03 / Engineering Notes
Notes on systems, runtimes, financial infrastructure and intelligent software.
2024-10-20 · Intelligent Systems
LLM Observability in Production with Langfuse
An AI feature without observability is a black box you're responsible for. Notes on tracing, latency tracking, cost monitoring, and prompt versioning for LLM calls running in production.
2025-05-05 · Backend Architecture
PostgreSQL Performance Tuning for Production
Query plans, indexing strategy, and connection pooling — the mechanics behind keeping a relational database fast once real traffic and real data volume show up.
2024-11-20 · Backend Architecture
Redis Caching Patterns for Production Applications
Caching is easy to add and easy to get wrong. Patterns for cache invalidation, stampede protection, and consistency that held up under real production read/write patterns.
2025-01-20 · Cloud & Reliability
Zero-Downtime Deployments in Kubernetes
Rolling updates, readiness probes, and graceful shutdown — the mechanics that let a deployment ship without a user ever noticing.