Spot-Undoo: Privacy-First AI Kerala Micro-Travel Planner & Layover Explorer
This is a submission for the Hacktoberfest Open-Source AI Challenge: Week 2 - Side Hustle . 🌟 What I Built Spot-Undoo is an open-source, local-first…
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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…
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…
Cloning a staging MongoDB and MySQL to your laptop without installing a single database client
Every week someone on my team needs a copy of our staging data on their laptop. Two databases, MongoDB and MySQL, a few gigabytes. For years the ans…
🚀 Building a First Full-Stack User Management System with React, Node.js & MongoDB
Why I Started Building This Project I'm currently learning full-stack web development, and instead of only following tutorials, I decided to build a…
1,890,595 MongoDB Service Matches: The Default-Configuration Problem at Internet Scale
1,890,595 MongoDB Service Matches: The Default-Configuration Problem at Internet Scale MongoDB has supported authentication for many years, and its…
DocumentDB 0.109: $match $sort $limit $project covered by index scan
This should have been the first post of this series. A few months ago, I demonstrated ( video ) what I see as one of the key advantages of a documen…
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…
DocumentDB 0.116: $sort $group prefix pushdown
DocumentDB 0.116-0, released August 20, 2026, introduced prefix sort pushdown for $group accumulators. It lets the grouping stage consume rows in th…
Multiplayer Game Development with TypeScript, Phaser, Socket.io, and MongoDB
Game data rarely looks the same for very long. A player document might start out with just a username and a score, and a few sprints later, it needs…
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…
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…
MongoDB from One Machine to a Multi-Region Cluster
A beginner's guide to where data lives, how capacity grows, and what Atlas manages MongoDB can begin as one database process on one computer. As an…
Why Request Context Becomes Infrastructure in Multi-Tenant Node.js Applications
A multi-tenant Node.js application often starts with something that looks harmless: const tenantId = req . headers [ " x-tenant-id " ]; You resolve…
1.8 Million Reachable MongoDB Services: Reading Exposure Numbers Without Overreading Them
1.8 Million Reachable MongoDB Services: Reading Exposure Numbers Without Overreading Them A ZoomEye query for service="mongodb" returns 1,868,598 ma…
SQL vs NoSQL: Kenapa PostgreSQL Masih Jadi 'Swiss Army Knife' di 2026
SQL vs NoSQL: Kenapa PostgreSQL Masih Jadi 'Swiss Army Knife' di 2026 Sering kali kita terjebak dalam perdebatan klasik antara SQL dan NoSQL. Ada an…
Архитектура универсального провайдера баз данных на TypeScript без JDBC
В зрелых корпоративных экосистемах вроде Java или .NET инструменты для работы с базами данных опираются на стандартизированные на уровне среды выпол…
MongoDB Aggregation Pipelines: Stage Order Is the Win
[ EXECUTIVE TEARDOWN // TL;DR ] Put $match first and on indexed fields — every document eliminated early is one the rest of the pipeline never touch…
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…
Making an application operable by an AI agent
The usual way to give an agent access to an application adds a layer: custom endpoints, logic rewritten so a model can follow it. Two issues he open…
Building DreamHome: A Modern Real Estate Platform with the MERN Stack
Building DreamHome: A Modern Real Estate Platform with the MERN Stack By Dhrumil Gajjar — Full-Stack MERN Developer based in Gandhinagar, Gujarat Th…
"The write was acknowledged" means less than you think
I spent years operating databases for payment platforms, where a lost write isn't a bug, it's a regulatory conversation. That environment teaches yo…
Не заводите вторую базу ради объектов: redb против MongoDB и RavenDB
Объектное хранилище с типами, деревьями и настоящим SQL прямо в вашей PostgreSQL/MS SQL/SQLite. FK на объекты, EF и Dapper рядом. redb против Mongo…
From MySQL to MongoDB in Spring Boot — Everything That Changed in My Code
In my last post I wrote about an error that cost me a full evening: my pom.xml had the MongoDB starter, but my code was still full of JPA annotation…
Mongodb Partitioning
At Whoz , we build a SaaS platform that helps professional services companies manage their talent staffing. At the heart of our product lies a conce…
You loved my markdown previewer, so I’m giving it a major upgrade.
Building a smooth, lovely experience isn’t just about rich text rendering—it’s about ensuring the database layer under the hood is as fast, flexible…
You loved my markdown previewer, so I’m giving it a major upgrade.
Building a smooth, lovely experience isn’t just about rich text rendering—it’s about ensuring the database layer under the hood is as fast, flexible…
Как за 5 недель построить рекомендательную систему в TravelTech: Kafka и MongoDB вместо Feature Store
Привет! Меня зовут Кристина, я MLOps-инженер в Туту. Занимаюсь тем, что помогаю рекомендательным системам добраться до прода со всеми компромиссами,…