Khalil Stemmler
Head Coach at essentialist.dev
Old Toronto, Ontario, Canada
Summary
🤩
Rockstar🎓
Top SchoolKhalil Stemmler is a software essentialist and educator with 10 years of experience helping teams think like architects rather than just coders, currently leading coaching at essentialist.dev and publishing advanced TypeScript and Node.js guidance through his KhalilStemmler.com work. He blends hands-on full‑stack engineering—contributions to Apollo GraphQL tutorials and Domain-Driven Design projects—with a disciplined focus on testing, architecture, and the 80/20 of software design. As a former Developer Advocate at Apollo and co‑founder of Univjobs, he pairs product-minded engineering with developer education and community building. His open-source work shows deep TypeScript expertise across front-end, back-end, and test automation, notably implementing core domain logic and event systems for DDD apps. Based in Old Toronto, he is known for turning complex enterprise patterns into practical, testable code and teaching others to do the same.
10 years of coding experience
6 years of employment as a software developer
Bachelor’s Degree Bachelor of Science: Computing and Network Telecommunications Co Op Honours, Bachelor’s Degree Bachelor of Science: Computing and Network Telecommunications Co Op Honours at Sheridan CollegeAssumption College SchoolBachelor’s Degree Bachelor of Sciences: Computing and Network Telecommunications Co-Op Honours, Bachelor’s Degree Bachelor of Sciences: Computing and Network Telecommunications Co-Op Honours at Brock University
English
Stackoverflow
23reputation
2kreached
2answers
3questions
Github Skills (28)
uitest10
javascript10
testing10
sass10
typescript10
wpgraphql10
moc10
front-end-development10
jestjs10
apollo-client10
chai10
wordpress-graphql10
typescript-types10
graphql10
nodejs10
Programming languages (5)
Github contributions (5)
stemmlerjs/simple-typescript-starter
Aug 2019 - Nov 2022
The most basic TypeScript starter I could think of
Role in this project:
QA Engineer / Test Automation Engineer
QA Engineer / Test Automation EngineerContributions:37 commits, 14 PRs, 27 pushes in 3 years 3 months
Contributions summary:Khalil focused on implementing and configuring testing frameworks for the TypeScript project. They added a Prettier configuration, included Jest test configurations, and integrated Jest-Cucumber for behavior-driven testing. This involved creating and modifying test files, demonstrating a focus on testing and ensuring code quality.
thinktypescripttypescript-starterts-nodestarter-project
stemmlerjs/ddd-forum
Oct 2019 - Apr 2022
Hacker news-inspired forum app built with TypeScript using DDD practices from solidbook.io.
Role in this project:Front-end Developer
Front-end DeveloperContributions:162 commits, 21 PRs, 135 pushes in 2 years 7 months
Contributions summary:Khalil contributed significantly to the front-end of the Hacker News-inspired forum application, primarily by implementing and modifying React components. They updated the core React application structure using Create React App, introduced new components for the layout and UI elements, and integrated React Router for navigation. The user's work also encompassed the styling of the front-end using SASS and the integration of third-party libraries.
dddnestjsforumnewstypescript
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