Hussein Nasser (@hnasr) / X

Hussein Nasser

21.8K posts

Hussein Nasser

@hnasr

Backend and Database Courses courses.husseinnasser.com YouTube youtube.com/@hnasr Author of Root Cause amzn.to/4cfQjJj Engineer @esri

California, USA

courses.husseinnasser.com

Joined July 2010

Pinned
Hussein Nasser
@hnasr
Apr 15
I wrote a new book that has been in the works for years. It is called Root Cause, and it is for those who enjoy the art of backend engineering. Early in my career, 20 years ago, I built backend and database applications without fully grasping their inner mechanics. Performance
52K
Hussein Nasser
@hnasr
Nov 2, 2024
Article
How to Become a Good Backend Engineer (Fundamentals)
I have been a backend engineer for over 20 years and I have witness technologies come and go. One thing however, always remains constant: The first principles the tech is built on. I don’t really mean...
699K
Hussein Nasser
@hnasr
Dec 3, 2022
I thought I understood how VPNs work until I saw this diagram. I’m not even close
Hussein Nasser
@hnasr
Oct 15, 2024
Uber moves to MySQL 8.0, reducing 94% of the lock time. Thanks to MySQL 8's new B+Tree locking model which I talked about in another post. First time I see the payoffs of that impressive design in a production shop.
310K
Hussein Nasser
@hnasr
May 6, 2023
Amazon Prime Video Replaces Microservices with a Simplified Monolith in their Live Stream Monitoring Service, Resulting in a 90% Architecture Cost Reduction. The team accomplished this by: - Pinpointing Overhead in the Distributed System - Combining Tightly-Coupled
732K
Hussein Nasser
@hnasr
Mar 13, 2025
Being humble is just another form of ego.
233K
Hussein Nasser
@hnasr
May 17, 2023
What is the difference between the two urls? one has an @ and one doesn't. But also the first downloads version 15 of postgres from GitHub and the second one resolves to v15 dot zip domain which can also downloads a zip file that sure doesn't have postgres in it. You see,
541K
Hussein Nasser
@hnasr
Sep 7, 2023
Its been a year and seriously this is one of the most interesting tech migrations stories. Cloudflare ditching NGINX At first glance I thought: what is wrong with NGINX? So let me summarize and I’ll link up the article and my full video coverage if you want to learn more
454K
Hussein Nasser
@hnasr
Apr 25, 2025
Article
It’s not you, modern software does feel slow
You may have felt it. From chatting apps such Teams or discord, to browsers like Chrome and Firefox, and even Gaming. Software feels sluggish and slow even on most beefy hardware. While hardware has...
405K
Hussein Nasser
@hnasr
May 14, 2023
Shopify increased their write throughput by 50% moving one of their MySQL keys from UUID to ULID. But How? When you make a purchase, Shopify guarantees idempotency by having the client uniquely tagging the request using UUID. If you accidentally replay the request and they
551K
Hussein Nasser
@hnasr
Mar 11, 2023
Discord engineering has migrated from Cassandra to ScyllaDB. I made a video doing a deep dive on their well written blog on how they improved the performance storing trillions of messages.
544K
Hussein Nasser
@hnasr
Mar 13, 2023
A protected resource is granted to a third party service via an auth grant. The code is used to get a long lived refresh token. A short lived access token is created from the refresh token that can be used to get the resource. When the access token expires the service uses its
338K
Hussein Nasser
@hnasr
Mar 26, 2023
How to Become a Good Backend Engineer by understanding first the following fundamentals. - Communication Protocols - Web Servers - Database Engineering - Proxies - Messaging Systems - Message Formats - Security
340K
Hussein Nasser
@hnasr
Apr 7, 2023
The detailed networking behind clicking a link When you click on a hyperlink, your browser loads the link’s content from a remote server and renders it. Behind the scenes much is happening including, connection establishement, session encryption, protocol negotiation,
409K