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SLI Design — Picking Metrics That Actually Correlate With User Experience
Wrong SLI metrics mean green dashboards while users churn. The discipline of picking signals that move with what users actually feel, and the ones that look reliable but lie.
Cross-Cloud Identity Federation — Patterns That Replaced Our Long-Lived Keys
OIDC federation between AWS, GCP, and CI providers let us delete every long-lived cloud credential we had. The setup, the gotchas, and the trust-relationship discipline.
Hybrid Search — Combining BM25 and Embeddings for Better RAG
Pure vector search misses exact-keyword queries. Pure BM25 misses semantic ones. Combining them with reciprocal rank fusion is the simplest large win in RAG retrieval.
Handling Vulnerabilities in Production — What We Actually Do
You always have known vulnerabilities. The question is how you triage, patch, and respond. The discipline we run after a few real incidents and a lot of routine work.
Proxy vs Reverse Proxy vs Load Balancer — What's Actually Different
Three terms that get mixed up constantly. The actual differences, where each one sits in the request path, when you reach for which, and where the same tool plays all three roles.
Database Backups — Testing Restores, Not Just Taking Them
Backups are easy. Restores are hard. The quarterly drill we run, what's failed during it, and the discipline that makes "we have backups" actually mean something.
Helm Chart Anti-Patterns We've Stopped Using
Helm gives you a lot of rope. The patterns we used that backfired, the ones we replaced them with, and what to skip if you're starting today.
CDN Cache Invalidation — Strategies That Don't Break in Production
There are two hard problems in computer science." We've worked on the cache-invalidation one for a while. The patterns that hold up at scale and the ones that look clean and aren't.
Embeddings Drift Detection — When "Similar Enough" Stops Being Similar
Embedding indexes degrade silently. The signals that catch drift, how often to re-embed, and the operational patterns we built after one quiet quality regression.
Job Queues — Sidekiq, Celery, BullMQ Patterns That Hold Up
We run three different job queue systems across our services. The patterns that work across all of them, the differences that matter, and the operational gotchas.
systemd Timers vs Cron — What We Learned Switching
We migrated most scheduled jobs from cron to systemd timers. The wins, the gotchas, and the cases we kept on cron anyway.
AWS Step Functions for Workflow Orchestration
We use Step Functions for batch processing, document ingestion, and a few agentic workflows. The patterns that work, the limits we hit, and where we'd reach for something else.