Engineering notes — things I keep re-explaining, written down once.
- Reconciliation-First Node.js Design for Multiple-Document Batch Summarization
- Audit and Compare Customer Support Chatbot LLM API Economics
- Simple Uptime Failure Alerts: Health Endpoints, Metrics Polling, and Heartbeats
- Small SaaS Email Deliverability: Custom Domains, Warmup, Suppressions, and Bounces
- Metrics Dashboard APIs for SaaS Apps: PostHog, Grafana Cloud, Datadog, and Prometheus
- Picking a message queue for failed job retries: dead letter queues, idempotent consumers
- Choosing a daily cleanup job: cron expressions for old uploads, logs and stale records