--- title: "rayyan asghar (@rayyanbey) | Hashnode" description: "Full Stack Developer. Read the latest articles by rayyan asghar on Hashnode." url: "https://hashnode.com/@rayyanbey" --- @rayyanbey # rayyan asghar @rayyanbey · Lahore · Joined August 2024 Full Stack Developer [Website](https://rayyan-web.vercel.app/) ### [Express JS version 5: key updates & features](https://rayyanbey.hashnode.dev/express-js-version-5-key-updates-features?utm_source=hashnode&utm_medium=feed) Express.js is a popular web framework for Node.js, known for its simplicity and flexibility. For a long time, developers have relied on Express v4, but with new web standards and a push for better performance, Express.js v5 introduces some exciting u... 3 min read · [rayyanbey.hashnode.dev](https://rayyanbey.hashnode.dev/express-js-version-5-key-updates-features?utm_source=hashnode&utm_medium=feed) [Oct 21, 2024](https://hashnode.com/posts/express-js-version-5-key-updates-features/67165923eb45a676e0ed5ac9) ### [MongoDB aggregation pipelines](https://rayyanbey.hashnode.dev/mongodb-aggregation-pipelines?utm_source=hashnode&utm_medium=feed) In this article, we will delve into a crucial aspect of MongoDB: aggregation pipelines. Aggregation pipelines are a powerful feature in MongoDB that enables complex data transformations and analysis, similar to operations like JOINs, SELECT, and GROU... 3 min read · [rayyanbey.hashnode.dev](https://rayyanbey.hashnode.dev/mongodb-aggregation-pipelines?utm_source=hashnode&utm_medium=feed) [1](https://hashnode.com/posts/mongodb-aggregation-pipelines/66b20bc982069b4c678c994d) [Aug 6, 2024](https://hashnode.com/posts/mongodb-aggregation-pipelines/66b20bc982069b4c678c994d) ### [Difference Between Access and Refresh Tokens](https://rayyanbey.hashnode.dev/access-and-refresh-tokens?utm_source=hashnode&utm_medium=feed) All you need to know about access and refresh tokens using Express JS and Mongoose (ODM of MongoDB) 2 min read · [rayyanbey.hashnode.dev](https://rayyanbey.hashnode.dev/access-and-refresh-tokens?utm_source=hashnode&utm_medium=feed) [Aug 5, 2024](https://hashnode.com/posts/access-and-refresh-tokens/66b08248d408e9002a3a8cfe)