Tj Holowaychuk
Web Developer at 350designs
Edmonton, Alberta, Canada
Summary
🤩
Rockstar
Top expert inWeb Development and JavaScript Ecosystem
Tj Holowaychuk is a seasoned web developer based in Edmonton with 17 years of hands-on experience building and hardening both front-end components and back-end Node.js ecosystems. He’s an active open-source contributor with meaningful work on widely used projects like Express, Koa, Mongoose, EJS and numerous utility libraries, spanning middleware, testing, template engines and tooling. Comfortable across the full stack, Tj has implemented UI components and animations as well as core server features, session stores, Redis integrations and performance-minded refactors. He brings a strong testing and QA mindset—adding assertions, benchmarks and improved error reporting across libraries such as supertest, socket.io and node-redis. Known for pragmatic, performance-oriented fixes and developer-friendly APIs, he also contributes to tooling and CLI utilities that improve everyday workflows. Based at 350designs, he combines deep open-source provenance with practical product delivery experience.
17 years of coding experience
Github Skills (186)
dependency-management10
go-modules10
benchmark10
parser10
website-development10
expressjs10
package-management10
python10
image-processing10
ui-components10
testing10
plugin-development10
table-html10
http10
command-line-interface10
Programming languages (19)
Github contributions (5)
tj/ejs
Jul 2010 - May 2014
Embedded JavaScript templates for node
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:158 commits, 2 comments in 3 years 10 months
Contributions summary:Tj primarily contributed to the development of the EJS library, enhancing its core functionality. Their work included implementing features such as custom tag support, filter support, and improved code generation for better stack traces. Furthermore, they addressed code quality by refactoring the parsing logic and improving the overall style. The user also added a variety of tests to increase the library's robustness and ensure the correct behavior of its features, including those relating to escaping and newlines.
javascriptjavascript-templatesnodejsembeddedembedded-javascript-templates
expressjs/express
Jun 2009 - Feb 2014
Fast, unopinionated, minimalist web framework for node.
Role in this project:Back-end Developer
Back-end DeveloperContributions:4071 commits, 3 comments in 4 years 8 months
Contributions summary:Tj primarily contributed to improving the backend functionality and structure of the Express.js framework. The contributions include fixing multipart application examples, documenting changes, and adding and updating documentation to the core framework. They were involved in implementing support for view options, and for code changes to the templating engine.
expressjsminimalistjavascriptexpressframework
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.