<60sFirst response
AI replies the moment a lead lands — day or night.
Case study · AI Automation
WarmChats: AI that replies in seconds and books the meeting.
An always-on AI sales assistant that qualifies inbound leads, replies instantly across channels, and books appointments automatically — so no warm lead ever goes cold.
Next.js · NestJS · Django · PostgreSQL · Claude · GPT-4.1 · event-driven microservices
Executive summary
Speed-to-lead decides who wins the deal. WarmChats removes the human delay entirely: Claude reads and qualifies every inbound lead, GPT-4.1 holds a natural, on-brand conversation in real time, and the system books the appointment straight into the calendar — 24/7, with every message tracked. We delivered it as an event-driven microservice platform built to scale from first pilot to thousands of concurrent conversations.
By the numbers
Built for speed-to-lead.
3×More replies
Instant, conversational follow-up keeps leads engaged.
24/7Autonomous
Qualifies, nurtures, and books with no human in the loop.
100%Tracked
Every message logged and auditable across channels.
Figures reflect the WarmChats product's automation targets.
How it works
Qualify → Engage → Book, fully automated.
Each inbound lead flows through three AI stages. The model handles the conversation end-to-end and only escalates to a human when it genuinely matters.
01Qualify
Lead intake & scoring
Claude reads each inbound lead, infers intent, and routes only the conversations worth pursuing.
- Claude (Opus) classifies intent, urgency, and fit
- Noise and spam filtered before a human ever sees it
- High-intent leads prioritised and routed instantly
AI lead selection
02Engage
Instant AI replies
GPT-4.1 holds a natural, on-brand conversation and answers questions in real time across web and messaging.
- GPT-4.1 conversational replies, tuned per brand voice
- Context carried across the full thread, not single messages
- Hand-off to a human the moment it's actually needed
Conversational AI
03Book
Automated scheduling
The assistant detects intent to meet, offers real availability, and writes the appointment to the calendar.
- Detects booking intent and proposes open slots
- Confirms and writes events automatically
- Reminders and follow-ups close the no-show gap
Zero-touch booking
Architecture
Event-driven microservices.
Independent services communicate over events and webhooks, so the AI workload scales separately from the API and the web app — and a slow third-party never blocks a reply.
Web & dashboard
Next.js
- Marketing site, auth, and operator dashboard
- Live conversation view with full message history
API gateway
NestJS
- Typed gateway for web, webhooks, and integrations
- Auth, rate limiting, and event publishing
AI orchestration
Django + LLMs
- Claude lead scoring + GPT-4.1 reply generation
- Prompt templates, retries, and safety guardrails
Messaging & scheduling
Telephony · Calendar
- Inbound/outbound across SMS and chat channels
- Availability lookup and automated booking writes
Engineering patterns
- Event-driven
- Microservices
- Async workers
- Idempotent webhooks
- Audit log
- Horizontal scale
Technology
The full stack.
Frontend
- Next.js
- React
- TypeScript
- Tailwind CSS
Services
- NestJS
- Django
- REST + Webhooks
- Queue workers
Data
- PostgreSQL
- Redis
- Event log
- ORM / migrations
AI
- Claude (Opus)
- GPT-4.1
- Prompt orchestration
- Guardrails
Messaging & infra
- Telephony / SMS
- Webhooks
- Docker
- CI/CD
Outcome
What the business gets.
Every inbound lead answered in seconds, around the clock — no staffing required.
Reps freed from repetitive first-touch follow-up to focus on closing.
A complete, searchable record of every AI conversation and booking.
An architecture that scales from pilot to thousands of concurrent chats.
Want an AI that books appointments while you sleep?
We design and ship product-grade AI systems — from lead capture to booking — on architecture built to scale. Let's talk about yours.