#Data Engineering

Honeywell AOG Zero: Building an APU Health Monitoring System in a Week

A hackathon case study on building a real-time aircraft APU health dashboard with Next.js, FastAPI, and PostgreSQL — and the trained ML model that never made it to production.

September 14, 20266 min read

Shipping Analytics Safely: Caching, Budgets, Deployment, and Handoff

User-scoped caching with TTLs, mutation-driven invalidation, rule-based budgets, Render deployment with health checks, and unambiguous mobile handoff.

September 12, 20265 min read

Making a Personal-Finance API Trustworthy: Tests, Isolation, and Balance Accounting

How to build an API that guarantees correct account balances, strict user isolation, and consistent analytics through isolated integration tests, immutable transaction rules, and cache invalidation.

September 8, 20265 min read