Engineering notes — things I keep re-explaining, written down once.
- Duplicate deliveries and dead letters: the retry queue behind late webhook callbacks
- Choosing a Transactional SMS Alerts API for SaaS Across the US and EU
- LLM Structured JSON Extraction: Schema Validation, Parse Errors, and Retries
- Cheap Node.js Summarization APIs: Chunking Long Text and Estimating Token Cost
- A Safer PDF RAG Pipeline: Embeddings, Page Reranking, and the Final Summary
- Choosing an Email API for Bounce Handling, Complaint Suppression, and Deliverability Monitoring
- Scheduled cleanup that calls a rate-limited API: cron, a queue, and webhook backpressure