exact highlighted passage in the original PDF.
View details →
Marketing automation on a node canvas — triggers, enrichment, email, SMS, and Canva wired together, with runs you can watch execute step by step.
View details →
OCR + vector search + chat over a messy industrial catalog — where the answer quotes a number that exists only inside a photocopied scan.
View details →Create a free account or log in to message this freelancer directly.
Log In / Sign UpWhere would you like to go?
My account Buyer dashboard, orders, profile Zinner dashboard Manage your services and earnings Ambassador dashboard Track referrals and commission LogoutYour cart contains Zinns from another Zinner. You can only order from one Zinner at a time.
Would you like to clear your cart and add this Zinn, or checkout with your current order first?
Get the Zinn Hub App
Notifications · Faster access · Full-screen
Tap Share in your browser
➜ Then tap "Add to Home Screen"