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

Presale $24.99

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

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

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

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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

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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

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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

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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

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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

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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...

Books that Developers Should Read in 2020 [List]Software Professionalism

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These books “are basically cheat codes” for leveling up your skills and knowledge as a developer.

How to Setup a TypeScript + Node.js Project TypeScript

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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

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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

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…

Deploying Serverless GraphQL APIs with TypeScript on Netlify

Feb 23rd, 2020 / 2 min read

Deploying a Serverless GraphQL API with TypeScript is essentially the same as deploying one with JavaScript. The only difference is in the…

Nested GraphQL Resolvers & Separating Concerns

Feb 22nd, 2020 / 7 min read

Unfortunately, in GraphQL, you can't nest operations to apply better grouping (namespacing / separation of concerns) to your services. Here…

How to Build a Compiler?

Feb 17th, 2020 / 3 min read

Today, in the Advanced JavaScript Developers group, someone asked the question: Musing from a Noob: so if you were to write a translator…

Recently Edited Wikis

3 Common Goals of Frontend Frameworks

Updated Jan 8th, 2020 / 1 min read

software design

Data storage, change detection, and data flow.

Monolithic Application

Updated Dec 2nd, 2019 / 2 min read

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An application where all the essential components are self-contained and deployed within a single process.