Your message was accepted. Has the customer actually received it?
Build accurate WhatsApp delivery tracking from API acceptance and status events. Handle duplicates, delayed events and conflicting outcomes in Node.js.
Bankole Emmanuel
The customer paid, but the order still says unpaid
Use payment webhook reconciliation to recover paid orders after lost redirects or delayed events. Verify the original payment and make updates repeatable.
One chat message triggers dozens of queries. Change the read model.
Improve conversation database design with a bounded state row and an indexed context query. Inspect real SQLite query plans in the runnable example.
“Something like this, but cheaper”: build a useful product search
Build AI product search that respects budget, size and availability. Separate hard filters from ranking and test the decision flow with Node.js.
Two workers use one wallet. Stop nonce collisions and blocked sends.
Build Ethereum nonce management around a per-wallet dispatcher and durable reservations. Test competing local allocations and replacement identity in Node.js.
MongoDB vs PostgreSQL: A Practical Guide for SMEs (When to Use Each, Pros/Cons, and Scale Limits)
If you’re building a product, app, or internal system, your database decision is one of the most important technical choices you’ll make. It affects speed, cost, reliability, and how easily you can scale. Two of the most popular options today are MongoDB and PostgreSQL. This guide breaks them down in simple terms—no jargon—so you can … Read more
The order was saved, but its queue job disappeared
Build a transactional outbox Node.js example that saves orders and events together. Test rollback, relay replay and consumer deduplication with SQLite.
Your shopping assistant recommends stock you no longer have
Keep AI shopping assistant inventory accurate without making every lookup live. Build freshness checks and revalidate stock before committing an order.
Two customers buy the last item. Reserve stock without overselling.
Build an inventory reservation Node.js example with conditional updates, unique request IDs and safe release. Test the last-item failure locally.
Your AI agent calls six tools for a simple question. Cut the waste.
Improve AI agent tool routing with deterministic shortcuts, bounded fallback and request-scoped reuse. Test the routing decisions in Node.js.