The Engineer

Think clearly. Solve precisely.

Build reliable, observable & secure AI agents.

From a working chatbot to a production‑grade AI service.

Add fallback handling, real‑time observability (Grafana Cloud), security guardrails and automated lead‑gen email delivery without leaving the no‑code canvas. Code‑first developers can replace any node with a FastAPI or Node.js micro‑service for ultimate flexibility.

Who Is This For?

Pick your path, tighten your AI stack and watch your production‑ready chatbot run flawlessly.

No-Code Builders

Implement the safety net of fallbacks, monitoring dashboards and security without writing a line of code.

Code-first Devs

Utilize drag‑and‑drop speed, then dive into custom APIs (FastAPI / Node.js) for email, validation or advanced guardrails.

Full-stack & Ops

Implement observability, audit trails and SLA‑ready alerting with Grafana Cloud and Prometheus.

Product Leaders & Founders

Build a trustworthy AI sales‑assistant that captures leads, validates data and reliably notifies the sales team.

Learning Path – Step‑by‑Step

1. Kick-off & Mindset

  • Define production goals – reliability (fallbacks), security (API‑key guardrails), observability and lead‑gen conversion rate.
  • Success metrics – % leads captured, fallback‑trigger rate, mean‑time‑to‑recovery (MTTR) and observability coverage (metrics + logs).
  • Mindset shift – from “prototype works” → “the system survives real‑world traffic”.


2. Tool Foundations

  • Flowise – Orchestrates LLM prompts, fallback logic and calls the email backend.
  • Weaviate – Vector DB for RAG – unchanged from Builder.
  • n8n – Visual workflow engine for both the chatbot and the automation pipeline.
  • NocoDB – Spreadsheet‑style relational DB that powers dashboards for devs and non‑devs. Replaces Firestore for lead storage, dead‑letter logs and audit tables.
  • Prometheus + Grafana – Metrics & dashboards. Sign up for Grafana Cloud, create a Prometheus data source and add a simple “fallback_counter” metric.
  • FastAPI / NodeJS – Optional code‑first backend for custom email logic, validation and rate‑limiting.
  • Coolify (future Architect host) – Will eventually host Flowise, n8n, Weaviate, NocoDB, FastAPI/Node services and the Grafana stack on a self‑managed VM. No action needed now – just keep the Docker‑compose files ready.

3. Project 1: RAG Chatbot

  • Add fallback chain
  • Guard‑rail prompts
  • Collect lead data
  • Email the lead
  • Coding opportunity – custom email backend
  • Observability hooks
  • Security hardening


4. Project 2: Automation Workflow

  • Extend the Builder form‑to‑DB pipeline
  • Validate & de‑duplicate
  • Error handling & dead‑letter queue
  • Optional code‑first enrichment
  • Observability & tracing
  • Security guardrails

5. Polish and Deploy

  • End‑to‑end smoke tests
  • CI/CD pipeline
  • Configure alerts

6. Next Level Preview

  • Self‑hosted VMS – Deploy the full stack (Flowise, Weaviate, n8n, Prometheus/Grafana, FastAPI/Node services, NocoDB) on a virtual‑machine cluster hosted on Hetzner Cloud, Hostinger VPS or any GCP/AWS/Azure instance.
  • Coolify orchestration – All services run as Docker containers managed by Coolify, giving you one‑click roll‑backs, environment variable vaults and built‑in SSL.
  • Zero‑trust security – Mutual TLS between containers, Vault‑managed secrets and OIDC for user authentication.
  • Enterprise observability – Replace the free‑tier Grafana with a self‑hosted Grafana + Loki + Tempo stack for logs, metrics and distributed tracing.


What You Gain

  • Production‑grade chatbot – Live lead‑gen bot that emails prospects in real time.
  • Reliability & fallback – Automatic retry, circuit‑breaker and dead‑letter queue so a single failure never drops a lead.
  • Observability from day 1 – Metrics & dashboards in Grafana Cloud (free tier) plus Prometheus counters for fallback rates, email and API latency.
  • Security guardrails – Prompt‑injection detection, API‑key‑protected webhooks and role‑based write rules in NocoDB keep your data safe.
  • Lead‑gen automation – Collected leads are stored instantly in a spreadsheet‑style NocoDB table and emailed to your sales team via a single Send_Email node (or a custom FastAPI/Node.js endpoint).
  • Code‑first extensibility – Swap any no‑code node for a self‑hosted FastAPI or Node.js micro‑service that runs on Coolify when you graduate to the Architect track.