Overview

Petwatch helps reunite lost pets with their owners. Users can report a lost pet or report a found animal on the street. Geospatial matching surfaces nearby reports so people can connect.

The app also includes a poster generator — it produces a print-ready PDF optimised for visibility on the street, with a QR code that links directly to the pet’s report.

Built entirely from scratch: product, frontend, backend, and infrastructure.

Frontend

• Next.js deployed on Cloudflare Workers for edge performance
• Full TypeScript throughout

Backend

• NestJS REST API with TypeScript
• PostgreSQL with PostGIS for geospatial queries (nearby reports, radius search)
• PDF generation for the poster feature with embedded QR codes
• Clean architecture, domain-driven design

Infrastructure

• Self-hosted Kubernetes cluster on a VPS
• ArgoCD for GitOps-based CI/CD — git push to deploy
• Grafana stack for observability: metrics, logs, dashboards
• Cloudflare for DNS, edge caching and Workers deployment