Node.js Scheduled Enqueue Example: A Queue Alternative for Background Reports
Put the schedule and the work in separate processes: let a cron trigger enqueue a small, idempotent job record, then let queue workers claim that re…
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Preventing Duplicate Node.js Notifications Across Bulk Email, SMS, Queues, and Pollers
Short answer: put each event into a durable notification outbox, let a queue worker claim small batches, and use cron polling only as a recovery tri…
Idempotency for Reliable APIs
Why idempotency matters When you build an API, retries are inevitable. Clients lose connections, timeouts happen, and users double-click buttons. Wi…
Next.js + Node.js: Where Do You Draw the Line?
I've been building a few applications with Next.js and Node.js, and one thing I keep coming back to is: How much backend logic should actually live…
Stop writing raw SQL in your migrations (most of the time)
Something I keep seeing across teams, especially with people who are getting comfortable with tools like db-migrate or Kysely , is a very specific h…
A test said the server started. I deleted the server. It still passed.
Here is a test from a real, well run Node project: test ( ' server starts ' , async ( t ) => { const app = build () await app . listen ({ port :…
Recovering a Rate-Limited Worker Pool for Scheduled Data Cleanup in Node.js SaaS
Short answer: use a scheduled HTTP trigger to start a bounded cleanup run, then drain a queue-backed worker pool when the e-commerce workload is lar…
Third-party APIs don't fail loudly — they return less
For several days, my service was quietly broken and every health check said it was fine. No exceptions. No 5xx. No alerts. The upstream API returned…
Environment Config the Clean Way
Stop Hardcoding, Start Centralizing We've all been there: const apiUrl = 'https://staging.example.com' sitting at the top of a random file. Then som…
Rate-Limited Worker Queues for Timezone-Aware User Reminders in Node.js
Short answer: treat local calendar time as schedule data, store the next due instant in UTC, and let a short dispatcher feed a rate-limited worker p…
When batch traffic competes with interactive LLM requests
Not all LLM traffic is equally urgent. A user waiting for a response cares about the next few seconds, whereas a batch task summarizing thousands of…
You Can Retry a Write. You Cannot Retry an Email.
I run Upwork Scout , a small SaaS that watches Upwork and emails you only the jobs that fit you. The whole product is one cron endpoint. It wakes up…
Migrating from Java to JavaScript/TypeScript? Here's how to map your stack
Moving services from Java (Spring Boot) to Node.js / TypeScript is a common transition when engineering teams want faster iteration speeds, unified…
A user spent a day confirming an email that was already confirmed
A user spent a day confirming an email address that was already confirmed, because my API kept telling him to. He was right and my error message was…
Frame-accurate FFmpeg trimming without re-encoding the whole file
TL;DR -c copy can only cut on keyframes, so your 12.4s trim starts wherever the last keyframe was. We'll build a smart-trim script that probes keyfr…
Build a resumable video migration worker: ledger, bounded concurrency, 429 backoff
TL;DR We're building a migration worker that moves a video library into a hosted video API without tripping rate limits or double-creating assets. S…
Announcing the MailKite Server developer API: use the client against your own server
MailKite Server now has a developer API that can replace the hosted API for its core send-and-receive path. The practical result is small: point the…
Past the README Demo: Conversations, Healthcare Data, Agents, and CI Checks
"Extract a name and email from this sentence" is the easy 10% of structured output. The other 90% is everything that doesn't fit in one prompt, one…
SMS Alerts API for US/EU SaaS: Auditable Transactional Delivery in Node.js
Short answer: for a gaming SaaS compliance notice, choose the SMS alerts API that gives you durable message state, delivery webhooks, and regional p…
Why do some developers compare PHP and NodeJS?
Why do developers compare PHP and Node.js? (Spoiler: One is a language, the other is a magician’s hat) And why most people don’t actually know what…
Fintech Shipment Fan-Out: SaaS Retention Cleanup and the Node.js Cron-Queue Boundary
Short answer: use a scheduled cleanup endpoint when one indexed, bounded pass can finish predictably; use a queue when cleanup must be divided into…
RFLCT: Bringing Runtime Type Metadata to TypeScript 7
If you've built large-scale applications in TypeScript, chances are you've used a Dependency Injection (DI) container. As the creator of InversifyJS…
Rate Limiting Basics: Protecting Your API from Abuse
Why Rate Limiting Matters Every public API eventually faces abuse. It could be a malicious script hammering your endpoints, a misconfigured client r…
Node.js Worker Troubleshooting: Background Queue Retry Exhaustion
A retry loop is an availability problem before it is a queue-setting problem: it can spend all worker slots on work that cannot succeed and raise th…
Building a Chat-Based Sales Bot That Doesn't Drop Messages During Flash Sales
Originally published at parvejshah.com/blog/conversational-commerce-webhook-architecture by Parvej Shah . In Bangladesh and much of South and Southe…
How I built an in-memory explicit content filter in Node.js (200ms latency, zero images saved)
If you allow user-generated content in your app, you eventually run into a massive liability problem. Users will upload NSFW images. I ran into this…
The Node.js Event Loop, Explained Simply (with Examples)
"Node.js is single-threaded" — you've heard it a hundred times. So how does it handle thousands of requests at once without freezing? The answer is…
I built an RPG that teaches Claude Code by making you actually use it
Most tool documentation teaches by just telling you things. You read a page about /model , or hooks, or subagents, nod along, and forget it by the t…
How Many Builds Can Run at Once on One VPS
The number is not a property of your deployment tool. It is your server's available memory divided by what one build takes at its peak, and every an…
I built a zero-dependency CLI to audit hreflang (international SEO)
If your site serves multiple languages, hreflang is where SEO quietly breaks: page A links B, B never links back; someone writes en_US instead of en…