Khalil Stemmler | Advanced TypeScript & Node.js best practices for large-scale applications

My book on Node.js / TypeScript software design and architecture just pre-launched 📕 (%33 off)!

SOLID: The Software Design & Architecture Handbook

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I'm Khalil. I teach advanced TypeScript & Node.js best practices for large-scale applications. Learn to write flexible, maintainable software.

I create courses, books, and articles for aspiring developers on Enterprise Node.js, Domain-Driven Design, GraphQL, and writing testable, flexible JavaScript.

Recent Articles

Absolute and Relative Complexity Software Professionalism

Determining if the complexity of a problem is related to the nature of the problem or related to the way that we approach solving ...

Enforcing Coding Conventions with Husky Pre-commit Hooks Tooling

guides typescript prettier formatting

In this guide, we'll learn how to setup Husky to prevent bad git commits and enforce code standards in your project.

How to Deploy a Serverless GraphQL API on Netlify [Starters]GraphQL

tutorial netlify graphql serverless starters

Exploring two starter projects you can use to deploy a serverless GraphQL API on Netlify with or without TypeScript.

How to Get the Currently Playing Song using the Spotify Node.js API & TypeScript Web Development

spotify tutorial music

A quick and straightforward guide to hooking into the Spotify's awesome API to show the current song that you're listening to. It ...

Domain-Driven GraphQL Schema Design | Enterprise GraphQL GraphQL

domain-driven design professionalism project planning

A GraphQL schema is a declarative, self-documenting, organization-wide API. It's pretty important to spend a little bit of time on...

How I Write Testable Code | Khalil's Simple Methodology Software Design

software design dependency injection dependency inversion professionalism

The single biggest thing that improved the quality of my designs was understanding how dependencies influence my ability to write ...

GraphQL's Greatest Architectural Advantages GraphQL

graphql architecture software design restful apis

There's a lot of advantages to using GraphQL instead of REST on your server, and there's a lot of advantages to using Apollo Clien...

Why Event-Based Systems? | Enterprise Node.js + TypeScript Enterprise Node + TypeScript

event-based systems architecture enterprise software

There are so many reasons why event-based systems are the standard for large-scale enterprise applications like GitHub, Facebook, ...

How Apollo REST Data Source Deduplicates and Caches API calls [Deep Dive]GraphQL

apollo server graphql

Apollo's REST Data Source does a lot more than you'd think behind the scenes, and that's why it's recommended instead of using a w...

How to Setup a TypeScript + Node.js Project TypeScript

guides typescript starters

In this guide, we walk through the process of creating a TypeScript project from scratch with cold-reloading, and scripts for buil...

Where Do Domain Events Get Created? | Domain Driven Design w/ TypeScript Domain-Driven Design

ddd domain entities software design domain events

In this post, I explain how good ol' fashioned encapsulation + TypeScript getters and setters enable us to effectively create Doma...

My book on Node.js / TypeScript software design and architecture just pre-launched 📕 (%33 off)!

SOLID: The Software Design & Architecture Handbook

Presale $24.99

Recent Blogs

The Three Responsibilities of a Client-Side State Management Solution

May 14th, 2020 / 2 min read

Historically, when starting on a new React project, we’ve had to design and implement the state management infrastructure from scratch in a…

Enforcing Coding Conventions with Husky Pre-commit Hooks

Mar 10th, 2020 / 5 min read

Intro On most projects I've ever worked collaboratively on, someone takes the role of the code cleanliness champion. It's usually the team…

How to use Prettier with ESLint and TypeScript in VSCode

Mar 8th, 2020 / 9 min read

Intro In the previous article in this series, "How to use ESLint with TypeScript", we learned how add ESLint to our project and configure it…

How to use ESLint with TypeScript

Feb 26th, 2020 / 9 min read

Intro Formatting is one of several concerns in the efforts to write clean code. There's a lot of other stuff we should be concerned about as…

Recently Edited Wikis

The Dependency Rule

Updated Mar 28th, 2020 / 4 min read

solid architecture design principles

A software architecture rule that specifies the relationship between layers, namely that an inner layer should never rely on anything from an outer layer.

Camel case

Updated Mar 7th, 2020 / 2 min read

coding conventions

Camel case is a naming convention that says all words in an indentifier (except the first) must be capitalized.