Technology

PostgreSQL

Everything on this site involving PostgreSQL — projects, articles, research and tools.

Business Systems$249

AI Invoice Processing System

The complete document processing system: per-field confidence, arithmetic validation, a human review queue, and correction feedback.

v1.4.0Python · Claude API · PostgreSQL
Automation Lab

Automation That Survives Monday Morning

Most business automations break quietly within a month. Idempotency, error handling and observability are what separate a demo from a system.

IntermediateDifficulty: Intermediate2 min readPython · n8n · Power Automate
AI Systems

AI Research & Fact-Checking System

A research agent that decomposes a claim, gathers evidence from multiple sources, cross-checks agreement between them, and refuses to answer when the evidence is thin.

AdvancedDifficulty: Advanced~20h buildPython · LangGraph · Claude API
VideoCode
Business Systems

AI Invoice Processing System

An invoice pipeline that extracts structured data, scores its own confidence per field, and routes anything uncertain to a person — because 95% accuracy on invoices is a finance problem.

IntermediateDifficulty: Intermediate~14h buildPython · Claude API · PostgreSQL
Code
UDEMY$89

Business Automation Engineering

Process design, idempotency, error handling and observability — the engineering discipline that separates a workflow demo from a production system.

IntermediateDifficulty: Intermediate★ 4.68h940 studentsPython · n8n · Power Automate