https://www.prashantdasari.com/blog Guides on NestJS, PostgreSQL, Redis, BullMQ, Elasticsearch and Core Web Vitals by Prashant Dasari. en-us https://www.prashantdasari.com/blog/bullmq-essentials-background-jobs-backend-developers https://www.prashantdasari.com/blog/bullmq-essentials-background-jobs-backend-developers Thu, 16 Jul 2026 06:20:00 GMT BullMQ Move slow work out of the request with BullMQ: queues, jobs, workers, retries with backoff, cron jobs, a dead letter queue, and NestJS setup. https://www.prashantdasari.com/blog/elasticsearch-essentials-backend-developers https://www.prashantdasari.com/blog/elasticsearch-essentials-backend-developers Thu, 16 Jul 2026 06:10:00 GMT Elasticsearch How Elasticsearch finds text fast: shards, the inverted index, Query DSL, analyzers, filters vs queries, aggregations, and how it sits beside PostgreSQL. https://www.prashantdasari.com/blog/redis-essentials-backend-developers https://www.prashantdasari.com/blog/redis-essentials-backend-developers Thu, 16 Jul 2026 06:00:00 GMT Redis Redis is more than a cache. Which of its five core data types fits which job, plus TTL, cache-aside, sessions, rate limiting, Pub/Sub and persistence. https://www.prashantdasari.com/blog/nestjs-sequelize-orm-postgresql-guide https://www.prashantdasari.com/blog/nestjs-sequelize-orm-postgresql-guide Thu, 16 Jul 2026 05:50:00 GMT Database Connect NestJS to PostgreSQL with Sequelize: models, migrations, relations, validators, hooks and transactions, plus the settings that bite in production. https://www.prashantdasari.com/blog/postgresql-database-essentials-backend-developers https://www.prashantdasari.com/blog/postgresql-database-essentials-backend-developers Thu, 16 Jul 2026 05:40:00 GMT Database The PostgreSQL basics you'll use every week: keys, joins, indexes, transactions, normalization, and when JSONB or full-text search is enough. https://www.prashantdasari.com/blog/nestjs-react-auth-signup-login-sessions https://www.prashantdasari.com/blog/nestjs-react-auth-signup-login-sessions Thu, 16 Jul 2026 05:30:00 GMT NestJS Signup and login between NestJS and React: bcrypt hashing, JWTs, CORS, where to keep the token, and protecting routes on both sides. https://www.prashantdasari.com/blog/building-your-first-nestjs-api-validation https://www.prashantdasari.com/blog/building-your-first-nestjs-api-validation Thu, 16 Jul 2026 05:20:00 GMT NestJS Build a NestJS API from scratch: install the CLI, add GET and POST routes, then use class-validator so a string like "hello" can't break your math. https://www.prashantdasari.com/blog/nestjs-fundamentals-controllers-services-modules https://www.prashantdasari.com/blog/nestjs-fundamentals-controllers-services-modules Thu, 16 Jul 2026 05:10:00 GMT NestJS How a request moves through NestJS: controllers, services, modules and DI, plus where pipes, guards, interceptors and filters fit, with code. https://www.prashantdasari.com/blog/what-is-a-server-client-server-model-explained https://www.prashantdasari.com/blog/what-is-a-server-client-server-model-explained Thu, 16 Jul 2026 05:00:00 GMT Backend Basics A server is a program that waits for requests and answers them. How clients find it with DNS and ports, and the request loop under every backend. https://www.prashantdasari.com/blog/learning-backend-nestjs-postgresql-redis-bullmq-elasticsearch https://www.prashantdasari.com/blog/learning-backend-nestjs-postgresql-redis-bullmq-elasticsearch Wed, 15 Jul 2026 21:35:00 GMT Backend Five backend tools, one job each. A plain map of what NestJS, PostgreSQL, Redis, BullMQ and Elasticsearch do, and how a request moves through them. https://www.prashantdasari.com/blog/core-web-vitals-page-speed-technical-seo-guide https://www.prashantdasari.com/blog/core-web-vitals-page-speed-technical-seo-guide Wed, 15 Jul 2026 21:35:00 GMT Performance & SEO What LCP, INP and CLS measure, what makes each one bad, and how to fix them, plus the technical SEO basics that decide whether a fast page gets indexed.