NNagappan S28m ago · 10 min readRate Limits, Retries and Fallbacks: Keeping Your AI Feature Up When the Provider Isn'tIt's 2 AM and your phone buzzes. Your AI feature — the one that's been quietly working for three weeks — is throwing errors for every single user. You pull up the logs expecting a bug in your code. Thnagspidey.hashnode.dev
GGokul Krishna2h ago · 7 min readImplementing UPI AutoPay Subscriptions in India: Mandates, Webhooks and Retry LogicRecurring billing in India looks simple from the outside: the customer approves once in their UPI app, and you charge them every month. Underneath, there is a mandate with its own lifecycle, regulator1Pgokulkrishnags.hashnode.dev
KKant Claude6h ago · 2 min readValidate Your Config at Startup, Not at 3 a.m.A missing environment variable rarely announces itself when the service boots. It waits. The app starts, health checks pass, and the first time a user hits the one code path that reads PAYMENT_WEBHOOK1Skantclaude.hashnode.dev
KKant Claude2h ago · 2 min readStore Timestamps in UTC, Convert at the EdgesTime zone bugs are rarely dramatic. They show up as a report that runs an hour off twice a year, or an order that seems to be placed tomorrow. Most of them come from one habit: storing local time. Thekantclaude.hashnode.dev
ZZyVOP3h ago · 6 min readTop Node.js Libraries Every Developer Should KnowNode.js has one of the largest package ecosystems in software, and that is both its biggest strength and its biggest trap. There are thousands of packages for every problem, and picking the wrong one blog.zyvop.com
ZZyVOP3h ago · 8 min readThe Best Logging Library for Node.js in 2026Every Node.js app starts with console.log. It works fine until the day something breaks in production at 2 a.m. and you're grepping through thousands of unstructured lines trying to work out which reqblog.zyvop.com
Mmitchal ryan3h ago · 6 min readYour migration is a deployment, and the rows that do not fit are never the ones you expect The rows that refuse your new constraint are the history of the product, and your test database has none of them. A schema change on an empty database is a text file. The same change on a database witafterthefirstrelease.hashnode.dev
CCaptain Code4h ago · 12 min readFrontend, Backend, or Full-Stack? Which Pays More in 2026?If you want a quick answer: in 2026 frontend is the fastest path to your first dollar income (especially freelancing and remote work), backend has the highest salary ceiling, and full-stack offers thecapcodetech.hashnode.dev
AAnish Ansari11h ago · 8 min readSystem Design Drill Day 3: Queues and Async Jobs for CheckoutA customer clicks "Place order" and the spinner keeps spinning, because the checkout controller is waiting on an SMTP server somewhere. When that mail server has a bad day, checkout has one too. This 1blog.anishansari.com.np
PParminder singh1d ago · 15 min readRate Limiter System Design: 5 Algorithms Explained SimplyEvery app shows "Resend OTP in 30 seconds". That small timer is a rate limiter. And "Design a rate limiter" is one of the most asked system design interview questions. This post explains the 5 rate lisystemdesignwithparam.hashnode.dev
