Howdy 🤠

I'm Khalil Stemmler.

I'm a Developer Advocate at Apollo GraphQL.

I'm also a Canadian software developer, writer, and (ocassional) musician living in Southern Ontario.


If you have any questions for the blog or you'd like to arrange for a speaking engagement, I'd be happy to meet up and chat Apollo, architecture, TypeScript, or DDD. Feel free to send me an email or ping me on Twitter at @stemmlerjs.

I'm also on LinkedIn and GitHub.

What we do here

The goal of this blog is to:

Help developers write testable, flexible, and maintainable TypeScript & Node.js.

Now that you're here, you can find a lot of content on:

Who I write for

I'm working hard to create high-quality content on advanced TypeScript + Node.js topics for Junior JavaScript Developers who:

  • won't tolerate writing any more buggy production code
  • want to learn how to write maintainable, testable software
  • want to fast-track their way to senior-level roles
  • want to learn how to model complex object-oriented software with Node.js

In 2017, I co-founded (an unsuccessful startup called) Univjobs and learned a lot about making large Node.js codebases scale.

At some point during my work as a consultant and reading as many books on software as I could digest, I came to realize that there were a lot of pitfalls I could have avoided if I knew the patterns and principles to guide me.

Current projects

I'm currently working on a couple of projects in addition to my work at Apollo.

Boring stuff about me

I hold both a Bachelors Degree in Computer Science from Brock University after a few years of playing with robots, writing LaTex papers, and struggling with math.

I also have a fancy Diploma in Internet Communications Technology from Sheridan College after a few years of learning how to configure what happens after your packets leave your home router.

Fun stuff about me

You must really like me if you've read this far 😇

Here's some of the stuff I love to do outside of development, education, and advocacy.


I've been writing and recording music for about 16 years now and I think I've at least gotten pretty good least the recording side 😄

I'm also a huge music collector and genre-geek. Will happily chat your ear off about the golden eras of post-punk and hip-hop.

My music

I've written a lot of music over the years. In fact, I have about 4 hours of unreleased music from the last 2 years that I'd love to someday find the time to shape into an album (or 3).

When I lived in Ottawa, I used to play drums in a band called grindcore band called Gag Reflex, I performed a lot of solo stuff under Cyanide Canaries, and in 2017- I put out a post-punk album under Debutante.

I just do it cos I like it!

This year, my style is starting to drift towards slow and moody stuff like this and this, but also... this? A few more sleaford mods-y stuff like this and pure nonsense like this - note: they're all very rough demos that would be fun to finish sometime in 2020 or 2021.

I've curated a playlist of some of my best work from 2013-2017 called "College Songs" - highly recommend starting here ⭐.

Here are a few more selected works:

  • "Imperfect Picture". Trip-hop, electronic? I found several ol-timey video clips and worked them into this one.
  • "Mind Your Own", from a post-punk album I made in a basement in 2017.
  • "2:35 AM", a short that I scored the music for. By Turcin Soylu. (Audio seems a bit bass-boosted unfortunately).
  • "Riot". Noise rock + trip-hop kind of vibe. Sampled old funk breakbeats and Sonic Youth. This is normally the kind of thing that comes out when I sit down to make something.

Other people's music I like

I'm hugely into post-punk, junk-jazz, 90's hip hop, and synth pop.

Favourite artists of all time (in no particular order):

  • Nick Cave (the Birthday Party era)
  • Massive Attack
  • Beastie Boys
  • Wu Tang Clan
  • The Fall
  • The Wolfgang Press
  • The Smiths
  • Part Time
  • Cypress Hill
  • MF Doom

Here are two cool playlists I've been crafting for some time on Spotify.

I also noticed that these can only show you 100 songs in the embed, if you're interested- check out all my public playlists here.

And this one!

I wrote a piece specifically about why I'm drawn to brutalism in art, design, and music. You can read it here.

Tech stack

If you're interested in the tech stacks and tools I use, you can find that out here.

What else?

When I'm not coding or reading excellent software books (which I really must compile a list for), I write, longboard, and jog around town 🏃‍.

Stay in touch