Industrial Telemetry Data API

Portfolio-ready NestJS backend for querying historical process telemetry.

Ownership and Delivery

This project was built entirely by me and delivered to a Swedish client within 2 weeks.

Highlights

• Versioned REST API (v1 and v2)
• Time-series query endpoints for tags, metadata, and latest values
• TypeORM + PostgreSQL/TimescaleDB data model
• Swagger docs available at /api

Tech Stack

• Node.js
• TypeScript
• NestJS
• TypeORM
• PostgreSQL

Local Setup

cd data-api
npm install
cp .env.example .env
npm run start:dev

The service starts on http://localhost:3001 by default.

Configuration

Environment variables used by the app:

• DB_HOST
• DB_PORT
• DB_USER
• DB_PASS
• DB_NAME
• PORT (optional, default 3001)
• CORS_ORIGINS (optional CSV, default http://localhost:3000)

Testing

npm run test
npm run test:e2e

Notes

This repository is a sanitized portfolio version. Infrastructure, deployment pipelines, and raw production-like datasets were removed or replaced with synthetic examples.