Закрыл вкладку — ушёл, обновил страницу — остался: присутствие в комнате на WebSocket
Когда человек закрыл вкладку, обновил страницу или потерял сеть, сервер получает один и тот же SessionDisconnectEvent , а реагировать должен по-разн…
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MongoDB Indexing Strategies: ESR Rule, Explain Plans, and Performance Tuning
title: "MongoDB Indexing Strategies: ESR Rule, Explain Plans, and Performance Tuning" published: true published_at: "2026-11-20T09:00:00+05:30" desc…
Building a Custom ERP Module on the MERN Stack: Data Modeling, Transactions and Audit Trails
ERP software handles money, stock, and approvals, so small bugs get expensive fast. A stock count that drifts by a few units or a rounding error in…
I ran Keploy on my MERN app. The scariest result was a green one.
Nine of my API tests were getting 401 Unauthorized instead of 200 . Keploy said the run passed. Exit code 0. That was the last thing I found. Here's…
Событие вместо поля: как журнал медиации вернул историю, которую система стирала
В феврале я написал три текста о том, что статусы не показывают процесс и что юридический сервис без событийной модели не масштабируется. В августе…
YApi заброшен с 2022 года. Я продолжил его и нашёл токены, которые может подделать любой участник проекта
YApi — платформа документации API, мок-сервера и тестов с 27 тысячами звёзд — не обновлялась с 2022 года. На новом Node.js у неё ломаются токены, кл…
The bug where every check passed and the data was still wrong
I'm building [ mongopg-migrate ], a tool that migrates MongoDB collections onto an existing Postgres schema you already designed. It's alpha pip ins…
Generalizing Transactions in NestJS: A Domain Port over TypeORM and MongoDB
Transaction control usually starts out tied to whatever implements it. An executor — a concrete class that opens a transaction over the project's OR…
Why Your MongoDB Check in Next.js Middleware Might Be Silently Failing
I mentioned this briefly in an earlier post on middleware patterns, that direct database queries don't run reliably in middleware, and a few people…
We Ditched MongoDB Atlas for AWS DocumentDB — Here's Exactly How We Did It
We Ditched MongoDB Atlas for AWS DocumentDB — Here's Exactly How We Did It One connection string change. Zero downtime. One very long night. Here's…
A backup you haven't restored isn't a backup
Migrating from MongoDB Atlas to a self-hosted replica set bought us control and cut our bill. It also quietly removed something we had stopped think…
An agent is a graph
This tutorial was written by Néstor Daza . This is the fourth article in a series about building Claudius , my own Claude-based chatbot ( Github ).…
Deploying a .NET Core API for Free in 2026: Railway vs Render vs Fly.io vs Cloudflare Tunnel
Why this comparison When I started building Sa, a car comparison platform for the Indian market, I had a working .NET Core Web API with MongoDB runn…
Optimizing Large-Scale MongoDB Aggregation Pipelines: A Deep Dive into Performance Strategies
Originally published on tamiz.pro . MongoDB's aggregation framework is a powerful tool for processing and transforming data. However, as datasets gr…
Optimizing Large-Scale MongoDB Aggregation Pipelines: Strategies for Performance at Scale
Originally published on tamiz.pro . MongoDB's aggregation framework is a powerful tool for processing and transforming data, but its performance can…
Why Meteor 3.5 Is the Most Important Release in Years
Every framework has a handful of releases that actually change its trajectory. For Meteor, 3.0 was one of them: it removed Fibers and rebuilt the fr…
How I Eliminated 19,494 Duplicate MongoDB Records (And What I'd Do Differently Today)
At a previous organization, I was handed ownership of a job platform serving 1,000+ users worldwide. Jobs on the platform could be scoped to a singl…
Meteor 3.5 is out!
Meteor 3.5 is a broad release, and it earns the word. Its center of gravity is the reactive data layer (the part of your app that runs in production…
Debugging a BSONVersionError in Mongoose: What It Actually Means and How I Fixed It
If you've been building backend services with Node.js and MongoDB long enough, you'll eventually run into an error that looks something like this: B…
# I Built a Full Stack Academic Management System for My College — Here's How
I Built a Full Stack Academic Management System for My College — Here's How For my B.Tech final year project, me and my team built Student Sphere —…
BSON and OSON: documents are designed to be nested, not flat
I like vendors benchmarks as they are often good illustrations of worst practice. Rather than focusing on real implementation trade-offs, they pick…
Free MongoDB GUI Tool for Developers, Students, and Teams
MongoDB is much easier to understand when you can actually see your data, not just read it on a screen. The whole point of VisuaLeaf is to make this…