YYamaninblog.yamansarabariya.com.np·1d ago · 7 min readOur AI examiner was a black box. SigNoz told us what a student actually costsHi, I am Yaman, co-founder of Mockacad. We are building a universal adaptive mock test preparation platform. Students use it to prepare for exams like IELTS, PTE, SAT, JFT and many more, and two of ou21R
OBOlajumoke Boladale-lawalinjutivia.hashnode.dev·20h ago · 5 min readScheduling Isn't a Timestamp Problem, It's a Reconciliation ProblemI recently had to implement a job scheduling system for a project where campaigns needed to automatically become active and inactive at predefined dates. The requirement was simple: activate a campaig00
MTMd Tarikul Islaminfreecodecamp.org·2d ago · 20 min readHow to Implement PayPal in a Microservice Architecture Using NestJS, gRPC, and DockerIn this tutorial, you'll build a production-ready PayPal payment service using NestJS microservices. Along the way, you'll learn how to isolate payment logic into its own service, communicate between 00
DEDavid Essienindavid-essien.hashnode.dev·2d ago · 22 min readHow to Authenticate Users with Solana Wallets in NestJSLet's talk about wallet based auth in NestJS. What this is, is basically an auth system where the user is authenticated and authorized based on their web3 wallet. We'll be doing this with a Solana wal00
DEDavid Essienindavid-essien.hashnode.dev·2d ago · 10 min readBuilding Secure JWT Auth in NestJS: Argon2, Redis Blacklisting, and Token RotationImagine you've just watched your first tutorial on authentication. You spin up a login flow, add some JWTs, and call it done. Then you push to production and realize those tutorials skipped the hard p00
RRainbowZhouinrainbow-backend-lab.hashnode.dev·Jul 10 · 14 min readBuilding a Balatro-like Backend from Scratch: Project Plan and Poker Hand EvaluatorThis is the first implementation article in my Building a Balatro-like Backend series. I am building a Balatro-like card game backend from scratch with Node.js, TypeScript, NestJS, and WebSockets. The00
PPPranav Pandeyinpranavdev.hashnode.dev·Jul 6 · 8 min readThe Monorepo Glue: pnpm, Metro, and NestJS in One WorkspaceThe previous post covered why Expo earned its place in a white-label mobile stack — how app.config.js replaces per-tenant Xcode projects, how OTA updates create a middle release tier, how a shared com00
MMMarrouchi Mohamedinblog.hexabot.ai·Jun 26 · 13 min readWhy Self-Hosted AI Workflow Automation Matters?AI workflow automation is quickly becoming one of the most important layers of modern business software. Teams no longer want simple scripts that move data from one app to another. They want AI system52JS
PMPeace Melodiinpeacemelodi.hashnode.dev·Jun 22 · 5 min readBuilding a Flash Sale Engine That Cannot Oversell: Distributed Locking and Optimistic Concurrency in NestJSThe problem flash sales create Flash sales create one of the most unforgiving concurrency problems in backend engineering. Thousands of people request the same limited stock in the same instant. If tw10
PMPeace Melodiinpeacemelodi.hashnode.dev·Jun 19 · 2 min readWhat I Learned Building an Open Source CLI Tool for NestJSWhat I learned building create-nest-pro, an open source CLI tool that scaffolds a production ready NestJS project in seconds. I spent time trying to make npm i and npx behave the same way and eventual10